Factor. Check by multiplying.ar - as + at
A. ar(1 - s + t)
B. r(a - s + t)
C. a(r + s + t)
D. a(r - s + t)
Answer: D
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Solve the system by the addition method. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.
A. {(1, 7)} B. no solution; ? C. {(-8, 0)} D. {(0, 8)}
Solve the problem.Is the line that passes through (9, -2) and (10, -8) parallel to the line that passes through (-3, 5) and 
A. Yes B. No
Solve the problem.The correlation between respiratory rate and body mass in the first three years of life can be expressed by the function log R(w) = 1.81 - 0.34 log (w),where w is the body weight (in kg) and R(w) is the respiratory rate (in breaths per minute). Find R'(w) using implicit differentiation.
A. R'(w) = -21.95w-1.34 B. R'(w) = 64.57w-1.34 C. R'(w) = -21.95w-0.66 D. R'(w) = -21.95w-0.34
Multiply.5y(y7 - 6y - 6)
A. 5y8 - 30y2 - 30y B. 5y8 + 5y2 - 30 C. 10y7 - 30y2 - 30y D. 5y7 + 5y2 - 30y