Without graphing, find the vertex.f(x) = -(x + 3)2 + 7
A. (7, -3)
B. (-7, 3)
C. (7, -9)
D. (-3, 7)
Answer: D
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Find the center of mass of the thin rod with the given density function.Find the center of mass of a thin rod that lies along the first-quadrant portion of the circle 
if the density of the rod is 
A. 
= 3, 
= 3
B. 
= 2, 
= 2
C. 
= 
, 
= 
D. 
= 
, 
= 
Solve the problem. Round approximations to the nearest cent.The five sales people at Southwest Appliances earned commissions last year of $17,000, $29,000, $48,000, $20,000, and $23,000. Find the mean commission.
A. $28,770 B. $26,030 C. $30,140 D. $27,400
Write out the sum.
A. 19 + 20 + 21 + ... + (n + 19) B. 1 + 2 + 3 + ... + n C. 20 + 21 + 22 + ... + (n + 19) D. n + 19
Solve the problem.Julia is preparing a meal by combining three ingredients. One unit of each ingredient provides the following quantities (in grams) of carbohydrates, fat, and protein. Protein(g)Carbohydrates(g)Fat (g)Ingredient A331Ingredient B242Ingredient C451Ideally the meal should contain 
of protein, 
of carbohydrates, and 
of fat. How many units of each ingredient should Julia use?
A. 2 grams of ingredient A, 3 grams of ingredient B, 4 grams of ingredient C B. 3 grams of ingredient A, 4 grams of ingredient B, 2 grams of ingredient C C. 4 grams of ingredient A, 2 grams of ingredient B, 3 grams of ingredient C D. 2 grams of ingredient A, 4 grams of ingredient B, 3 grams of ingredient C