3 years ago

Definition for compatible numbers

1 answer:

8 0

When estimating, compatible numbers are numbers that are close in value to the actual numbers, and which make it easy to do mental arithmetic.

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What is the value of x in this proportion?

astra-53 [7]

Answer:

(a) x=−20 1/2

Step-by-step explanation:

Multiply by the product of the denominators and solve the resulting linear equation in the usual way.

$\dfrac{2}{7}=\dfrac{-5}{x+3}\\\\2(x+3)=-5(7)\qquad\text{multiply by $7(x+3)$}\\\\2x+6=-35\qquad\text{simplify}\\\\2x=-41\qquad\text{subtract 6}\\\\\boxed{x=-20\dfrac{1}{2}}\qquad\text{divide by 2}$

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1 year ago

Lara read for 40 minutes. She read 4 times longer than Ryan. Which equation could be used to calculate the number of minutes tha

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2 years ago

A right triangle has side lengths 7, 24, and 25 as shown below.

ddd [48]

Answer:

Steps below

Step-by-step explanation:

The value depends on which angle is B, suppose ∠B is the opposite angle of side length 7

sin B = 7/25

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if ∠B opposite to side length of 24

sin B = 24/25

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tan B = 24/7

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2 years ago

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2 years ago

64 ft of rope weighs 20 pounds 28 ft of rope weighs x pounds

castortr0y [4]

Answer

89.6

Step-by-step explanation:

Each foot of rope weighs 3.2 so then mutiplied 3.2 by 28 and got that

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2 years ago