Complete the square. Then write the perfect-square trinomial in factored form.x2 + 8x
A. x2 + 8x + 16; (x + 4)2
B. x2 + 8x + 64; (x + 8)2
C. x2 + 8x; (x + 4)2
D. x2 + 8x + 16; (x - 4)2
Answer: A
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Solve the inequality and express the solution set in interval notation. Graph the solution set on the real number line.-6(3x + 4) < -24x - 18
A. (-?, 1)
B. [1, ?)
C. (-?, 1]
D. (1, ?)
Combine like terms.8.8t + 3.1 - 2.7t
A. -6.1t + 3.1 B. 6.1t + 3.1 C. -6.1t - 3.1 D. 11.5t + 3.1
Determine which value(s), if any, must be excluded from the domain of the variable in the expression.
A. x= -6 B. x = 6 C. x = 0 D. none
Solve.In total a medical research facility spent $9,000,000 to develope a drug. 20% of this cost was for staff and 5% was for equipment. How much was spent to cover both the staff and the equipment?
A. $6,750,000 B. $36,000,000 C. $90,000 D. $2,250,000