Write an equivalent expression. Use an associative law.a + (b + 3)
A. (a + b) + 3
B. (b + 3) + a
C. a(b + 3)
D. a + (3 + b)
Answer: A
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Write the function in the form y = f(u) and u = g(x). Then find dy/dx as a function of x.y = (-2x + 7)5
A. y = 5u + 7; u = x5; 
= -10x4
B. y = u5; u = -2x + 7; 
= 5(-2x + 7)4
C. y = u5; u = -2x + 7; 
= -2(-2x + 7)5
D. y = u5; u = -2x + 7; 
= -10(-2x + 7)4
Solve the problem.A certain company has found that its expenditure rate per day (in hundreds of dollars) on a certain type of job is given by 
where x is the number of days since the start of the job. Find the expenditure if the job takes 6 days.
A. $8400 B. $2600 C. $84 D. $26
Simplify the expression.
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Write the answer without using negative exponents. Assume that all variables are restricted to those numbers for which the expression is defined.
What will be an ideal response?
Find the center (h, k) and radius r of the circle with the given equation. x2 + 6x + 9 + (y - 6)2 = 49
A. (h, k) = (3, -6); r = 49 B. (h, k) = (-3, 6); r = 7 C. (h, k) = (6, -3); r = 7 D. (h, k) = (-6, 3); r = 49