Answer the question.The equation of a circle can be written in the form x2 + y2 = r2. Is this a function? Why or Why not?
What will be an ideal response?
It is not a function because for y ? 0, there are 2 y-values for every x-value. It fails the vertical line test.
Mathematics
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7
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.Let angle POQ be designated ?. Angles PQR and VRQ are right angles. If ? = 31°, find the length of OU accurate to four decimal places. 
A. 1.1666 B. 0.8572 C. 1.9416 D. 0.5150
Mathematics
Write a formula for a linear function f whose graph satisfies the conditions.Slope: 
; y-intercept: 3
A. f(x) = - 
x + 3
B. f(x) = 
x + 3
C. f(x) = - 
x - 3
D. f(x) = 
x - 3
Mathematics
Find the square root, rounded to hundredths if necessary.
A. 7 B. 6 C. 12 D. 8
Mathematics