Solve these systems of equations.

1.

{2x-y=11

{5x-y=10

x=? y=?

2.

{x+2y=25

{-x+7y=56

x=? y=?

3.

{3x-2y=7

{x+2y=13

x=? y=?

The bar graph shows the recommended number of hours of sleep for each age group. How many hours of sleep are recommended for elementary-age children? exactly 9 hours exactly 10 hours about 10 hours about 12 hours

The difference between a number and 8

Which is the standard form of the equation of the parabola that has a vertex of (3,1) and a directrix of x = - 2?

Solve for y: 5 (x+y) = 20+3x

Given that f (x) = 5x^3+ax^2-4x-2 and that (x-1) is a factor of f (x), find a.

Evaluate 48 24 : 8 - 22

Georgina works on the 30 floor she took an elevator to the 7 floor how many floors did she travel

the dog trainer is making goodie bags for dogs 90 dog treats and 54 dog toys what is the greatest number

Solve 1/4 (x-3) = 1/3 (x-2)

Use the line tool to graph the equation 2x+3y=9.