Multiply and simplify.
? 
A. 
B. 
C. - 
D. - 
Answer: D
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Solve the problem.An earthquake was recorded as 106.5 times more powerful than a reference level zero earthquake. What was the magnitude of this earthquake on the Richter scale? R = log
.
A. 16.5 B. 6.5 C. 3.5 D. 15
Graph the parabola whose equation is given. Find the x-intercepts, the y-intercept, and the vertex.y = x2 + 2x - 3
A. x-intercepts: -1 and 3;
y-intercept: 3;
vertex: (1, - 4)
B. x-intercepts: -1 and 3;
y-intercept: -3;
vertex: (1, - 4)
C. x-intercepts: -3 and 1;
y-intercept: -3;
vertex: (- 1, - 4)
D. x-intercepts: 3 and 1;
y-intercept: -3;
vertex: (- 1, - 4)
Use a system of linear equations to solve the problem.Devon purchased tickets to an air show for 7 adults and 2 children. The total cost was 
. The cost of a child's ticket was 
less than the cost of an adult's ticket. Find the price of an adult's ticket and a child's ticket.
A. adult's ticket: $15; child's ticket: $12 B. adult's ticket: $14; child's ticket: $11 C. adult's ticket: $13; child's ticket: $10 D. adult's ticket: $12; child's ticket: $9
Multiply.31 ? 0
A. -31 B. 31 C. 1 D. 0