Need help please and thanks :)

Answers:

The value of x is exact. The y value is approximate.

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Explanation:

Let's subtract the equations straight down.

After doing those three sets of subtractions, we have the new equation -22x = 0. This solves to x = 0 after dividing both sides by -22.

Plug this x value into any of the two original equations to solve for y

9x + 7y = 48

9(0) + 7y = 48

7y = 48

y = 48/7

y = 6.857 approximately

y = 6.9

Answer:

12

Step-by-step explanation:

their is 12 zeros so it's 12

Answer:

it would be one solution

Step-by-step explanation:

It has one solution and is also a real number, but there's no pi or square root, so i'd go with one solution for the correct answer

Answer: One solution.

x=4

Step-by-step explanation: 5x+2−2x=2x+14−2x                                               3x+2−2=14−2                                                                                                       3x/3=12/3                                                                                                             x=4                

Answer:I donno

Step-by-step explanation:

If you flip a coin once, you have a 1/2 chance of getting heads. You will get either a head or tail.

Flipping a coin twice gives you a 1/4 chance of getting 2 heads since you will either get a 2 heads, 2 tails, a tail then head, or a head then tails.

From this we can see its pretty likely the pattern will continue if our chances of continually getting a head keeps halfing. So we can represent it as 1/2^n (half to the power of n) where n is the number of times we flip the coin.

So the odds of flipping a coin 5 times and getting 5 heads are 1/2 ^5 (half to the power of 5). Which gives us 1/32 or just over a 3% chance.

Here we have a probability problem.

We will find that the expected number of students that gets 5 heads in a row is 3.

First, we need to find the probability of getting 5 heads in a row.

We assume that the probability of getting heads in a flip is p = 1/2 = 0.5

Then for getting heads 5 times in a row, the joint probability will be the product of the individual probabilities, we get:

[tex]P = (0.5)*(0.5)*(0.5)*(0.5)*(0.5) = (0.5)^5 = 0.03125[/tex]

Now if we have N persons, such that all of them flip a coin 5 times, the expected number of people that will get 5 heads in a row will be equal to the total number of people times the probability of getting 5 heads in a row.

N*P

So if in the class there are 100 students, we have N = 100

The expected number of students that will get 5 heads in a row is:

[tex]100*P = 100*0.03125 = 3.125[/tex]

Because we can have a 0.125 of a student, we need to round this to the nearest whole number, which is 3.

So we should expect that 3 students will get 5 heads in a row.

If you want to learn more, you can read:

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Answer:

[tex]? \times \frac{?}{?} [/tex]

d

Answer:

2 by 25 feet.

Step-by-step explanation:

Let L and W be the length and the widht of the field

we want W = L + 23 and W x L = 50

So

(L + 23) x L = 50

[tex]L^2 + 23L = 50\\L^2+23L-50 =0\\(L+25)(L-2)=0\\L=-25 \text{ or } L = 2[/tex]

Since L must be positive then L =2 and W = 2 + 23 = 25.

Answer:

x=12

Step-by-step explanation:

2(x-5)=14

Multiply 2 into the parenthesis

2x-10=14.

Add 10 both sides.

2x=24

Divide 2 both sides.

x=12

To median should be reported in the to show th general measure of center since we have a skewed distribution.

The plot of the histogram Given is skewed to the right, hence it is positively skewed.

In a positively skewed distribution, the mean value of the distribution is always greater than the median. However, it does not give an accurate measure of center as much as the median does.

Therefore, if a player want to emphasize that his team generally scored a lot of points, then reporting the median would be best as it gives a better measure of center.

If the data was normally distributed, then the mean would be a better measure of center.

Learn more : https://brainly.com/question/1363341?referrer=searchResults

Answer:

b

Step-by-step explanation:

becuse it looks like she talking about the letter b

Answer: the third option I believe

Step-by-step explanation:

Answer:

19/18

Step-by-step explanation:

The mixed number 2 3/8 can be changed into the improper fraction 19/8.

Answer:

0.54

Step-by-step explanation:

27/50

= 0.54

Hope it helps.

Answer:

x1=8

x2=1/5

Step-by-step explanation:

Answer:

[tex]c = 300000 {(1.05)}^{50} [/tex]

Step-by-step explanation:

The future value formula is FV=PV(1+i)^n, where the present value PV increases for each period into the future by a factor of 1 + i.  value PV increases for each period into the future by a factor of 1 + i. 

[tex]fv = pv {(1 + r)}^{n} [/tex]

fv = future value

pv = present value

r = annual interest rate ( decimal number)

n= period

Answer:

55

Step-by-step explanation:

20 * 3 = 60

60 marks - 5 Incorrect answer (5 marks deducted)

55 Marks

Answer:

x = 8

y = -6

Step-by-step explanation:

Vertical lines have a undefined slope and horizontal lines have a slope of 0. You'll write the equations for these types of lines like this.

Since we don't have two points, we are going to have to graph the points and draw a line to find the intercepts. The graphs will be shown below. From finding out what the intercepts are, we can substitute the according values into the formula shown above.

x = 8

y = -6

Best of Luck!

