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4 years ago

20% of what number is 7

Mathematics

2 answers:

Neko [114]4 years ago

8 0

Answer:

Step-by-step explanation:

7 times 5 is your answer

Bas_tet [7]4 years ago

4 0

(20/100)(number) = 7;
Then, (1/5)(number) = 7;
number is 5 x 7 = 35.

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E varies directly with the square root of C. If E=40 when C=25 find: E when C= 49

tiny-mole [99]

Answer: E = 56

Step-by-step explanation:

E is proportional to √C

To remove proportionality, introduce a constant (k).

E = k × √C

From question,

E = 40 and C = 25

So,

40 = k ×√25

40 = k × 5

k = 8

Now,

C = 49

k = 8

E = ?

E = k√C

E = 8 × √49

E = 8 × 7

E = 56

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4 years ago

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Answer:

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Step-by-step explanation:

Step 1 : Add all the values Up:

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Step 2 : Divide them by the number of items or numbers:

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Step 3: Find the absolute deviations:

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