If (x - 3) and (x + 7) are the factors of the trinomial x2 + ax – 21, what is the value of a?
A.)-3
Б.)-4
C.)7
Д.)4

The length of the largest fish is 967.74 times greater than the length of the smallest fish. select a variable expression that shows the length of the largest fish, if 8 is the length of the smallest fish. a. s + 967.74 b. \[ \frac{967.74}{s} \] c. 967.74 - s d. 967. 74s

How many solutions does the nonlinear system of equations graphed bellow have?

Suppose y varies directly with x. write a direct variation equation that relates x and y. then find the value of y when x=12 y=7 when x=3