3 years ago

A pear has 100 calories. A plum has 45 calories. What is the ratio of the calories in a plum to the calories in a pear?

Mathematics

1 answer:

Margaret [11]3 years ago

6 0

Answer. 45:100= 9/20

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Y is directly proportional to x when y=30, x=6

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Step-by-step explanation:

Since, y is directly proportional to x when y=30, x=6

$\therefore \: y \: \alpha \: \: x \\ \therefore \: y = kx ...(1) \\ plug \: y = 30 \: and \: x = 6 \: in \: eq \: (1)\\ 30 = k \times 6 \\ k = \frac{30}{6} \\ k = 5 \\ plug \: k = 5 \: in \: (1) \\ y = 5x....(2) \: (required \: equation) \\ plug \: x = 12 \: in \: eq \: (2) \\ y = 5 \times 12 \\ \huge \red{ \boxed{y = 60}}$