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galben [10]
3 years ago
15

There are 5 boxes of books in the storeroom each box has 78 books. how many books are there in all

Mathematics
2 answers:
IRISSAK [1]3 years ago
8 0
78 × 5 = 390

there are 390 books in there.

God bless!
boyakko [2]3 years ago
5 0
I belive this would be 390 books in total.
78books*boxes =390
hope this helps!
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Answer:

<em>x = 2</em>

Step-by-step explanation:

<u>Exponential Equations</u>

Solve:

5^{2x-1}+5^{x+1}=250

Separate each exponential:

5^{2x}5^{-1}+5^{x}5^{1}=250

Operating:

\displaystyle \frac{5^{2x}}{5}+5^{x}5=250

Multiplying by 5:

5^{2x}+25\cdot5^x=1250

Rearranging:

5^{2x}+25\cdot5^x-1250=0

Recall that:

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Calling

y=5^{x}:

y^2+25y-1250=0

Factoring:

(y-25)(y+50)=0

There are two possible solutions:

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Since

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y cannot be negative, thus:

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x = 2

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Question 1 of 25
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Answer:

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