Simplify using order of operations.9(-4 + 6) - (6 - 9)
A. -27
B. 27
C. -21
D. 21
Answer: D
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Solve the problem.A ramp leads up to a warehouse loft. The path up the ramp is 21 ft long. The base of the ramp is 16 ft long. How high is the loft? Round your answer to hundredths. 
A. 6.80 ft B. 92.50 ft C. 18.50 ft D. 13.60 ft
Find the intervals on which the function is continuous.y = 
A. continuous on the interval 
B. continuous on the interval 
C. continuous on the interval 
D. 
Provide an appropriate response.Perform the indicated operations without a calculator: 54 ÷ 103 =
A. 0.054 B. 0.54 C. 54,000 D. 0.0054
Graph the parabola and give its vertex, axis, x-intercepts, and y-intercepts.f(x) = -11x2 - 2x - 9
A. vertex 
; axis is x = - 
;
no x-intercepts; y-intercept is -9
B. vertex 
; axis is x = 
;
no x-intercepts; y-intercept is -9
C. vertex 
; axis is x = 
;
no x-intercepts; y-intercept is 9
D. vertex 
; axis is x = - 
;
no x-intercepts; y-intercept is 9