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2 years ago

The table shows the time it took a group of students to complete a puzzle

Mathematics

2 answers:

mash [69]2 years ago

8 0

Answer:

a. 17 b. 16/24

Step-by-step explanation:

Studentka2010 [4]2 years ago

5 0

Answer:

a. 17 b. 16/24

Step-by-step explanation:

a. Find the midpoints of each class interval which is:

7.5 x 2 = 15

12.5 x 9 = 112.5

17.5 x 5 = 87.5

22.5 x 5 = 112.5

27.5 x 3 = 82.5

Add all of these up to give 410

Add up the total of the frequency column which is 24

410 / 24 = 17.0833.....

Rounded to 2 significant figures, the answer is 17

b. Add together all the people under 20 which totals to 16 and put this over the total of 24 to give the fraction 16/24

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Seetha drove to work at 30 miles per hour. How fast would she need to drive home for the average speed for her round trip commut

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Answer:

Step-by-step explanation: Total distance = 60 miles

Total time = 30 / 30 + 30/60 = 3/2

Avg. speed = 40.

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2 years ago

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2 years ago

Two shops sell the same phone. In both shops it is £196. One shop increases the price by 17.5%. The other shop increases the pri

Diano4ka-milaya [45]

Step-by-step explanation:

the 1st shop=196-(17.5/100×196)

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2 years ago

Evaluate. −27/125−−−−√3 A.-9/25 B.-3/5 C.9/25 D.3/5

Vladimir79 [104]

$\sqrt[3]{\dfrac{-27}{125}} = -\sqrt[3]{\left(\dfrac{3}{5}\right)^{3}}=\dfrac{-3}{5}$

The appropriate choice appears to be ...
B. -3/5

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2 years ago

Read 2 more answers

A bulletin board measuring 28 dm long was divided among three subject areas in the ratio 2:2:3. How much space was alothed for e

Sphinxa [80]

Answer: Space was alloted for each subject is 8 dm, 8 dm, 12 dm.

Explanation:

Since we have given the length of bulletin board =28 dm

Let the share of three subject areas be 2x,2x,3x

According to question,

$2x+2x+3x=28\\7x=28\\x=\frac{28}{7}\\x=4dm$

so x=4 dm

Now,

Space was alloted for each subject is given as below:

First subject = $2x=2\times 4=8 dm$

Second subject = $2x=2\times 4=8 dm$

Third subject = $3x=3\times 4=12 dm$

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2 years ago