-2a + 6b

= -2(6) + 6(-3)

= -12 + (-18)

= -30

[tex]\huge\textsf{Hey there!}[/tex]

[tex]\huge\textsf{-2a + 6b}[/tex]

[tex]\huge\textsf{= -2(6) + 6(-3)}[/tex]

[tex]\huge\textsf{= -12 + (-18)}[/tex]

[tex]\huge\textsf{= -12 - 18}[/tex]

[tex]\huge\textsf{= -30}[/tex]

[tex]\huge\textsf{Therefore, your answer is: -30}[/tex]

[tex]\huge\textsf{Good luck on your assignment \& enjoy your day! }[/tex]

Answer:

Both triangles have marked congruent angles

Step-by-step explanation:

Answer:

B) Ground speed: 639 mph; direction 161°

Step-by-step explanation:

165° = 75° South of East = S15°E, therefore;

The component of the speed of the airplane are;

650 × cos(75°) East or x-direction in vector form:[tex]$650 \times \cos \left(75^{\circ}\right) \mathrm{i}$[/tex]

650 × sin(75°) South or negative y-direction in vector form: [tex]$-650 \times \sin \left(75^{\circ}\right) \mathrm{j}$[/tex]

The speed of the airplane is [tex]$650 \times \cos \left(75^{\circ}\right) \mathrm{i}-650 \times \sin \left(75^{\circ}\right) \mathrm{j}$[/tex]  

The speed of the wind in vector form is 25i + 25·√3 j

The combined speed of the airplane and the wind is found as follows;

Combined: [tex]$\left(650 \times \cos \left(75^{\circ}\right)+25\right)\left[\dot{i}+\left(25 \cdot \sqrt{3}-650 \times \sin \left(75^{\circ}\right)\right) \mathrm{j}\right.$[/tex], which gives;

The resultant speed of the airplane, [tex]$\left.R=\sqrt{(} 193.23^{2}+(-584.55)^{2}\right)=615.66$[/tex]

The resultant speed of the airplane, [tex]$\mathrm{R}=615.66 \mathrm{mph}$[/tex]

The direction =[tex]$\arctan ((-584.55) /(193.23))=-71.7^{\circ}$[/tex]

The bearing [tex]$=90^{\circ}+71.7^{\circ}=162^{\circ}$[/tex]

Therefore, the closest option is option B, ground speed: 639 mph; direction 161°

Learn more about speed refer:

Answer:

is it 301.818181818

Step-by-step explanation:

if not i don't know i never learned that and that's wat the calculator gave me

Answer: yes

Step-by-step explanation:

Step-by-step explanation:

a (-infinite , -3) U (3 , infinite)

b + 5 , - 5

Answer:

Step-by-step explanation:

The symbol [tex] \sqrt[n]{a}[/tex] means [tex]a^{1/n}[/tex].

So then

[tex]\sqrt[4]{81}=81^{\frac{1}{4}}[/tex].

The expression that shows Terica's first step is [tex]81^\frac{1}{4}[/tex].

An exponents indicates how many times a number is multiplied by it self.We need this form as it is more compact when writing large large numbers.

According to the given question Terica correctly simplifies the radical expression  [tex]\sqrt[4]{81}[/tex] by first rewriting it as a rational exponent.

We know [tex]\sqrt[n]{x}[/tex] can be written in rational exponent as [tex]x^\frac{1}{n}[/tex].

∴ [tex]\sqrt[4]{81}[/tex] can be written in radical exponent as [tex]81^\frac{1}{4}[/tex] which is

= [tex](9^2)^\frac{1}{4}[/tex].

= [tex](9)^\frac{2}{4}[/tex].

= [tex](3^2)^\frac{2}{4}[/tex].

= [tex](3)^\frac{4}{4}[/tex].

= [tex]3^1[/tex].

= 3.

learn more about exponents here :

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Answer:

These triangles are simliar because they're all scalene.

Step-by-step explanation:

The triangle ABC is an acute (having angles less than 90 degrees), scalene (no equal sides) triangle.

The triangle BCD is also an acute triangle and scalene.

The triangle ABD is an obtuse (having an angle over 90 degrees), scalene triangle.

9514 1404 393

Answer:

  48

Step-by-step explanation:

About 2/3 of her 72 shots will land near the hole.

  2/3 × 72 = 48

Her ball will land near the hole approximately 48 times.

Answer:

-9

Step-by-step explanation:

Answer:

x = 9

Step-by-step explanation:

For a vertical line, slope is undefined as tan π/2 is undefined. Therefore we cannot express the equation of straight line in terms of it's slope.

For a vertical line, equation is given by, x = c where c is the point on x axis from which the given line passes.

Therefore x = 9 is the equation.

Answer:

BC=3

Step-by-step explanation:

We can solve this by eliminating given detail of A.

AC=13 , AB=10

To find BC, We minus AC With AB

BC= AC-AB

BC=3

3 Is the final answer

I hope this helps, dont hesitate to ask for any question.

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