ANSWER
x = -2, y = 7, z = 2
EXPLANATION
We are given a system of three equations:
2x + 3y - 4z = 9 ________(1)
4y - 6z = 16 ___________(2)
z = 2 ________________(3)
Since we have been given the value of z, from (3) we have that (2) becomes:
4y - 6(2) = 16
4y - 12 = 16
4y = 12 + 16 = 28
y = 28 / 4
y = 7
Put the values of y and z in (1):
=> 2x + 3(7) - 4(2) = 9
2x + 21 - 8 = 9
2x + 13 = 9
Collect like terms:
2x = 9 - 13 = -4
x = -4 / 2
x = -2
So, x = -2 and y = 7 and z = 2
An isosceles triangle has an angle that measures 102 degrees. What measures are possible for the other two angles ? Choose all that apply 75, 39, 18, 8
Answer:
39 °
Step-by-step explanation:
Isosceles means two angles , x, are =
x + x + 102 = 180 ( the sum of triangle angles always = 180)
2x = 78
x = 39 °
Evaluate 9yl – yº if y = – 8.-71-73- 2- 64
First of all, we need to rules to solve this:
[tex]\begin{gathered} a^0=1,a\ne0 \\ a^1=a,a\text{ any number} \end{gathered}[/tex]So, the equation to be evaluated can be reduced to:
[tex]\begin{gathered} y=-8\Rightarrow9y^1-y^0=9y-1 \\ \Rightarrow9y^1-y^0=9\cdot(-8)-1=-72-1=-73 \\ \Rightarrow9y^1-y^0=-73 \end{gathered}[/tex]Then, the answer is -73, the second option
Which degree polynomials have ends that head off in opposite directions?Even degree polynomialsOdd degree polynomialsEven and odd degree polynomialsNone of the choices
Answer:
Odd degree polynomials
Explanation:
In order to determine what degree polynomials have ends that head off in opposite directions, recall the rules of the leading coefficient test.
When using the Leading coefficient test, the following rule applies:
• When the ,degree is odd, and the leading coefficient is positive, the graph ,falls to the left and rises to the right.
,• When the ,degree is odd, and the leading coefficient is negative, ,the graph rises to the left and falls to the right.
,• When the degree is even and the leading coefficient is positive, the graph rises to the left and right.
,• When the degree is even and the leading coefficient is negative, the graph falls to the left and right.
Thus, we see that when the degree of the polynomial is odd, the ends head off in opposite directions.
The second option is correct.
#4 Write an equation, in slope-intercept form, for a line that passes through (3, 4) and has a y-intercept of -8.
[tex](\stackrel{x_1}{3}~,~\stackrel{y_1}{4})\hspace{10em} \stackrel{slope}{m} ~=~ - 8 \\\\\\ \begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-\stackrel{y_1}{4}=\stackrel{m}{- 8}(x-\stackrel{x_1}{3}) \\\\\\ y-4=-8x+24\implies {\Large \begin{array}{llll} y=-8x+28 \end{array}}[/tex]
Find the rational function which represents the graph. If you could help with both sections that would be amazing
SOLUTION
Given the question in the image, the following are the solution steps to answer the question.
