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Misha Larkins [42]

2 years ago

15

look at the simultaneous equations: x+y=a and 2x+y=b. write an expression for x in terms of a and b. write and expression for y

in terms of a and b, giving your answer as simply as possible

1 answer:

jolli1 [7]2 years ago

7 0

I hope this helps you :)

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irga5000 [103]

Answer:

A) The width is 12 cm; the average time is 3 minutes

Step-by-step explanation:

$\frac{5}{3}= \frac{20}{y}$

Cross multiply.

5 × y = 3 × 20

5y = 60

5y ÷ 5 = 60 ÷ 5

y = 12

The width is 12 cm. Moving onto the time.

$\frac{12}{4} =\frac{y}{1}$

Cross multiply.

4 × y = 12 × 1

4y = 12

4y ÷ 4 = 12 ÷ 4

y = 3

The time is 3 minutes.

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Varvara68 [4.7K]

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A bag of flour weighed 2.25 kilograms 0.725 kilograms are used in a recipe how many kilograms of flour are left

Mrac [35]

Hello!

You subtract the amount of flour you started with by the amount you used

2.250 - 0.725 = 1.525

The answer is 1.525 kilograms

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