Simplify the expression.42 + 43
A. 20
B. 1024
C. 80
D. 4096
Answer: C
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Solve the system by graphing. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.
A. {(-1, -4)} B. {(-3, -4)} C. {(-3, 4)} D. {(3, 4)}
Solve the problem.A $90,000 trust is to be invested in bonds paying 8%, CDs paying 5%, and mortgages paying 9%. The bond and CD investment together must equal the mortgage investment. To earn a $7020 annual income from the investments, how much should the bank invest in bonds?
A. $24,000 B. $22,000 C. $45,000 D. $21,000
Multiply and simplify.9 ? 
A. 1
B. 
C. 
D. 81
Rewrite the expression as the sum and/or difference of logarithms, without using exponents. Simplify if possible.logn
A. 
logn6 + 
lognx - 
lognz
B. 
logn6 + 5 lognx - 9 lognz
C. 
logn6 + 
lognx + 
lognz
D. 
logn6 - 
lognx - 
lognz