Solve the system by the method of substitution.
A. 
B. 
C. 
D. 
E. no solution exists
Answer: D
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Express the number in scientific notation.In a certain city, the subway system carried a total of 1,740,000,000 passengers.
A. 17.4 × 109 B. 1.74 × 109 C. 1.74 × 108 D. 1.74 × 1010
Identify the rate, base, and portion. 24% of 38 is what number?
A. rate (%) = 38% base (of) = 24 portion (is) = unknown number B. rate (%) = unknown number base (of) = 38 portion (is) = 24% C. rate (%) = 24% base (of) = unknown number portion (is) = 38 D. rate (%) = 24% base (of) = 38 portion (is) = unknown number
Solve the equation.
+ 3 = 0
A. {-9}
B. {9}
C. {
}
D. ?
Sketch the graph of the quadratic function. Identify the vertex and axis of symmetry.f(x) = (x - 5)2 + 2
A. vertex (-5, 2)
axis of symmetry: x = -5
B. vertex (2, 5)
axis of symmetry: x = 2
C. vertex (5, 2)
axis of symmetry: x = 5
D. vertex (-2, -5 )
axis of symmetry: x = -2