Answer:
10+5x
Step-by-step explanation:
7 and 3 are like terms and 7+3=10
-3x and 8x are also like terms and -3x+8x=5x
Therefore you have 10+5x
Answer:

Step-by-step explanation:
Remember that:

Answer:
b
Step-by-step explanation:
Answer:
The company needs to sell either 30 or 40 items.
Step-by-step explanation:
We are given that the cost for selling <em>x</em> items given by the function:

And the revenue for selling <em>x</em> items is given by:

The profit function is the cost function subtracted from the revenue function:

Substitute and simplify:

To find how many items must be sold in order to obtain a weekly profit of $300, we can let <em>P</em> equal 300 and solve for <em>x</em>. So:

Solve for <em>x</em>. Subtract 300 from both sides:

We can divide both sides by -0.4:

Factor:

Zero Product Property:

Solve for each case:

So, in order to obtain a weekly profit of $300, the company need to sell either 30 <em>or</em> 40 items.
It would be 5850 hope you get it right:)