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garri49 [273]
3 years ago
8

Liz's math test included a survey question asking how many hours students spent studying for the test. The scatter plot below sh

ows the relationship between how many hours students spent studying and their score on the test.
Which of the following is the best estimate of the average score change associated with a 1 hour increase in study time?

Mathematics
1 answer:
soldier1979 [14.2K]3 years ago
8 0

Answer:

B: 20

Step-by-step explanation:

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What is the distance between Harry’s home and his office?
Svetach [21]

Answer:

The distance between Harry’s home and his office? is 15 miles.

Step-by-step explanation:

The speed, distance time formula is:

Speed(s)=\frac{Distance(d)}{Time(t)}

Given:

Speed (<em>s</em>) = 30 miles/hour

Then the relation between distance and time is:

s=\frac{d}{t} \\30=\frac{d}{t}\\d=30t...(i)

If Speed was 60 miles/hour the time taken is (t-\frac{1}{4}) hours.

Then the relation between distance and time is:

s=\frac{d}{t} \\60=\frac{d}{(t-\frac{1}{4}) }\\d=60t-15...(ii)

Use the value of <em>d</em> = 30t in (ii)

<em />d=60t-15\\30t=60t-15\\30t=15\\t=\frac{1}{2} hour<em />

Determine the distance as follows:

d=30t\\=30\times\frac{1}{2} \\=15\ miles

Thus, the distance between Harry’s home and his office? is 15 miles.

5 0
4 years ago
Nancy is a telemarketer who calls 96 people each day. How many people will she call in a 5-day workweek?
ss7ja [257]
The answer is 96*5 =480 so nancy will call 480 people in a 5 day workweek
3 0
3 years ago
A function is created to represent the amount of money you save or spend each day of the week. What restrictions would be made t
ollegr [7]

The range would only include positive integers.

Answer B

6 0
4 years ago
Please solve! I will mark brainliest if correct!
a_sh-v [17]
Hello,

So we can first assign HD videos and classic videos to specific variables, x is HD videos and y is classic videos.

Fiona bought 5 HD videos, and 2 classic videos for 31 dollars.
5x + 2y = 31

Iliana bought 3 HD videos and 5 classic videos for 30 dollars.
3x + 5y = 30

Therefore, the final answer is choice D, 5x + 2y = 31 and 3x + 5y = 30. 
8 0
3 years ago
Read 2 more answers
Find the missing segment.
Bond [772]

Answer:

? = 7.

Step-by-step explanation:

The two triangles are similar because of the AA Theorem.

The larger triangle's side that is equal to 9 + 3 corresponds to the smaller triangle's side length of 9, while the larger triangle's 21 + ? side corresponds to the smaller triangle's 21 side. Now, we can set up a proportion!

\frac{9}{9+3} =\frac{21}{21 + ?}

\frac{9}{12} =\frac{21}{? + 21}

\frac{3}{4} =\frac{21}{? + 21}

\frac{1}{4} =\frac{7}{? + 21}

? + 21 = 7 * 4

? + 21 = 28

? = 28 - 21

? = 7

Hope this helps!

3 0
4 years ago
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