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Alik [6]
3 years ago
8

9+9y=9y-9=9(y-1)=9(y+1)=9y+1=1+9y=​

Mathematics
1 answer:
salantis [7]3 years ago
3 0

Answer:

Step-by-step explanation:

9+9y=18y

9y-9= y

9(y-1)=9y−9 simplifed

9(y+1)=9*1y

9y+1=10y

1+9y=10y

sorry if I got some wrong I tried my best.

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Larry buys a tent that is on sale for 25% off the original price. The original price is $80 more than the sale price. What is th
myrzilka [38]

Answer:

The original price of the tent = $320

Step-by-step explanation:

Let the original price be =$ x

Discount offered  = 25% of the orignal price = \frac{25}{100}\times x=0.25\times x =\$ 0.25x

Original price is $80 more than sale price

Discount = Original price - Sale price = $80

So, we have

0.25x=80

We need to solve for x to find original price

Dividing both sides by 0.25

\frac{0.25}{0.25}x=\frac{80}{0.25}\\x=\$320

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3 0
3 years ago
A textbook store sold a combined total of 260 chemistry and physics textbooks in a week. The number of chemistry books sold was
Lynna [10]

Let:

x = Chemistry textbooks sold

y = Physics textbooks sold

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Replace (2) into (1):

\begin{gathered} 3y+y=260 \\ 4y=260 \\ y=\frac{260}{4} \\ y=65 \end{gathered}

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She needs to work 64 hours to earn 1 vacation day.

You get his by dividing 768 by 12.

If correct brainliest please.

Thank you.
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