Y=9x+7, y=3x-11 i need to solve theeqayions by substition and show the work

A trucking company makes 50 deliveries in 5 days. How long will it take for 400 deliveries?

The sum of interior angle of a regular polygon is 1980. Find its angle.

81=n-3 (-5+4n Equals what

A researcher reports that the farther college students are from their parents, the more often they communicate with their parents (either by phone or by e-mail). Is this an example of a positive correlation or a negative correlation?

Which of the following represent the area of a rectangle whose length is 5x-3 with is x + 7 A. 5x^2-21 B. 5x^2+9x-21 C. 5x^2+32x-21 D. 5x^2-32x-21

Omar mows lawns for $9.25 an hour. He spends $7.50 on gas for the mower. How much does he make if he works h hours?

1/10 or 200 tables is what?

If 3 times a number minus 2 equals 13, what is the number? A. 4 B. - 6 C. 5 D. 2

What is the radical expression that is equivalent to the expression (35) ^1/4? Enter your answer as a radical. For example, if your answer is 3√14, enter it like this: cuberoot (14)

How many different slope scenarios are there?