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just olya [345]
3 years ago
7

Which expression represents the calculation "subtract 30 from 40, then multiply by 4

Mathematics
1 answer:
Rzqust [24]3 years ago
3 0

4( 40 - 30)

subtract 30 from 40 is expressed as 40 - 30

then multiply by 4 is expressed as 4 × (40 - 30) or 4(40 - 30) = 40


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(5a^2+6a+2)-(7a^2-7a-5)
krok68 [10]

For this case we must simplify the following expression:(5a^ 2 + 6a + 2) - (7a^ 2-7a-5) =

We eliminate the parentheses taking into account that:

- * + = -\\- * - = +

So:

5a ^ 2 + 6a + 2-7a ^ 2 + 7a + 5 =

We add similar terms taking into account that:

Equal signs are added and the same sign is placed.

Different signs are subtracted and the major sign is placed.

5a ^ 2-7a^2 + 6a + 7a +2 +5 =\\-2a ^ 2 + 13a + 7

Answer:

-2a ^ 2 + 13a + 7

8 0
3 years ago
By hitting a target, Juanita can score 16, 17, 23, 26, 29 or 40 points with each arrow. What is the fewest arrows she can shoot
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3 0
2 years ago
5x-15=50 (Show your work)
Zigmanuir [339]
5x - 15 = 50
Add 15 to both sides
5x = 65
Divide both sides by 5
x = 13

Hope this helped :)
3 0
3 years ago
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