Solve the system using substitution.

x + y = 8

y = 3x

A. (4, 12)

B. (2, 6)

C. (1/2, 3/2)

D. (-4, - 12)

Some kids went on a bike ride. The ride was six hours long and the kids traveled 54 mi. For part of the ride they biked at a speed of 7 mph and for part of the ride they biked at a speed of 11 mph.

Write the equations of the second degree in the reduced form. 5-11x² = - 8x 4+3x = - x²+2 x (x + 2) = - 5 (2x-1) ² = 1

Prime factorization of 15

What does 6 x 6+32 x 3=? Show your work

Simplify the fraction 48/200

Explain how a number and it's reciprocal are related adding 28?

A swimming pool is being filled with water. The diameter of the pool is 27 feet, and the height if 4 feet. Which formula represents the correct way to find the volume of the pool? V = pi (13.5) (4) V = pi (13.

G (n) = 2n + 5 f (n) = n^2 + 1 Find (g + f) (n)

The areas a circle is 28.26 square centimeters. What is the circles radius

Which expression is equivalent to 8 - (6r+2) -6r+6 2r+2 6r+10 -6r+10