I need help solving number 4 I have a test tomorrow and this is a review

I Need Help Solving Number 4 I Have A Test Tomorrow And This Is A Review

Answers

Answer 1

We will have the following:

Right away we can see that if we are to plug in x = 35 in one of the expressions, the only one that would give as solution y = 1 is the solution; thus, the solution is the function:

[tex]y=\frac{1}{35}x[/tex]


Related Questions

Use the Law of Sines to solve the triangle. Round your answers to two decimal places.A = 8° 40', B = 13° 15', b = 4.8

Answers

Given

[tex]A=8°40^{\prime},B=13°15^{\prime},b=4.8[/tex]

To find the value of a, c, C.

Explanation:

It is given that,

[tex]A=8°40^{\prime},B=13°15^{\prime},b=4.8[/tex]

Since,

[tex]A=8°40^{\prime},B=13°15^{\prime}[/tex]

Then,

[tex]\begin{gathered} A+B+C=180 \\ 8\degree40^{\prime}+13\degree15^{\prime}+C=180\degree \\ C=180\degree-21\degree55^{\prime} \\ C=(179-21)\degree(60^-55^)^{\prime} \\ C=158\degree5^{\prime} \end{gathered}[/tex]

Therefore, by using Sine law,

[tex]\begin{gathered} \frac{\sin A}{a}=\frac{\sin B}{b}=\frac{\sin C}{c} \\ \frac{\sin8\degree40^{\prime}}{a}=\frac{\sin13\degree15^{\prime}}{4.8}=\frac{\sin158\degree5^{\prime}}{c} \\ \Rightarrow\frac{\sin8\degree40^{\prime}}{a}=\frac{\sin13\degree15^{\prime}}{4.8} \\ \Rightarrow\frac{\sin13\degree15^{\prime}}{4.8}=\frac{\sin158\degree5^{\prime}}{c} \end{gathered}[/tex]

Therefore,

[tex]\begin{gathered} \begin{equation*} \frac{\sin8\degree40^{\prime}}{a}=\frac{\sin13\degree15^{\prime}}{4.8} \end{equation*} \\ \frac{0.14608}{a}=\frac{0.227501}{4.8} \\ a=\frac{0.14608}{0.047396} \\ a=3.08211 \\ a=3.1 \end{gathered}[/tex]

Also,

[tex]\begin{gathered} \begin{equation*} \frac{\sin13\degree15^{\prime}}{4.8}=\frac{\sin158\degree5^{\prime}}{c} \end{equation*} \\ 0.047396=\frac{0.366501}{c} \\ c=\frac{0.366501}{0.047396} \\ c=7.73274 \\ c=7.7 \end{gathered}[/tex]

Hence, the answer is

[tex]C=158\degree5^{\prime},a=3.1,c=7.7[/tex]

A company wants to decrease their energy bill by 14%. If their electric bill is currently $2,900 a month, what will their bill be if they are successful? Round your answer to the nearest dollar.$______

Answers

To solve this problem, first, we will determine the 14% of $2,900 and then we will subtract that amount from $2,900.

Recall that to compute the x% of y we can use the following expression:

[tex]y\cdot\frac{x}{100}\text{.}[/tex]

Using the above expression, we get that the 14% of 2,900 is:

[tex]406.[/tex]

Therefore, if they succeed the next month they should receive a bill for

[tex]2900-406=2494[/tex]

dollars.

Now, if they pay less than the above amount they can consider it a success.

Answer:

$2494.

Yes, that is a success.

help me pleaseee!!!





thank you

Answers

The equation of the line is y = 800x + 294000 and the average price of a new home in 2014 is $302000.

What is the slope?

The ratio that y increase as x increases is the slope of a line. The slope of a line reflects how steep it is, but how much y increases as x increases. Anywhere on the line, the slope stays unchanged (the same).

[tex]\rm m =\dfrac{y_2-y_1}{x_2-x_1}[/tex]

The line passes through the points:

(0, 294000) and (7, 288400)

The equation of the line:

y - 294000 = (288400 - 294000)/(7)[x]

y - 294000 = 5600/7 (x)

y = 800x + 294000

x = 2014 - 2004 = 10

Plug x = 10 in the above equation:

y = 800(10) + 294000

y = 302000

Thus, the equation of the line is y = 800x + 294000 and the average price of a new home in 2014 is $302000.

