Solve the problem.Mary and her brother John collect foreign coins. Mary has twice the number of coins that John has. Together they have 135 foreign coins. Find how many coins Mary has.
A. 18 coins
B. 45 coins
C. 90 coins
D. 81 coins
Answer: C
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Solve the problem.Suppose that c(x) = 4x3 - 39x2 + 8324x is the cost of manufacturing x items. Find a production level that will minimize the average cost of making x items.
A. 89 items B. -70 items C. 8324 items D. There is not a production level that will minimize average cost.
Complete the following:(a) Write the equation in slope-intercept form.(b) Give the slope and y-intercept of the line.3x + 4y = 31
A. (a) y = 
x + 
(b) 
; 
B. (a) y = 
x + 
(b) 
; 
C. (a) y = - 
x + 
(b) - 
; 
D. (a) y = - 
x + 
(b) - 
; 
Determine whether the players have equal probabilities of winning.Draw a card from a regular deck. If a face card is drawn, player 1 wins; if a numbered card is drawn, player 2 wins.
A. Yes B. No
Determine the most appropriate metric unit to go in the blank. Choose from km, m, cm, mm, L, mL, kg, g, and mg.The bird's wingspan is 30 
.
A. mm B. m C. mL D. cm E. mg