What is the value of x that makes the number sentence true? x + (-5) = -5

The perimeter of a triangle is 69 cm. the first is 5 cm shorter than the second side. the third side is twice as long the first side. find the length of each side

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.

Factor k2 - 17k + 16. a.(k - 2)(k - 8) b.(k - 1)(k + 16) c.(k - 1)(k - 16)