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Given f(x) = 1 - 2x with the range {-3, -5, -7}, find the domain.ОООО{2,3,4}{7, 11, 15){2, 15){-7,8}

Answers

Here is the answer: {2,3,4}

option A

PLS HELP FAST!! Question due in 5 minutes!!!

Answers

Answer:

Leg 1: 4

Leg 2: 3

Hypotenuse: 5

Step-by-step explanation:

Pythagorean Theorem

a^2+b^2=c^2

4^2+3^2=c^2

16+9=c^2

25=c^2

5=c

Hope this helps :)

Answer: side c =5

Step-by-step explanation:

We can use Pythagorean Theorem.

a squared + b squared = c squared

We know leg a is 4 units and leg b is 3 units.

4^2+3^2=16+9=25

We square root both c and 25 to get our answer.

sqr 25= sqr c squared

5=c

John connected three resistors in series. The equivalent resistance of series resistors is the sum of the values of the individual resistors. If John used resistors which were 2.2 × 102 ohms, 3.3 × 103 ohms, and 4.7 × 104 ohms, what was the equivalent resistance? Choice 'A'5.052 × 104 ohmsChoice 'B'50.52 × 103 ohmsChoice 'C'505.2 × 105 ohmsChoice 'D'5.052 × 103 ohms

Answers

Given resistors are:

[tex]\begin{gathered} 2.2\times10^2ohms \\ 3.3\times10^3ohms \\ 4.7\times10^4ohms \end{gathered}[/tex]

The equivalent resistance is the sum which is obtained below

We can re-write the values given as follow

[tex]2.2\times10^2+33\times10^2+470\times10^2[/tex]

=>

[tex]505.2\times10^2\text{ohms}[/tex]

We can then convert this

We will get

[tex]\begin{gathered} 505.2\times10^2\text{ohms=}5.052\times10^4ohms=50.52\times10^3ohms \\ \end{gathered}[/tex]

1. Look at the figure, OJKLM. Find the length of JKM5x-114+ 2xK

Answers

Answer: 24

Explanation

Opposite sides of a parallelogram are congruent.

Thus, assuming JKLM as a parallelogram, then:

[tex]5x-1=14+2x[/tex]

By solving we get:

[tex]5x-2x=14+1[/tex][tex]3x=15[/tex][tex]x=\frac{15}{3}[/tex][tex]x=5[/tex]

Finally, replacing this value in the expression of JK to know the value of JK:

[tex]JK=14+2(5)[/tex][tex]JK=14+10[/tex][tex]JK=24[/tex]


[tex] \sqrt{20} \times \sqrt{15} \times \sqrt{3} [/tex]
can you help me solve it​

Answers

The answer is equal to 40

two number cubes are rolled for two separate events event A is the event that the sum of the numbers on both cubes is less than 10 event B is the event that the sum of the numbers on both cubes is a multiple of 3 find the conditional probability of B given A occurs first enter your answer as a simplified fraction

Answers

We have two events:

A: sum of the numbers is less than 10.

B: sum of the numbers is a multiple of 3.

We can calculate the probabilities as a quotient of the "success" events and all the possible events.

The conditional probability P(B | A) is equal to the probability of P(A intersection B) divided by P(A). That is because, if A is given, then if B happens, A had also happen.

The "success" events for intersection A and B are:

{1,2}, {2,1}, {1,5}, {5,1}, {2,4}, {4,2}, {3,3}, {3,6}, {6,3}, {4,5}, {5,4}

There are a total of 11 results that belong to the intersection of A and B (sum less than 10 and multiples of 3).

Now, we calculate the results that correspond to event A:

{1,1}, {1,2}, {2,1}, {1,3}, {3,1}, {1,4}, {4,1}, {1,5}, {5,1}, {1,6}, {6,1}

{2,2}, {2,3}, {3,2}, {2,4}, {4,2}, {2,5}, {5,2}, {2,6}, {6,2}

{3,3}, {3,4}, {4,3}, {3,5}, {5,3}, {3,6}, {6,3}

{4,4}, {4,5}, {5,4}

There are 30 results that correspond to event A (sum is less than 10).

Then we can calculate P(B | A) as:

[tex]P(B|A)=\frac{P(A\cap B)}{P(A)}=\frac{11}{30}[/tex]

The conditional probability of B given A is P(B|A) = 11/30.

