Solve the system of equations graphically.x - y = 4x + y = 10
A. (14, 6)
B. (6, 14)
C. (3, 7)
D. (7, 3)
Answer: D
Mathematics
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Find the exact value by using a half-angle identity.sin 22.5°
A. - 
B. 
C. 
D. - 
Mathematics
The distribution of the math SAT test scores at a local college is approximately Normal (630, 120) .
(a) What is the percentage of the scores is below 550? (b) What is the percentage of the scores is above 650?
Mathematics
Graph the function using its vertex, axis of symmetry, and intercepts.f(x) = -x2 + 6x
A. vertex (3, 9)
intercepts (0, 0), (6, 0)
B. vertex (-3, -9)
intercept (0, -18)
C. vertex (3, -9)
intercept (0, -18)
D. vertex (-3, 9)
intercepts (0, 0), (- 6, 0)
Mathematics
Graph the inequality.2x + 3y ? 6
A. 
B. 
C. 
D. 
Mathematics