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Ivanshal [37]
3 years ago
11

Write a mathematical expression for: the sum of twice a number n and 20.

Mathematics
2 answers:
navik [9.2K]3 years ago
8 0
2n + 20

Twice means to multiply by two
Sum means to add
faust18 [17]3 years ago
5 0
I belive is B hope that helped
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Inequality for thirty is no greater than the sum of a number and -8
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Answer:

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Step-by-step explanation:

The wording no greater then lets us know that  the inequality is less than or equal to. The wording sum means the its adding the number and negative 8. Lets have x represent the unknown number.

30≤-8+x

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Step-by-step explanation:

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3 years ago
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Help!! <br>2x+3 (x-4)=x-20
prohojiy [21]
Remember  you can do anything to an equation as long as you do it to both sides

2x+3(x-4)=x-20
first distribute
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5x-12=x-20
minus x both sides
4x-12=-20
add 12 to both sides
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divide both sides by 4
x=-2
8 0
3 years ago
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