I'm having trouble answering this Simplifying Variable Expressions question I will have two pictures. One will be for the actual question and the other one is for the steps

Answers

Given the expression:

[tex]-7(-15w+21)+3(18-27w)[/tex]

We will simplify the expression as follows:

1) using the distributive property to expand the expression:

[tex](-7)\cdot(-15w)+(-7)\cdot21+3\cdot18+3\cdot(-27w)[/tex]

2) using the commutative property:

[tex]\begin{gathered} 105w-147+54-81w \\ =105w-81w-147+54 \end{gathered}[/tex]

3) Combine the like terms:

[tex]=24w-93[/tex]

So, the answer will be 24w - 93

If the figures are similar, use a proportion to find the missing side?

Answers

Given:

The figure is

Find-:

The value of "x"

Explanation-:

The ratio of sides is

Compared with angle sides is

[tex]\frac{28}{21}=\frac{8}{6}=\frac{30}{x}[/tex]

So, the value of "x" is

[tex]\begin{gathered} \frac{8}{6}=\frac{30}{x} \\ \\ x=\frac{30}{8}\times6 \\ \\ x=\frac{30}{4}\times3 \\ \\ x=\frac{15}{2}\times3 \\ \\ x=\frac{45}{2} \\ \\ x=22.5 \end{gathered}[/tex]

The value of "x" is 22.5

Mr. Braid asks every 6th person entering the auditorium for the spring concert at school if they would approve of taking money from the school sports budget to pay for a school play.
a) State the objective



b) population



c) and sample of the survey.



d) Then share if there is any bias in the sample.5

Answers

a. The objective is to know if they will approve of taking money from the school sports budget to pay for a school play.

b. The population is the students entering the auditorium.

c. The sample of the survey is this 6th person entering the auditorium.

d. There is no bias.

What is population?

It should be noted that population simply means the people that the researcher makes research on.

The sample are those selected.

It should be noted that the objective is the reason why the research is carried out.

In conclusion, there's no bias as it's not preferential but a random selection.

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PLEASE HELP WITH NUMBER 16

Answers

Answer: C: Exam>=90

Step-by-step explanation:

The flaw you did was divided it by two, but you have to divide it by the number of numbers you have, which would be 4. that would give you 75, and then you have to figure out what score you would need to get on two tests (The question says it counts as 2 tests) which ends up being 90% to give you an 80%. So the answer is C! I hope this helps :)

A flagpole 95.2 ft. Tall is on top of a building. From a point on level ground, the angle of elevation of the top of the flagpole is 34.1° , while the angle of elevation of the bottom of the flagpole is 25.8° . Find the height of the building.

Answers

Let x be the height of the building

We will first make a sketch

[tex]\tan \theta=\frac{opposite}{\text{adjacent}}[/tex][tex]\tan 25.8=\frac{x}{y}[/tex]

[tex]y=\frac{x}{\tan 25.8}[/tex][tex]\tan 34.1=\frac{95.2+x}{y}[/tex]

substitute the y-value in the above

[tex]\tan 34.1=\frac{95.2+x}{\frac{x}{\tan 25.8}}[/tex][tex]\tan 34.1=(95.2+x)\text{.}\frac{tan25.8}{x}[/tex][tex]x\tan 34.1=(95.2+x)\tan 25.8[/tex]

x (0.677) = (95.2 + x)0.4834

open the parenthesis

0.677x = 46.01968 + 0.4834x

subtract 0.4834x from both-side of the equation

0.677x - 0.4834x = 46.01968

0.1936x = 46.01968

Divide both-side by 0.1936

x≈ 237.7 ft

[tex]x\approx238\text{ f}eet[/tex]

AJ's Car used 3 1/4 gallons of gas on a trip to the beach assume one gallon equals 3.8 what is the best estimate of number of liters AJ's Car use

Answers

[tex]\begin{gathered} \text{ if one gallon is 3.8 liters, then } \\ 3\frac{1}{4}=\frac{13}{4}\text{ gallons is } \\ \\ \frac{13}{4}\cdot3.8=\frac{49.4}{4} \\ =\frac{49.4}{4} \\ \\ \text{ The car used }\frac{49.4}{4}\text{Liters} \end{gathered}[/tex]

Gina has a box of red,blue,and green markers.The ratio of the number of red markers to the number of blue markers is 5:2.The ratio to the number of blue markers to the number of green markers is 3:5.What is the ratio of the number of red markers to the number of green markers?

Answers

Answer: 5:5

Step-by-step explanation:

Use the information to figure out how much you have of each color, then put in ratio.

