Solve the system of equations by substitution.2x + 9y = -8 x + 
y = 
A. (5, -2)
B. (5, 2)
C. (-5, 2)
D. ( -5, -2)
Answer: A
Mathematics
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Write the number in standard notation.9.432 × 10-6
A. 0.0000009432 B. 0.00009432 C. -9,432,000 D. 0.000009432
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Establish the identity.(cos ? + sin ?)2 + (cos ? - sin ?)2 = 2(cos2? + sin2?)
What will be an ideal response?
Mathematics
Factor completely.5x3 + 5x2y - 30xy2
A. 5x(x - 2y)(x + 3y) B. prime C. 5x(x + 2y)(x - 3y) D. (x - 2y)(5x2 + 15xy)
Mathematics
Find the area between the curves.y = 
x2, y = -x2 + 6
A. 32 B. 16 C. 8 D. 4
Mathematics