Use the substitute method to solve the system of equations.

3x+y=10

y=2x

A. (-2,4)

B. (2,-4)

C. (2,4)

D. (4,2)

A laptop has a listed price of before tax. If the sales tax rate is, find the total cost of the laptop with sales tax included. Round your answer to the nearest cent, as necessary.

6⁄5 * 1 3⁄4 * 2 3⁄2 =

How do you write 8127 in expanded for as the number multiplied by 10 to the 3rd power?

What is the value of x in the equation 3 minus 2 x = negative 1.5 x? People say the Answer is 6. What's the work to get the answer?

Isaac is trying to solve the problem below. The length of a rectangle is 7 inches greater than the width. The perimeter is 70 inches. What is the width of the rectangle? Isaac solved an equation, and the solution was w = 14.

Is (0, - 1) a solution of - 10x + 4y > - 4?

A running tab dispense is. 15 gallons of water every second how many pints is dispensed after 20 seconds?

A pest control co sprays insecticide around a building of a 180ft by 180ft. The spray cost $.11 per ft, how much did the job cost

After every ninth visit going to a restaurant you receive a free beverage. After every twelfth visit you recieve a free appetizer.

Evaluate the expression for s = 11 and v = 8. (s - v) 2 A. 113 B. 6 C. 9 D. 57