Solve the system by the substitution method.

4x+y=0

8x-2y=6

A cyclist rides her bike at a rate of 15 miles per hour. What is this rate in kilometers per hour? How many kilometers will the cyclist travel in 3 hours? In your computations, assume that I mile is equal to 1.6 kilometers. Do not round your answers.

The coins in the stores cash register total $12.50. The cash register contains only nickels, dimes, and quarters. There are twice as many dimes and nickels. There are also twice as many quarters as dimes. How many dimes are in the cash register?

4p^2 without exponent

What is the value of the expression? (11,982) 0 A 0 B 1 C 11,982 D 119,820

On Monday, 351 students went on a trip to the zoo. All 7 buses were filled and 8 students had to travel in cars. How many students were in each bus?

A deadly bacteria doubles in size every 3 hour. If there were initially 14 spores present, how long will it take for the number of bacteria to increase to 1792 spores?

Compare the quantity in Column A with the quantity in Column B. line PA is tangent to the circle at A

Find the value or values of y in the quadratic equation y2 + 4y + 4 = 7. A. y = - 2 + √ 7, y = - 2 - √ 7 B. y = 2, y = 7 C. y = - 2√ 7, y = 2√ 7 D. y = 2 + 2√ 7, y = 2 - 2√ 7

What is the solution of the equation 4x + 17 = 45? -7 -6 6 7

What is the area of the circle? d = 8 m 6471 m2 50.24 m2 100.48 m2