Determine the number by which both sides of the equation must be multiplied or divided, as specified, to obtain just x on the left side.
x = 7; multiplied
A. 7
B. - 
C. 
D. 4
Answer: C
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A cannon fires a cannonball as shown in the figure. The path of the cannonball is a parabola with vertex at the highest point of the path. If the cannonball lands 800 ft from the cannon and the highest point it reaches is 1600 ft above the ground, find an equation for the path of the cannonball. Place the origin at the location of the cannon.
 figure 1.png)
Simplify the expression.8x + (10x + 1)
A. 18x + 1 B. 80x C. 18x2 + 1 D. 36x
Determine the real solutions to the system of nonlinear equations.x2 + y2 = 8 -5x + y2 = -6
A. (2, 2) B. (2, 2), (2, -2), (-7, 2), (-7, -2) C. (2, 2), (2, -2) D. (2, 2), (2, -2), (-2, 2), (-2, -2)
Solve.The difference of four times a number and seven times the same number is 9. Find the number.
A. -4 B. 4 C. 3 D. -3