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Mrrafil [7]
2 years ago
6

A triangle has the coordinates

Mathematics
1 answer:
fiasKO [112]2 years ago
8 0

Answer:

coordinates of its image

A' = ( -4, -1)

B' =( -3, -3)

C' = ( 0, 2)

Step-by-step explanation:

Reflect in y-axis means mirror it's points in the y -axis.

This means that the x coordinate of each point, changes only. Any mirrored point in the y-axis, will change only, by multiplying the x-coordinate by -1.

(Remember, zero multiplied by -1 remains 0).

Given are these points A, B, and C.

A = (4, -1)

B = (3,-3)

C = (0, 2)

After mirroring in the y- axis you get:

A' = ( -4, -1)

B' =( -3, -3)

C' = ( 0, 2)

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A human resources representative claims that the proportion of employees earning more than $50,000 is less than 40%. To test thi
bearhunter [10]

Answer:

The statistic for this case would be:

z=\frac{\hat p -p_o}{\sqrt{\frac{\hat p(1-\hat p)}{n}}}

And replacing we got:

z= \frac{0.436-0.4}{\sqrt{\frac{0.436*(1-0.436)}{700}}}= 1.92

Step-by-step explanation:

For this case we have the following info:

n =700 represent the sample size

X= 305 represent the number of employees that earn more than 50000

\hat p=\frac{305}{700}= 0.436

We want to test the following hypothesis:

Nul hyp. p \leq 0.4

Alternative hyp : p>0.4

The statistic for this case would be:

z=\frac{\hat p -p_o}{\sqrt{\frac{\hat p(1-\hat p)}{n}}}

And replacing we got:

z= \frac{0.436-0.4}{\sqrt{\frac{0.436*(1-0.436)}{700}}}= 1.92

And the p value would be given by:

p_v = P(z>1.922)= 0.0274

4 0
3 years ago
Shiela either walks or cycles to school the probability that she walks is 0.65 if she walks the probability that she is late is
Serjik [45]

Answer:

0.705

Step-by-step explanation:

Data:

walks=0.65 and is late=0.4;is not late=0.6

cycles=0.35 and is late=0.1;is not late=0.9

The probability of sheila walking and not being late:  

0.65 x 0.6=0.39  

AND probability of being not late and cycling:

0.35 x 0.9=0.315

therefore,the probability of sheila walking or cycling and still not being late:

0.39+0.315=0.705

3 0
3 years ago
Denise calculated the missing side length of one of these triangles using the Pythagorean Theorem. Which triangle is it? (4 poin
Ad libitum [116K]

Answer:

D

Step-by-step explanation:

7 0
2 years ago
The Mean of 5 numbers is 20 the median is 23 what might the number be
valentina_108 [34]

13, 15, 23, 24, 25

Median is 23 because it comes in middle of five numbers

To find the mean, add up the values in the data set and then divide by the number of values that you added

if we sum these numbers we get 100 then divide it by 5 we get

100/5 = 20

7 0
2 years ago
Read 2 more answers
Solve each system using substitution.<br> 4. y = 1/x + 4<br> x-y=8
liubo4ka [24]

Answer:

y=\frac{33}{8}

Step-by-step explanation:

y=\frac{1}{8} +4

Use the slope-intercept form to find the slope and y-intercept.

Slope:  

0

y-intercept:  

\frac{33}{8}

To get the answer i used a graph

then i tried just evaluating the equation

Reduce the expression, if possible, by cancelling the common factors.

y=\frac{33}{8}

I got the same answer so i believe this should be your Answer

<u>Hope this helps</u>

7 0
3 years ago
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