STEP 1: Write the given points on the graph
[tex]\begin{gathered} \text{ Points are given in the form of }(x,y) \\ \therefore\text{ points are:} \\ (x_1,y_1)=(2,0) \\ (x_2,y_2)=(0,-2) \end{gathered}[/tex]STEP 2: Write the slope-intercept form of the equation of a line
[tex]\begin{gathered} y=mx+b \\ \text{where m is the slope and b is the y-intercept} \end{gathered}[/tex]STEP 3: Write the formula to get the equation of a line using two given points
[tex](y-y_1)=m(x-x_1)[/tex]STEP 4: We use the given points to get the slope
[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]STEP 5: Substitute the given points into the formula in step 4 to get the slope
[tex]m=\frac{-2-0}{0-2}=\frac{-2}{-2}=1[/tex]STEP 6: Since we have a slope and two points, we use the formula in step 3 to get the function that represents the line
[tex]\begin{gathered} (y-y_1)=m(x-x_1) \\ U\sin g\text{ point }(2,0) \\ (y-0)=1(x-2) \\ y=1(x-2) \\ y=x-2 \end{gathered}[/tex]STEP 7: We get the rational function of the line using the given hole
[tex]\begin{gathered} \text{hole}=(5,3) \\ \text{equation of line }\Rightarrow y=x-2 \\ \\ To\text{ get the rational function, we write the function of each coordinate that makes it undefined} \\ (5,3)\Rightarrow x=5\Rightarrow x-5 \\ (5,3)\Rightarrow y=3\Rightarrow y-3 \\ We\text{ divide the equation of the line in step 6 by the expressions above} \\ \text{Hence, the rational function is given as:} \\ \frac{y}{y-3}=\frac{x-2}{x-5} \end{gathered}[/tex]Hence, the rational function representing the line with the given hole is:
[tex]\frac{y}{y-3}=\frac{x-2}{x-5}[/tex]The function f(x) = 2 * (2) ^ x was replaced with f(x) + k resulting in the function graphed below
PLEASE HELP WILL MARK BEAINLY
Example:
f(x) = (x - 1)2, f(x) = 8x , f(x) = x2 - x , f(x) = 7. Summary: From the given functions, f(x) = 7 is the even function.
an article in a psychology journal journal claims that young students who play a musical instrument tend to have higher test scores on state math exams.
5. Jenny has $65 in her checking account. She bought 9 equally priced DVDs and paid with acheck. Her new account balance is $32. How much was each DVD?
This implies that, the money spent on the 9 equally priced DVDs is:
[tex]\text{Money Spent on the 9 equally priced DVDs= 65 -32 =\$3}3[/tex]Therefore, the amount spent on each DVD is:
[tex]\frac{33}{9}=\text{ \$3.67}[/tex]Hence, each DVD costs $3.67
how many zeros does the product of 25^5 ×150^4 ×2008 ^3 end with?
Answer:
13 trailing zeros
Explanation:
Our goal is to rewrite the expression such that we have 10 as a factor. Then the power of 10 will give us the number of trailing zeros.
The product can be rewritten as
[tex](5^2)^5\cdot(2\cdot3\cdot25)^4\cdot(2^3\cdot251)^3[/tex]which can further be rewritten as
[tex]5^{10}\cdot(2^4)(3^4)(5^8)\cdot2^9\cdot251^3[/tex][tex]\Rightarrow2^{13}\cdot3^4\cdot5^{18}\cdot251^3[/tex][tex]10^{13}\cdot3^4\cdot5^6\cdot251^3[/tex]We see that by rewriting our expression 10 appears with a power of 13; therefore, the expression has 13 trailing zeros.
Which of the following expressions can be used to find PQ? A. 12 • sin 42°B. 12 • cos 42°C. 12/cos42°D. 12/sin42°
PQ is hypotenuse of the triangle
pR is the opposite side
so,
it will come like
sin 42=12/PQ
PQ=12/sin 42
so the answer is D
Raj worked 51 hours last week. He earns $ 14.02 per hour plus overtime, at theusual rate, for hours exceeding 40 hours. What is his gross pay? Round answer totwo decimal places. If answer does not have two decimal places then include zeroso that it does. For the units use a word not a symbol. Be sure to attach your workto this question in order to receive credit for your answer.Your Answer:units:
Given:
Raj worked 51 hours last week.
He earns $ 14.02 per hour
[tex]\begin{gathered} \text{Gross salary=14.02}\times51 \\ =\text{ \$715 .02} \end{gathered}[/tex]Gross salary is 715.02 dollar per week
During a football match, 18 boys are grouped into 2 teams
How many boys are there in each team?
help mee pleasee!!
thank you <3
An equation that models the number of people employed in some country as medical assistant in the last year x is y = 359 + 14.35x
In this question, we have been given the number of people employed in some country as medical assistant.
We need to write an equation that models the number of people employed in some country as medical assistant in the last year x.
the number of people employed in some country as medical assistant:
in 2004 = 359 thousand
and by 2014 this number is expected to be 560 thousand.
We find the rate of employment.
