3 years ago

−3 ( −3b + 5 ) + 9 ( 7b + 5

Mathematics

2 answers:

Arturiano [62]3 years ago

8 0

−3 ( −3b + 5 ) + 9 ( 7b + 5

= 6(12b+5)

adelina 88 [10]3 years ago

8 0

Answer:

72b+30

Step-by-step explanation:

Assuming that the other parentheses is after the 5 and not after 7b:

-3(-3b+5)+9(7b+5)

9b-15+63b+45

72b+30

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If about 1/40 of the earths water is fresh water. About 3/10 of the earths fresh water is ground water. What fraction of the ear

Alex17521 [72]

Answer:

3/400

Step-by-step explanation:

Let w represent earth's water

let f represent fresh water and let g represent ground water

$f = \frac{1}{40}w$

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Therefore, fraction of earth's water,w, that is ground water = 3/400

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3 years ago

Use the Distance Formula to find the distance between D(2, 0) and E(8, 6).

Mazyrski [523]

Answer:

The answer is

<h2> $6 \sqrt{2} \: \: \: or \: \: \: 8.50 \: \: \: \: units$ </h2>

Step-by-step explanation:

The distance between two points can be found by using the formula

$d = \sqrt{ ({x1 - x2})^{2} + ({y1 - y2})^{2} } \\$

where

(x1 , y1) and (x2 , y2) are the points

From the question

The points are D(2, 0) and E(8, 6

The distance between them is

$|DE| = \sqrt{ ({2 - 8})^{2} + ({0 - 6})^{2} } \\ = \sqrt{( { - 6})^{2} + ( { - 6})^{2} } \\ = \sqrt{36 + 36} \\ = \sqrt{72} \: \: \: \: \: \: \: \: \: \: \\ = 6 \sqrt{2} \: \: \: \: \: \: \: \: \: \: \\ = 8.4852813$

We have the final answer as

$6 \sqrt{2} \: \: \: or \: \: \: 8.50 \: \: \: \: units$

Hope this helps you

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