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xeze [42]
2 years ago
11

Percentincreaseof 15 and 20

Mathematics
1 answer:
inna [77]2 years ago
8 0
33.3333333% 20-15=5. 5/15=.333333333*100
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Which expression is the best estimate of the product of 7/8and 8 1/10?
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Step-by-step explanation:

product is the result of multiplication

7/8 * 81/10 = 567/80 = 7 7/80 or 7.0875

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Find the slope of the line
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If 3 workers can paint a room in 2 hours, then approximately how long does it take 4 workers to paint the same room? Assume the
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It takes 1.5 hours for 4 workers to paint the same room

<em><u>Solution:</u></em>

Given that 3 workers can paint a room in 2 hours

To find: Time taken for 4 workers to paint the same room

Assume the time needed to paint the room is inversely proportional to the number of worker

time $ \propto \frac{1}{\text { number of workers }}\\\\time =k \times \frac{1}{\text { number of workers }}

Where, "k" is the constant of proportionality

<em><u>3 workers can paint a room in 2 hours</u></em>

Substitute number of workers = 3 and time = 2 hours

time =k \times \frac{1}{\text { number of workers }}\\\\2 = k \times \frac{1}{3}\\\\k = 6

Therefore,

\text {time}=6 \times \frac{1}{\text { number of workers }}

To find time taken for 4 workers to paint the same room, substitute number of workers = 4 in above expression

time = 6 \times \frac{1}{4} = 1.5

Thus it takes 1.5 hours for 4 workers to paint the same room

6 0
3 years ago
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Jordan Michael runs a basketball camp. A group of randomly selected camp participants were asked to give their shirt size. The t
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Answer: 77

Step-by-step explanation:

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Find b: If a = 9 and c = 15<br> С<br> a<br> b
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Answer:

b=12

Step-by-step explanation:

a^2+b^2=c^2

(9×9) + b^2= 15×15

81+ b^2= 225

-81. -81

b^2=144

√. √

b= 12

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3 years ago
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