Consider (x1, y1) = (0, 359) and (x2, y2) = (14, 560)
m = (560 - 359)/(14 - 0)
m = 201/14
m = 14.35
We have been given the line must pass through points (0, 359) and (14, 560)
And, we get the y-intercept c = 359
with slope m = 14.35 and y-intercept c = 359, the equation of the line would be,
y = 14.35x + 359
Therefore, an equation that models the number of people employed in some country as medical assistant in the last year x is y = 359 + 14.35x
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The value of an industrial embroidery machine is decreasing according to the function defined byV(t) = 10,890(3)–0.21where tis the number of years since the machine was purchased. What does the y-intercept represent?OA. the value of the machine after 3 yearsB.the amount of time it takes for the value of the machine to reach zeroOC.the original value of the machineODthe rate at which the value of the machine depreciates21 Edimentum All rights reserved
Solution
We have the following expression:
[tex]V(t)=10890(3)^{-0.2t}[/tex]for this case the y intercept is given when t=0 so we have:
[tex]V(0)=10890(3)^{-0.2\cdot0}=10890[/tex]And this value represent the following:
C. the original value of the machine
Since thats the starting value without depreciation
Use properties to rewrite the given equation. Which equations have the same solution as 2.3p – 10.1 = 6.5p – 4 – 0.01p? Select two options.
The equations that have the same solutions as 2.3p – 10.1 = 6.5p – 4 – 0.01p are as follows:
2.3p – 10.1 = 6.49p - 4230p - 1010 = 650p - 400 - pHow to find same solution equation?Systems of equations that have the same solution are called equivalent systems.
Therefore, the equation that have the same solution as 2.3p – 10.1 = 6.5p – 4 – 0.01p can be calculated as follows:
Hence, let's find the solution of this :
2.3p – 10.1 = 6.5p – 4 – 0.01p
Simplifying the above equation by collecting like terms gives;
2.3p – 10.1 = 6.5p – 4 – 0.01p
2.3p – 10.1 = 6.5p – 0.01p - 4
Therefore, one of the equivalent solution is as follows:
2.3p – 10.1 = 6.49p - 4
Both sides of an equation will remain equal, when both sides are
multiplied by the same value.
Therefore, let's multiply both sides by 100,
2.3p – 10.1 = 6.5p – 4 – 0.01p
100(2.3p – 10.1) = 100(6.5p – 4 – 0.01p)
230p - 1010 = 650p - 400 - p
Therefore, another equivalent solution is 230p - 1010 = 650p - 400 - p
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.
91,375 ÷ 10 power of 5
9.1375
913.75
91.375
0.91375
Answer:
I'm not sure the right equation to used for this problem. can someone help me please.
Line A has a slope of −3 . Line B has a slope of 4. Line C has a slope of 2.
Which line is closest to being horizontal?
Line A
Line B
Line C
I don't know.
Line C is closest to being horizontal.
Given,
Line A has a slope of −3.
Line B has a slope of 4.
Line C has a slope of 2.
To find the which line is closest to being horizontal?
Now, According to the question:
Slope of line A (m1) = -3
Slope of line B (m2) = 4
Slope of line C (m3) = 2
Slope of horizontal line = 0
Closest to being horizontal is given by l m l
For line A = l-3 l = 3
For line B = l4l = 4
For line C = l2l = 2
As 2 is smaller it is closest to horizontal
Hence, Line C is closest to being horizontal.
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BRAINLIEST (statistics) (please help fast)
As an introduction to probability, a student is asked to roll a fair, six-sided number cube seven times. The results of those seven rolls are shown below.
1, 4, 4, 4, 4, 6, 5
What is the IQR of the data?
1
1.53
2
5
Step-by-step explanation:
first find the median (middle value) of the lower and upper half of the data. these values are quartile 1 (Q1) and quartile 3 (Q3). the IQR is the difference between Q3 and Q1.
first sort the data low to high.
the median of the whole data set is 4.
1, 4, 4, 4, 4, 5, 6
the lower half is
1, 4, 4
the upper half is
4, 5, 6
the median of the lower half is 4
1, 4, 4
the median of the upper half is 5
4, 5, 6
the IQR is then
5 - 4 = 1
Answer:
A) 1Step-by-step explanation:
Given data:
1, 4, 4, 4, 4, 6, 5We need to find the IQR of data.
