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sashaice [31]
3 years ago
9

A psychologist collects data on the time, w, in minutes, people walk each day and their scores, t ,on a stress test. The scores

are from 0 to 100, with higher scores meaning more stress. She finds that there is a negative linear association between w and t that is best modeled by the equation t=−2.5w+48.1 .
What is the meaning of 48.1 in this equation?

A. The people who walked each day had an average score of 48.1 on the stress test.

B. The model predicts that a person who does not walk each day will score about 48.1 on the test.

C. The people in the study walked an average of 48.1 minutes each day.

D. For each additional minute spent walking, the model predicts that a person's score on the stress test will go down by about 48.1 points.
Mathematics
2 answers:
photoshop1234 [79]3 years ago
8 0
<span>C. The people in the study walked an average of 48.1 minutes each day.
</span>
poizon [28]3 years ago
8 0
I believe the answer is A because that is the only answer that completes the question correctly.
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Angles U and V are supplementary angles. The ratio of their measures is 7:13 Find the measure of each angle
GREYUIT [131]
If u and v are <span>supplementary angles, then

u+v=180^{\circ}~~~~~\mathbf{(i)}


The ratio of u and v is \dfrac{7}{13}:<span>

\dfrac{u}{v}=\dfrac{7}{13}\\\\\\ u=\dfrac{7v}{13}~~~~\mathbf{(ii)}


Substitute \mathbf{(ii)} into \mathbf{(i)}:

\dfrac{7v}{13}+v=180^{\circ}\\\\\\ \left(\dfrac{7}{13}+1 \right )\cdot v=180^{\circ}\\\\\\ \left(\dfrac{7}{13}+\dfrac{13}{13} \right )\cdot v=180^{\circ}\\\\\\ \dfrac{20}{13}\cdot v=180^{\circ}\\\\\\ v=180^{\circ}\cdot \dfrac{13}{20}\\\\\\ \boxed{\begin{array}{c} v=117^{\circ} \end{array}}


From \mathbf{(i)}, we find the measure of u:

u=180^{\circ}-v\\\\ u=180^{\circ}-117^{\circ}\\\\ \boxed{\begin{array}{c} u=63^{\circ} \end{array}}

</span></span>
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3 years ago
Write the number eighty seven in standard form
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Eighty seven written in standard form would be...
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Good Luck! :)
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Read 2 more answers
Need help ASAP due in 7 minutes <br> Will make you brainlist
Reika [66]

Answer:

A

Step-by-step explanation:

A is the only answer with ordered pairs that have a consistent rate of change, -1/3

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Answer:

multiple and divide are depending on the powers ( sometimes the numbers before the scientific n.)

If the power neg- , it's going down

like this 10^-5 = 1/10^5

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Adding and subtracting are depending on numbers ( If the scientific n. is the same number) .

for example:

3x10^5 + 4x10^5 = (3+4)x10^5 = 7x10^5

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3 years ago
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