Write the phrase as a variable expression. Use x to represent "a number."5 times a number
A. 5 + x
B. 5 - x
C. 5x
D. 
Answer: C
Mathematics
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Solve the exponential equation.3x2 + 7 x = 
A. 3 , -4 B. 3 , 4 C. -3 , 4 D. -3 , -4
Mathematics
Identify the property illustrated by the statement.5 ? 1 = 5
A. Distributive property B. Multiplicative identity C. Additive identity D. Multiplication property
Mathematics
Use Gaussian elimination to find the complete solution to the system of equations, or state that none exists. x + y + z + w =7 3x - 2z + 5w=11-4x + 3y + w=4-x - y - z - w=6
A. {(
, 1, 
, -2)}
B. {(-11, 
, 
, -4)}
C. {(
, - 
, 5, - 
)}
D. ?
Mathematics
Add or subtract as indicated. If terms are not like radicals and cannot be combined, so state. Assume all variables represent nonnegative real numbers.6
+ 
A. 7
B. 8
C. 6
D. 26
Mathematics