The type of transformation PQRS undergoes is a . If vertex Q is at (-4, -5), then vertex Q′ is at ?

Mathematics

1 answer:

MissTica3 years ago

8 0

Answer:

(-4, -5) it gives the answer in the question

Step-by-step explanation:

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I need help with this question

alex41 [277]

Since the triangle is cut in half, I’m guessing it’s 22.5

7 0

3 years ago

Solve and show work for this problem

il63 [147K]

The two equations are:

x = 5y - 18 (vertically opposite angles are equal)

x + y = 180 (Alternate angles , adjacent angles on a straight line)

x = 5y - 18 ---------------- (1)
x + y = 180 ---------------- (2)

From (2):
x + y = 180
y = 180 - x ---------------- Sub into (1)

x = 5(180 - x) - 18
x = 900 - 5x - 18
6x = 882
x = 147 ---------------- Sub into (2)

x = 147
y = 180 - 147 = 33

Answer: x = 147, y = 33

4 0

3 years ago

Can someone please check my answer? thank you :)

Arisa [49]

It's right i just took this test and it is right good job mark me brsinliest ole

4 0

3 years ago

You wish to compute the 99% confidence interval for the population proportion. How large a sample should you draw to ensure that

Nataly_w [17]

Answer:

$n=\frac{0.5(1-0.5)}{(\frac{0.13}{2.58})^2}=98.47$

And rounded up we have that n=99

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

Solution to the problem

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 99% of confidence, our significance level would be given by $\alpha=1-0.99=0.01$ and $\alpha/2 =0.005$ . And the critical value would be given by: