Simplify the expression. First use the distributive property to remove any parentheses.-(7y - 2z + 7)
A. -7y - 2z + 7
B. -7y + 2z + 7
C. -7y - 2z - 7
D. -7y + 2z - 7
Answer: D
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Write the number in scientific notation.The population of a small country is 4,394,000.
A. 4.394 × 106 B. 4.394 × 105 C. 4.394 × 10-5 D. 4.394 × 104
The given pattern continues. Write down the nth term of the sequence suggested by the pattern.-3, 9, -27, 81, . . .
A. an = (-1)n+1 3n+1 B. an = (-1)n 3n C. an = 3n+1 D. an = 3n
Multiply, and then simplify if possible. Assume all variables represent positive real numbers.
(
+ 
)
A. 35 + 25
B. 5
+ 5
C. 25
+ 5
D. 5
+ 25
Solve the problem.A spotlight has a parabolic cross section that is 6 ft wide at the opening and 2.5 ft deep at the vertex. How far from the vertex is the focus? Round answer to two decimal places.
A. 0.26 ft B. 0.90 ft C. 0.21 ft D. 0.52 ft