Solve the system by the substitution method.x2 + y2 = 23y2 = 2x + 20
A. (2, 
), (-3, 
), (2, -
), (-3, -
)
B. (1, 
), (-3, 
), (1, -
), (-3, -
)
C. (1, 
), (-2, 
), (1, -
), (-2, -
)
D. (1, 
), (-3, 
), (1, -
), (-3, -
)
Answer: D
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Use the Intermediate Value Theorem to determine whether the polynomial function has a zero in the given interval.f(x) = 7x4 - 5x2 - 7; [1, 2]
A. f(1) = -5 and f(2) = 85; yes B. f(1) = -5 and f(2) = -85; no C. f(1) = 5 and f(2) = -85; yes D. f(1) = 5 and f(2) = 86; no
Find the product.-2x(10x - 3)
A. -20x2 - 3x B. -20x2 + 6x C. -14x2 D. 10x2 + 6x
Write the partial fraction decomposition of the rational expression. 
A. 
+ 
- 
B. 
- 
- 
C. 
+ 
+ 
D. 
- 
+ 
Write the sentence as a proportion. Then determine whether the proportion is a true proportion.four is to three as thirteen is to ten
A. 
= 
; true
B. 
= 
; false
C. 
= 
; true
D. 
= 
; false