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Anna71 [15]
3 years ago
10

Nancy spent half of her allowance going to the movies. She washed the family car and earned 7 dollars. What is her weekly allowa

nce if she ended with 17 dollars
Mathematics
2 answers:
Aneli [31]3 years ago
7 0

Answer:

$20

Step-by-step explanation:

X= Nancy’s allowance

17=1/2x + 7

Subtract 7 from each side

(10)=(1/2x)

Multiply 2 on each side

Cancel out the 2 in 1/2 and the 2 you multiplied on the right side

X=$20

Sauron [17]3 years ago
6 0
(17-7)*2=weekly allowance
so her weekly allowance is 20
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Step-by-step explanation:

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3 years ago
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Answer:

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Step-by-step explanation:

<u>Exponents Properties</u>

We need to recall the following properties of exponents:

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\displaystyle a^{-x}=\frac{1}{a^x}

We are given the expression:

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We need to express the following expression in terms of n.

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It's necessary to modify the expression to use the given equivalence.

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