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2 years ago

Use the number line to show and explain why 4/10 ÷ 2 and 4/10 × 1/2 both equal 2/10

Mathematics

1 answer:

Vesna [10]2 years ago

4 0

Step-by-step explanation:

When you divide by a number, you basically are multiplying by the reciprocal

The reciprocal of 2 is 1/2

4/10 ÷ 2 = 4/10 × 1/2 = 2/10

4/10 × 1/2 = 2/10

Using a number line,

Start at 4/10 and move down by 2 until you reach 0

Start at 4/10 and move up by 1/2 from 0 until you reach 4/10

(Count the number of humps)

Both will be the same

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Answer:

your answer should be 7 or 7.5 minutes.

Step-by-step explanation:

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2 years ago

Heights of 10-year-olds, regardless of gender, closely follow a normal distribution with a mean of 55 inches and a standard devi

Svetllana [295]

Answer:

Step-by-step explanation:

Given that Heights of 10-year-olds, regardless of gender, closely follow a normal distribution with a mean of 55 inches and a standard deviation of 6 inches.

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Z score would be $\frac{x-55}{6}$