Decide whether the graph opens up or opens down.f(x) = -(x + 3)2 + 8 

A. opens down
B. opens up


Answer: A

Mathematics

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Write the fraction in simplest form.

A.
B.
C.
D.  

Mathematics

Solve the problem.A rock falls from a tower that is 480 feet high. As it is falling, its height is given by the formula  How many seconds will it take for the rock to hit the ground  Round to the nearest tenth, if necessary.

A. 21.9 sec B. 21.5 sec C. 14,400 sec D. 5.5 sec

Mathematics

Solve the system of equations by substitution.

A. (7, 0) B. (0, -7) C. (1, -8) D. no solution

Mathematics

Solve the problem.The temperature at 5:00 was -3° C. Four hours later, it was -14° C. What was the change in temperature?

A. -17° C B. 11° C C. 17° C D. -11° C

Mathematics