Remove the parentheses from the expression.
A. 4x + 6y - 2z - 5w - 12
B. 4x + 6y + 2z + 5w - 6
C. 4x + 6y - 2z + 5w - 6
D. 4x + 6y + 2z - 5w - 12
E. 4x - 6y - 2z - 5w - 6
Answer: C
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Which of the following would not be a valid method of justifying the surface area of a sphere formula? ?
A. ?Taking apart the cover of a baseball. B. ?Placing square units over a sphere. C. ?Painting a sphere and determining the amount of paint used (in gallons/liters) and then converting this figure into square units. D. ?Tessellating a sphere with shapes with known areas. E. ?None of the above.
Solve by addition or substitution.x + y = -10x - y = -4
A. (7, -2) B. (-7, -3) C. (-8, -2) D. ?
Divide and, if possible, simplify.
A. 
B. 
C. 2
D. 
Graph the function using its vertex, axis of symmetry, and intercepts.f(x) = -x2 + 4x + 5 
A. vertex (-2, -9)
intercepts (-5, 0), (1, 0), (0, -5)
B. vertex (2, -9)
intercepts (5, 0), (- 1, 0), (0, -5)
C. vertex (-2, 9)
intercepts (-5, 0), (1, 0), (0, 5)
D. vertex (2, 9)
intercepts (5, 0), (- 1, 0), (0, 5)