Cosh x = 25/7, x > 0

Answers

we have

cosh(x)=25/7 and x>0

Remember that

[tex]\cos h^2(x)-\sinh ^2(x)=1[/tex]

substitute the given function

[tex](\frac{25}{7})^2-\sinh ^2(x)=1[/tex][tex]\sinh ^2(x)=\frac{625}{49}-1[/tex][tex]\sinh ^2(x)=\frac{576}{49}[/tex]

therefore

sinh(x)=24/7

Hello, I need some assistance with this homework question please for precalculusHW Q44

Answers

SOLUTION:

Case: Logarithms

A logarithm is the opposite of power. In other words, if we take a logarithm of a number, we undo exponentiation.

We consider the log of power law below:

[tex]\begin{gathered} \log_aa^x=x\log_aa \\ =x \end{gathered}[/tex]

Given:

[tex]\log_33^{66}[/tex]

Required: Without using calculators, use log laws to answer

Method:

Applying the law above,

[tex]\begin{gathered} \log_33^{66} \\ =66\log_33 \\ =66\times1.(Remember\text{ same base law: }\log_33=1 \\ =66 \end{gathered}[/tex]

Final answer:

66

1) how many mg are equal are in 64 hectometers?2) 52000 micrometers (um) to Gm (giga)

Answers

1) 64 * 10^5 mg 2) 5.2 * 10^-11gm

Explanation:

There is no direct conversion from mg to hectometers

The conversions available:

1 m³ = 10^-6 hm³

where hm = hectometer

Also 1 hm³ = 1 * 10 ^15 mg

64 hm³ = 64 * 1 * 10 ^15 mg

= 64 * 10 ^15 mg

1 hm³ = 1hm * 1hm * 1hm

To get 1 hm, we will find the cube root of the value in mg:

[tex]\begin{gathered} 1hm\text{ = }\sqrt[3]{10^{15}mg} \\ 1\text{ hm = }10^5mg \\ 64\text{ hm = 64}\times10^{^5}mg \end{gathered}[/tex]

64 hectometers = 64 * 10^5 mg

2) 1 µm = 10^-15gm

52000 µm = 52000 * 10^-15gm

= 5.2 * 10 ^4 * 10^-15gm = 5.2 * 10^(4-15) gm

= 5.2 * 10^-11gm

Find an equation for the line with slope
m=5 and which goes through the point (8,−9).
Write your answer in the form y=mx+b

Answers

An equation of line with slope m = 5 and which goes through the point (8, -9) is y = 5x - 49

In this question, we have been given a slope of the line and a point (8, -9)

We need to find an equation of the line with slope m = 5 and which goes through the point (8, -9)

Let (x1, y1) = (8, -9)

Using the slope-point form of the line,

y - y1 = m(x - x1)

y - (-9) = 5(x - 8)

y + 9= 5x - 40

y = 5x - 40 - 9

y = 5x - 49

Therefore, an equation of line with slope m = 5 and which goes through the point (8, -9) is y = 5x - 49

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Suppose 30% of Americans will take the flu shot this season. Consider a random sample of 50 people. Let X be the number of the people who will take the flu shot. What the average number of X? (Round your answer to the nearest whole number)

Answers

Using percentages we can conclude that the average number is x is 15.

What is the percentage?A percentage is a number or ratio expressed as a fraction of 100 in mathematics. Although the abbreviations "pct.", "pct.", and occasionally "pc" is also used, the percent sign, "%," is frequently used to indicate it. A percentage is a number without dimensions and without a standard measurement. By dividing the value by the total value and multiplying the result by 100, one can determine the percentage. The percentage calculation formula is (value/total value)100%.

So, an average number of x:

A random sample is 50 people and 30% will get the flu shot.So, get 30% of 50 as follows:50/100 × 30 = 15

Therefore, using percentages we can conclude that the average number is x is 15.

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Stephanie practiced the piano for 1 hour 15 min per day. If she practiced for 8 days, what was her total practice time?

Answers

answer: 10 hours

convert 1 hour and 15 minutes into minutes, you should get 75 minutes.

multiply 75 by 8 (because 75 minutes for 8 days) and you should get 600 minutes

600 minutes is a fine answer, but if you want to simplify it, divided 600 minutes by 60 (because we’re converting it into hours and there are 60 minutes in an hour)

600/60 = 10

so she practiced for 10 hours in 8 days



Answer:

10 hours

Step-by-step explanation:

1 hour 15 mins = 75 minutes


75 minutes x 8 days = 600 total in minutes


600 minutes/ 60 minutes = 10 hours

Another method is to add the parents’ heights in inches and then add an additional 5 inches if the child is a boy or subtract 5 inches if the child is a girl. This total is then divided by 2 to predict the child’s ultimate height.Use the variable D, height of dad) and M, height of mom Write a formula for a boy’s adult height. Write the formula for a girl’s adult height.

