Simplify the following by combining like terms.9x9 + 4x6 + 5x9
A. 18x6
B. 14x9 + 4x6
C. 18x24
D. cannot be simplified
Answer: B
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When two resistors of resistances 
and 
are connected in parallel (see figure), the total resistance 
style="vertical-align:middle;" /> satisfies the equation
?
.
Find 
for a parallel circuit in which 
ohms and R must be at least 1 ohm.
?
A. 
B. 
C. 
D. 
E. 
Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.cos ? = 
, 0 < ? < 
Find sin(2?).
A. 
B. 
C. 
D. 
Use the formula for the general term (the nth term) of an arithmetic sequence to find the indicated term of the sequence with the given first term, a1, and common difference, d.Find a60 when a1 = 9, d = -4.
A. -227 B. 245 C. -231 D. 249
Evaluate the expression, if possible.-321/5
A. 32 B. 16 C. -8 D. -2