Find the center (h, k) and radius r of the circle with the given equation. x2 + y2 = 16
A. (h, k) = (0, 0); r = 4
B. (h, k) = (4, 4); r = 4
C. (h, k) = (4, 4); r = 16
D. (h, k) = (0, 0); r = 16
Answer: A
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Express the exercise as a system of linear equations, then find the solution. Use a calculator where appropriate.Two numbers total 4, and their difference is 20. Find the two numbers.
A. 12 and - 8 B. 4 and 2 C. 2 and - 18 D. 3 and 1
Find an expression for the nth term of the arithmetic sequence.0.78, 0.86, 0.94, 1.02, 1.1, . . .
A. an = 0.16n + 0.7 B. an = 0.16n + 1.4 C. an = 0.08n + 0.7 D. an = 0.78 + 0.08n
At the given point, find the slope of the curve or the line that is tangent to the curve, as requested.y6 + x3 = y2 + 11x, tangent at (0, 1)
A. y = 
x + 1
B. y = - 
x
C. y = - 
x - 1
D. y = 
x + 1
Name the property that justifies the statement. All variables represent real numbers.
+ 
= 0
A. Identity property of addition B. Inverse property of addition C. Associative property of addition D. Commutative property of addition