Graph the parabola and give its vertex, axis, x-intercepts, and y-intercepts.f(x) = -7x2 - 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
Answer: D
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Provide an appropriate response.Use the graphs of the linear functions to solve the problem. Write the linear system whose solution set is 
. Express each equation in the system in slope-intercept form. 
A.
| y = x - 2 |
x + 1B.
| y = x + 2 |
x - 1C. y = -
x + 2 y =
x + 1D. y = -
x + 2y = x - 2
Solve the equation and check your solution.
= 6 - 
A. x = 
B. x = 
C. x = 7
D. x = 8
Either the dimensions of two matrices or the matrices themselves are given. Find the dimensions of the product AB and the product BA. If either is not defined, say so.A is 4 × 4; B is 4 × 4.
A. AB is 8 × 4; BA is 8 × 4. B. AB is 8 × 8; BA is 8 × 8. C. AB is 4 × 8; BA is 4 × 8. D. AB is 4 × 4; BA is 4 × 4.
Solve.Jeremy can stand on one leg for 7.6 min. Express this time in seconds.
A. 414 sec B. 426 sec C. 456 sec D. 384 sec