Answers

Concept:

Write the variables

Height of dad = D inches

Height of mum = M inches

Step 1:

Total parent's height = D + M

Step 2:

The formula for a boy's adult height

[tex]=\text{ }\frac{D\text{ + M + 5}}{2}\text{ inches}[/tex]

Step 3:

The formula for a girl’s adult height.​​​​​​

[tex]=\text{ }\frac{D\text{ + M - 5}}{2}\text{ inches}[/tex]

The countries with the most widgets in the world are the United States and France. If the United States has 2006 more widgets than France and the total number of widgets is 8306. Find the number of widgets for each country.

Answers

Given:

a.) The United States has 2006 more widgets than France.

b.) The total number of widgets is 8306.

Let,

x = The number of widgets the United States has

y = The number of widgets France have

x = y + 2006 ; Since the United States has 2006 more widgets than France.

From the given scenario, we generate the following equation:

[tex]\text{ x + y = 8306}[/tex]

Let's determine the value of x and y.

[tex]\text{ x + y = 8306}[/tex][tex]\text{ (}y+2006)\text{ + y =8306}[/tex][tex]\text{ }y+2006\text{ + y =8306}[/tex][tex]\text{ }y+\text{ y =8306 - }2006[/tex][tex]\text{ 2y = }6,300[/tex][tex]\text{ }\frac{\text{2y}}{2}\text{ = }\frac{6,300}{2}[/tex][tex]\text{ y = }3150[/tex]

Therefore, France has 3150 Widgets.

Let's determine the number of fidgets the United States has. Use y = 3150 in the equation x + y = 8306.

[tex]x+y=8306[/tex][tex]x+3150=8306[/tex][tex]x=8306\text{ - }3150[/tex][tex]x=5156[/tex]

Therefore, the United States has 5156 Widgets.

A computer program found that the line c = 2t - 89 is a good fit for the data, Use this equation to predict how many cups of lemonade Lin might sell on a day when the high temperature is 74 degrees. Enter your answer in the box below. Answer:Ocups. The high temperature this Sunday is expected to be 5 degrees warmer than the high temperature this Saturday. Using the line c = 2t - 89. how many more cups of lemonade should Lin expect to sell on Sunday than Saturday? Explain or show your reasoning. Enter your response here

Answers

Part 1. Find how many cups will Lin sell when the high temperature is 74°.

We are given the expression:

[tex]c=2t-89[/tex]

Where is c is the number of cups that Lin might sell and t is the high temperature.

We have the value of the high temperature:

[tex]t=74[/tex]

And to solve this problem we need to substitute t=74 into the given expression:

[tex]\begin{gathered} c=2t-89 \\ \text{Substituting t=74} \\ c=2(74)-89 \end{gathered}[/tex]

Solving the operations:

[tex]\begin{gathered} c=148-89 \\ c=59 \end{gathered}[/tex]

Answer (for part 1): 59 cups.

Part 2. Find how many more cups of lemonade Lin should sell on Sunday than Saturday.

We will call the high temperature on Saturday "x". The number of cups that Lin Might sell for x temperature is:

[tex]c=2x-89[/tex]

Now, we are told that the temperature on Sunday is expected to be 5° warmer, so we represent the high temperature on Sunday as 5 more than the temperature on Saturday (which we called x).

Thus, the temperature on Sunday is:

[tex]t=x+5[/tex]

And we substitute this into the expression:

[tex]\begin{gathered} c=2t-89 \\ \text{Substituting t=x+5} \\ c=2(x+5)-89 \end{gathered}[/tex]

Using the distributive property on the right-hand side of the equation:

[tex]\begin{gathered} c=2x+2\cdot5-89 \\ c=2x+10-89 \end{gathered}[/tex]

Re-arranging the expression:

[tex]c=(2x-89)+10[/tex]

Comparing this with the expression we got for Saturday:

[tex]\begin{gathered} \text{Saturday:} \\ c=2x-89 \\ \text{Sunday:} \\ c=(2x-89)+10 \end{gathered}[/tex]

As you can see, 10 more cups were sold on Sunday than on Saturday.

