Which pair of equations represents two perpendicular lines?

1. 2x-5y=45 and y-5/2x=-9

2.-3x+2y=10 and 3y=-2x+12

3.7x+4y=20 and y-3 = - 4/7x

4. x=4y+4 and 4x+4y=4

What is the answer to 0.6 divided by 12.9

The senior class of a high school needs to elect a new class president. Ten people want to run for office, but only four are allowed to so the class needs to determine which four people can run.

Simplify the expression 4x+6x-11x+2+x2-19

Which operation should be performed first according to the order of operations? 44 • 2 - [ (5 + 20 • 3) - 12] + 16 : 2

Find the sum and classify the polynomial based on degree and number of terms. 3n2 (502 - 2n + 1) + (4n2 - 11n4 - 9) O 3rd degree polynomial with 3 terms O 4th degree polynomial with 4 terms O 3rd degree polynomial with 4 terms O 4th degree

What is the correct line description for x+3y=1?

Combine the like terms to create an equivalent expression: - 4y - 4 + (-3)

Dave bought a new game for $28 the tax rate was 7% how much was the tax and total price?

How does a temperature of 4°F compare to - 7°F?

Simplify 4 + 2 (3x - 7) + 5x. -3x + 4 11x - 3 11x - 10 23x - 7