How do I solve 12x+7y=3100 without guessing and checking

Mr. Swanson bought a package of 10 disposable razors for $6.30. He found that each razor lasted for 1 week. What was the cost per day

3p+4q = 10 5p-4q = - 26 Solve the system of equations using elimination. Write your answer as (p, q).

Consider the equations: y = 2x + 3 and y = 3x + 3 Solve the system of equations by completing the table to find an ordered pair that satisfies both equations. A) (-1,1) (0,3) (1.5) D) (3.9)

Which zero is significant in the number 50,540? what is the other zero called?

A 6 inch personal pizza has 590 calories, with 240 of those from fat. A 16 inch pizza is cut into 8 slices. Estimate the number of calories in one slice of a 16 inch pizza

If Jaalan takes a number of marbles he has and multiplies it by 5 and then subtracts 10, he get 275. Write an equation and solve to see how many marbles Jaalan has?

The quotient of 100 and the quantity of 25 times 3?

What's the perimeter of the polygon shown above? 116cm 136 cm 141 cm 131 cm 43 cm

Write an algebraic expression with the constant 7 and the variable and Y

Add [1 - 4] [3 5] + [-2 6] [-2 4]