Solve by the substitution method.x - 3y = -67x - 2y = -42
A. {(-6, 0)}
B. {(6, -1)}
C. {(x, y)|x - 3y = -6}
D. ?
Answer: A
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Express the number in scientific notation.2500
A. 2.5 × 10-2 B. 2.5 × 10-3 C. 2.5 × 103 D. 2.5 × 102
Convert to a logarithmic equation.3-2 = 
A. -2 = log 1/9 3
B. -2 = log 3 
C. 3 = log 2 
D. 
= log 3 -2
For the polynomial, list each real zero and its multiplicity. Determine whether the graph crosses or touches the x-axis at each x -intercept.f(x) = 
x2(x2 - 3)
A. 0, multiplicity 2, touches x-axis
B. 0, multiplicity 2, crosses x-axis
C. 0, multiplicity 2, touches x-axis;
, multiplicity 1, crosses x-axis;
-
, multiplicity 1, crosses x-axis
D. 0, multiplicity 2, crosses x-axis;
, multiplicity 1, touches x-axis;
-
, multiplicity 1, touches x-axis
What percent of 5.18 is 1.5? Round to the nearest tenth of a percent when necessary.
A. 31.0% B. 29.0% C. 39.0% D. 19.0% E. 43.5%