Question

Plz use the image below

Answer 1

m/n; $80; 7*x; 7 friends

Step-by-step explanation:

(I) $x=$m/n

(II) $x=400/5=$80

(III) $m=7*x

(IV) n=140/20=7

Answer 2

Part (i)

Answer: m/n

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Step-by-step explanation:

You divide the total bill over the number of people at the dinner. This leads to the quotient and the amount each person pays (each person pays the same amount).

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Part (ii)

Answer: 80 dollars

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Step-by-step explanation:

Plug in m = 400 and n = 5 to get

m/n = 400/5 = 80

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Part (iii)

Answer: m = 7x

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Step-by-step explanation:

x = m/n

x = m/7

7x = m ... multiply both sides by 7

m = 7x

The total bill is 7 times of what each person paid.

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Part (iv)

Answer: 7 people

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Step-by-step explanation:

x = 20 is the amount each person paid

m = 140 is the total bill

n = number of people who went to dinner

x = m/n

20 = 140/n

20n = 140 ..... multiply both sides by n

n = 140/20 ..... divide both sides by 20

n = 7

Seven friends went to do dinner, splitting a $140 bill, paying $20 each