Solve the system by substitution.
A. inconsistent, ?
B. (1, -5)
C. (0, -4)
D. (4, 0)
Answer: C
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Solve the problem.A water tank is formed by revolving the curve y = 2x4 about the y-axis. Find the volume of water in the tank as a function of the water depth, y.
A. V(y) = 
y3/2
B. V(y) = 
y3/2
C. V(y) = 
y9
D. V(y) = 
y1/2
Determine whether the given equation is an identity.
= 
+ 4
A. Yes B. No
Use the distributive property to rewrite the algebraic expression without parentheses. Then simplify the result, if possible.2(x + y)
A. 2xy B. 2x + 2y C. 2x - 2y D. 2x + y
You are on a shopping trip. The store will round the amount you pay for each item to the nearest cent. Find the amount you will pay.Paper towels are 5 rolls for $19.58, so one roll is $3.9160. You pay:
A. $4.02 B. $3.916 C. $3.91 D. $3.92