Translate the phrase to an algebraic expression. Use "x" to represent "a number". Multiply 7
by a number
A. 7
B. 7
+ x
C. 7x ? 
D. 7
? x
Answer: D
Mathematics
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Solve the problem.One number is 7 less than a second number. Twice the second number is 4 less than 5 times the first. Determine the numbers by solving the following system of equations, using x and y to represent the unknown numbers. 
A. -13 and -6 B. 5 and 12 C. 6 and 13 D. 7 and 14
Mathematics
Express the statement as an equation involving the indicated variables.The volume V of a sphere is 
times ? times the cube of the radius r.
A. V = 
?r
B. V = 
?r2
C. V = 
?r3
D. V = 
? 
Mathematics
Find the midpoint of the segment with the given endpoints.(-9, -4) and (7, 7)
A. (-2, 3)
B. (-16, -11)
C. 
D. 
Mathematics
Find the product.(3a)(4a2)
A. 12a3 B. 7a3 C. 12a2 D. 3a + 4a2
Mathematics