Solve.- 
(x + 4) - 
(x - 9) = x + 6
A. x = - 
B. x = - 
C. x = - 
D. x = - 
Answer: B
Mathematics
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Factor by grouping.18r2 + 45ry - 2xr - 5xy
A. (2r + 5y)(x - 9r) B. (2r + 5y)(9x - r) C. (5r + 2y)(9r - x) D. (2r + 5y)(9r - x)
Mathematics
Evaluate the expression.(-7)2
A. -14 B. -49 C. 14 D. 49
Mathematics
Provide an appropriate response.Factor: y2 + 22y + 40
A. (y + 2)(y + 20) B. 2(y2 + 11y + 20) C. (y - 2)(y - 20) D. (y + 4)(y + 10)
Mathematics
Solve the problem.The path of a projectile fired at an inclination ? (in degrees) to the horizontal with an initial speed v0 is a parabola. The maximum height H of the projectile is given by H = 
(1 - cos (2?))where g is the acceleration due to gravity.Show that the maximum height H can be written H = 
What will be an ideal response?
Mathematics