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vesna_86 [32]
3 years ago
11

Find the value of 3u-8 given that -7u + 9=2

Mathematics
2 answers:
bulgar [2K]3 years ago
8 0

Answer:

-5

Step-by-step explanation:

-7u+9=2

-7u=2-9

-7u=-7

7u=7

u=7/7

u=1

3(1)-8=3-8=-5

eduard3 years ago
8 0
Step 1: Solve for u using the equation -7u+9=2


-7u+9=2
-9 -9
_________
-7u=-7
__ __
-7 -7
_________
U=-1


Step 2: Substitute u into 3u-8

3u-8
3(-1) -8
-3 -8
-11


The value of 3u-8 is -11


Hope this helps comment below for more questions :)
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Answer:

The Magazines each costed $8.30 and the books cost $13.80 for the amount of $41.50. and the 2 magazines and 5 books for $42.25 the 2 magazines is $21.12 for each and $8.45 for each book.

Step-by-step explanation:I got the answers by taking the total cost and taking the number of books or if it was a a magazine and I would divide it by lets just say you have 42.25 dollars you would divide that by 3 and you would do it for every item with the total cost.

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Answer:

3^{75}.

Step-by-step explanation:

We have been an division problem: \frac{45^{45}*15^{15}}{75^{30}}.

We will simplify our division problem using rules of exponents.

Using product rule of exponents (a*b)^n=a^n*b^n we can write:

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75^{30}=(15*5)^{30}=15^{30}*5^{30}

Substituting these values in our division problem we will get,

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Using power rule of exponents a^n*a^m=a^{n+m} we will get,

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Using product rule of exponents (a*b)^n=a^n*b^n we will get,

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Using power rule of exponents a^n*a^m=a^{n+m} we will get,

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Using quotient rule of exponent \frac{a^m}{a^n}=a^{m-n} we will get,

\frac{3^{105}}{3^{30}}=3^{105-30}

3^{105-30}=3^{75}

Therefore, our resulting quotient will be 3^{75}.

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Answer:

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Step-by-step explanation:

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