# algebra

collect like terms and then arrange in descending order.
8x^5 - 7x^9-7x^5+ 8x^9

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1. Like terms are terms with the same variables raised to the same powers.

8x^5 - 7x^9-7x^5+ 8x^9
First groupe like terms and arrange in descending order
= 8x^9-7x^9 + 8x^5-7x^5
Now the simplification
=x^9 + x^5

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2. THE total revenue is the amount of money tsken by a business. Appliance firm determines that when it sells y washing machine, the total revenue R in dollars is given by the polynomial R=314.28x-0.1x^2. What is the total revenue from the sale 0f 135 washing machines.

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3. Try to start a new post for a new question. Sometimes these piggy-backed questions get forgotten.

I will answer it this time.

R is a function of x. So substitute 135 for x to get
R=314.28*135 - 0.1*135²

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4. Arrange the given numbers in descending order.

4
5
0.09

4

9

2
4

pls help

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