Answer (for part 2): 10 more cups

how do i find the zeros of y=6x^2-6

Answers

The given quadratic equation y = 6x² - 6 contains two zeros :

(x - 1) and (x + 1)

Solution:

Steps to solve quadratic equation:

Transform the equation into standard form, with one side set to zero. Take into account the non-zero side. Make each factor equal to zero (Remember: a product of factors is zero if and only if one or more of the factors is zero). Solve each of the resulting equations.

Given quadratic equation ,

      y = 6x² - 6

 To find the zeros we have to solve the equation ,

      y = 6x² - 6

    = 6( x² -1 )

    = 6( x² + x - x -1)

    = 6(x ( x + 1) - 1( x + 1 ))

    = 6 ( x - 1)  ( x + 1 )

The equation y = 6x² - 6 contains two zeroes

=  (x-1) and (x + 1)

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cos^2x(1+tan^2x)=1 simplify

Answers

After simplifying cos^2x(1+tan^2x)=1, we get LHS = RHS.

The given equation is a trigonometric equation, that includes trigonometric ratios which basically are the ratios of sides or lengths of a right angle triangle.

To simplify the given equation, we use the identity (sec^2 x - tan^2 x = 1)

that is further (sec^2 x = 1+tan^2 x)

Lets take LHS (left hand side) first,

cos^2x(1+tan^2x)

By putting the identity in LHS equation, we get

cos^2 x (1 + tan^2 x )

cos^2 x (sec^2 x)

As we know that sec^2 = 1/cos^2

Hence, cos^2 x *(1/cos^2 x)

cos^2 is eliminated by division,

= 1 which is equal to RHS

Hence, simplified and LHS = RHS

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After simplification, the trigonometric function becomes equal to each other i.e. LHS = RHS.

What are Trigonometric Functions ?

The trigonometric functions are real functions which relate an angle of a right-angled triangle to ratios of two side lengths.

What are Trigonometric Ratios used for ?

In trigonometry, sin, cos and tan values are the primary functions we consider while solving trigonometric problems. These trigonometry values are used to measure the angles and sides of a right-angle triangle. Apart from sine, cosine and tangent values, the other three major values are cotangent, secant and cosecant.

To simplify the given equation, we would use the identity (sec^2x - tan^2x=1) which is (sec^2x = 1 + tan^2x)

Firstly we will solve the LHS side

cos^2x(1+tan^2x)

By inserting the identity in LHS equation, we get

cos^2x(1+tan^2x)

cos^2x(sec^2x)

As sec^2 = 1/cos^2

Therefore, cos^2x *( 1/cos^2x)

cos^2 is eliminated by division,

= 1

which is equal to RHS

Hence solved and LHS = RHS

After simplification, the trigonometric function becomes equal to each other i.e. LHS = RHS.

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Help meeee quickly, I will mark brainliest!

Answers

Answer:

adjacent and corrasopnding

Step-by-step explanation:

Options for the first time:increases, remains the same, decreases Options for the second box: increases, remains the same, decreases Options for the third box: reflects over the x-axis, remains the same, reflects over the y-axis

Answers

The general form of a trigonometric function is:

[tex]A\sin (B(x-C))+D[/tex]

Where B is the frequency of the function.

In our problem, A=1, C=D=0.

Then, as the value of B increases, so the frequency does. The answer to the second gap is 'increases'.

On the other hand, let P be the period and f the frequency. Those two quantities are related by the formula:

[tex]f=\frac{1}{P}[/tex]

Then, if the frequency increases, the period decreases. The answer to the first gap is 'decreases'.

Finally, if B is negative we have that:

[tex]\begin{gathered} B<0,A=-B,A>0 \\ \Rightarrow\tan (Bx)=\frac{\sin(Bx)}{\cos(Bx)}=\frac{\sin(-Ax)}{\cos(-Ax)}=-\frac{\sin(Ax)}{\cos(Ax)}=-\tan (-Bx) \end{gathered}[/tex]

Therefore, the function is reflected over the x-axis.

can i get help on this?Number of digits in phone number is 7.

Answers

There are 7 digits in phone number. The first digit cannot be 0 and 1. So first digit can be filled by 8 numbers (from 2 to 9). Remaining 6 digits of the phone number can be filled by all 10 number (0 to 1).

The possible number of 7 digit phone numbers are,

[tex]8\cdot10\cdot10\cdot10\cdot10\cdot10\cdot10=8,000,000[/tex]

So 8,000,000 different numbers are possible.

Answer: 8,000,000

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