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2 years ago

Write a subtraction problem using two fractions with unlike denominators that have a difference of 2/5

Mathematics

1 answer:

timurjin [86]2 years ago

6 0

2/5 = 8/20
8/20 + 5/20 = 13/20

13/20 - 1/4 = 2/5

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Arte-miy333 [17]

Answer:

59°

Step-by-step explanation:

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3 years ago

Ms. Carey grades 4 tests during her lunch. She grades 1/3 of the remainder after school. If she syill5has 16 test to grade after

enot [183]

Answer: 24 tests

Step-by-step explanation:

Ms. Carey graded 1/3 of the tests and still had 16 tests to go.

This means that the 16 tests represent the remaining proportion of the total number of tests:

= 1 - 1/3

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2/3 of the total is equal to 16 tests. Assuming the total is x, the expression would be:

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2 years ago

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Step-by-step explanation:

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3 years ago

A portable CD player costs $48. How much is 25% of the cost

blsea [12.9K]

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7 0

2 years ago

Assume that the heights of boys in a high school basketball tournament are normally distributed, with mean 70 inches and standar

Annette [7]

Answer: 20

Step-by-step explanation:

We assume that the heights of boys in a high school basketball tournament are normally distributed.

Given : Mean height of boys : $\mu=70$ inches.

Standard deviation: $\sigma=2.5$ inches.

Let x denotes the heights of boys in a high school basketball tournament .

Then the probability that a boy is taller than 70 inches will be :-

$P(x> 70)=1-P(x\leq70)\\\\=1-P(\dfrac{x-\mu}{\sigma}\leq\dfrac{70-70}{2.5})\\\\=1-P(z\leq0)=1-0.5=0.5\ \ \text{[by using z-value table]}$

Now, the expected number of boys in a group of 40 who are taller than 70 inches will be :-

$40\times0.5=20$

Hence, the expected number of boys in a group of 40 who are taller than 70 inches=20

6 0

2 years ago