What is the IQR:
IQR is the difference of medians of upper and lower halves of the data.or
IQR = Q3 - Q1Find Q3 and Q1:
Q3 = 5, since upper half consists of 4, 5, 6.Q1 = 4, since lower half consists of 1, 4, 4.Find the IQR:
IGR = 5 - 4 = 1Correct choice is A
fill in the blanks please
Answer:
2) Consecutive interior angles are supplementary.
5) Division Property of Equality
How do you write 4,260 in scientific notation?x 10Submit
4.26 × 10³
Explanation:To write 4260 in scientific notation, we would move the point from right to left starting at 0 to the place in between 4 and 2
The number of movement = 3
[tex]4260\text{ = 4.260}\times10^{n\text{ umber of movement}}[/tex][tex]\begin{gathered} 4260\text{ = 4.260}\times10^3 \\ =\text{ 4.26}\times10^3 \end{gathered}[/tex]What is the equation of the line that passes through the point ( − 8 , − 3 ) that is parallel to the line 5 x − 8 y = − 40 ? Write the equation in slope-intercept form.
- 10> - 11 1/5 means that - 11.33 is located to the left of- 7.40 on the number line.
On the number line, the numbers increase from left to right like that
-5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5
Then -10.33 will come before -7.40 like that
-11, -10, -9, -8, -7, -6
since -11 is left -7, then -11.33 will be left -7.40
It is YES
Which law is used to come to the stated conclusion? If no conclusion can be drawn, answer "no conclusion". If Rae is the driver today then Maria is the driver tomorrow. Annis the driver today.
DEFINITIONS:
1) Law of Contrapositive: This law reverses the conclusion and the hypothesis of the inverse of the conditional statement. This is expressed as:
[tex]\begin{gathered} \text{Original Statement: If p, then q} \\ \text{Contrapositive Statement: If not q, then not p} \end{gathered}[/tex]2) Law of Detachment: This law states that if the conditional statement is true, and the hypothesis is true, then the conclusion is true as well. This is expressed as:
[tex]\begin{gathered} 1)\text{ If p, then q} \\ 2)\text{ p} \\ \text{Then},\text{ statement q is true} \end{gathered}[/tex]3) Law of Syllogism: This law is explained as:
[tex]\begin{gathered} 1)\text{ If p, then q} \\ 2)\text{ If q, then r} \\ \text{Then,} \\ 3)\text{ If p, then r is true} \end{gathered}[/tex]QUESTION:
The statements provided can be separated as shown below:
[tex]\begin{gathered} 1)\text{ p = Ray is the driver today} \\ 2)\text{ q = Maria is the driver tomorrow} \\ 3)\text{ r = Ann is the driver today} \end{gathered}[/tex]The question states that
[tex]\text{If p, then q}[/tex]and
[tex]r\text{ is true}[/tex]This conclusion cannot be proved using any of the rules above.
Therefore, no conclusion can be drawn on the truth of the statement.
The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 259.1 and a standard deviation of 68.2. (All units are 1000 cells/µl.) Using the empirical
rule, find each approximate percentage below.
a. What is the approximate percentage of women with platelet counts within 3 standard deviations of the mean, or between 54.5 and 463.77
b. What is the approximate percentage of women with platelet counts between 122.7 and 395.5?
a. Approximately % of women in this group have platelet counts within 3 standard deviations of the mean, or between 54.5 and 463.7
(Type an integer or a decimal. Do not round.)
PLEASE HELP ASAP
Using the Empirical Rule, it is found that:
a. Approximately 99.7% of women in this group have platelet counts within 3 standard deviations of the mean, or between 54.5 and 463.7.
b. Approximately 95% of women in this group have platelet counts between 122.7 and 395.5.
What does the Empirical Rule state?The Empirical Rule states that, for a normally distributed random variable, the symmetric distribution of scores is given as follows:
The percentage of scores within one standard deviation of the mean of the distribution is of 68%.The percentage of scores within two standard deviations of the mean of the distribution is of 95%.The percentage of scores within three standard deviations of the mean off the distribution is of 99.7%.Hence for item a the percentage is of 99.7%, as the measures are within 3 standard deviations of the mean.
In item b, the measures are within two standard deviations of the mean, as:
259.1 - 2 x 68.2 = 122.7.259.1 + 2 x 68.2 = 395.5.Hence the percentage is of 95.5%.
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Please help us with this math problem so we can sleep to night
In this case, we'll have to carry out several steps to find the solution.
Step 01:
Data:
Jupiter's mass = 1.89 x 10^27 kg
Moon's mass = 7 x 10^22 kg
Step 02:
We must analyze the problem to find the solution.
[tex]\frac{j\text{ mass}}{m\text{ mass}}=\frac{1.89\cdot10^{27}}{7\cdot10^{22}}=0.27\cdot10^5[/tex]0.27x10^5 = 27000
The answer is:
The mass of Jupiter is 27,000 times the mass of the moon.
use the volume of the given sphere to find x
umm ciao anyways.........................................
[please help!!!]
The manager of a pizza restaurant recorded the total number of pizzas delivered after x weeks in this table. Which statement is true?
A. There was an increase of 83.5 pizzas each week from week 4 to week 6.
B. There was an increase of 34.5 pizzas each week from week 4 to week 6.
C. There was an increase of 50 pizzas each week from week 4 to week 6.
D. There was an increase of 28 pizzas each week from week 4 to week 6.
Answer:
the answer is a
Step-by-step explanation:
to see which answer is true, we must find the average of the difference between weeks 4-6
356 - 278 = 78
445 - 356 = 89
Now, find the average
89 + 78 = 167
167/2 = 83.5
therefore, answer A is true
Robbie wants to plot the .four, five on a coordinate plane which statement describes how to plot this point starting from the origin
We were told in the question that Robbie wants to plot the point (4, 5) on a coordinate plane. we are to determine from the option the statement that describes how to plot it.
Plotting on a coordinate plane already gives us the idea of x and y axis which is the vertical and the horizontal.
We were given positive values for both points which implies that:
Since 4 is the x-axis and positive and 5 is y-axis and also positive. We can draw a statement that:
We move 4 units to the right and then 5 units up.
With this, the correct option is C.
Use the four-step procedure for solving the following variation problem.The height that a ball bounces varies directly as the height from which it was dropped. A tennis ball dropped from 17 inches bounces 11.9 inches. From what height was the tennis ball dropped if it bounces 42 inches?The tennis ball needs to be dropped from the height of ?that it bounces 42 inches.(Type an integer or a decimal.)
If we drop a ball from 60 inches height it bounces 42 iches.
What is Ratio?A ratio is an ordered pair of numbers a and b, written a / b where b does not equal 0.
Given,
The height that a ball bounces varies directly as the height from which it was dropped.
A tennis ball dropped from 17 inches bounces 11.9 inches.
We need to find from which height if we drop a ball bounces 42 iches.
Let us consider x as the unknown height
Let us form a equation by the given data
17/11.9=x/42
Apply cross multiplication
17×42=11.9x
714=11.9x
Divide both sides by 11.9
60=x
Hence if we drop a ball from 60 inches height it bounces 42 inches.
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Find the area and the circumference of a circle with diameter 8cmUse 3.14 for n , and do not round your answer
ANSWER:
Circumference of the circle is 25.12 centimeters
Area of the circle is 50.24 square centimeters
STEP-BY-STEP EXPLANATION:
We have that the formula for the circumference and the area are the following:
[tex]\begin{gathered} c=2\cdot\pi\cdot r \\ A=\pi\cdot r^2 \end{gathered}[/tex]The radius is equivalent to half the diameter, therefore, we replace:
[tex]\begin{gathered} r=\frac{d}{2}=\frac{8}{2}=4 \\ \text{ replacing} \\ c=2\cdot3.14\cdot4=25.12\text{ cm} \\ A=3.14\cdot4^2=50.24cm^2 \end{gathered}[/tex]the circumference of the circle is 25.12 cm and the area is equal to 50.24 square centimeters
