Find the missing number, if possible. There may be more than one number that works, so find as many as possible. If no number works, write "No number possible."
+ 6 = 7
A. 1
B. -13, 13
C. -1, 1
D. 13
Answer: C
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Solve.David recently switched to a long distance phone company which charges a monthly fee of $7.45 plus $0.06 per minute. A linear function that expresses the monthly bill B as a function of minutes used m is 
What is the monthly bill if 250 minutes were used for long distance phone calls?
A. $157.45 B. $19.71 C. $22.45 D. $15.00
Solve the problem.A furniture store buys 45 footstools from a distributor at a cost of $230 each plus an overhead charge of $45 per order. The retail markup is 25% on the total price paid. Find the profit on the sale of one footstool.
A. $57.50 B. $57.75 C. $57.25 D. $5775.00
Add or subtract. Assume all variables represent positive real numbers.
+ 4
+ 2
A. 15
B. 15
C. 6
D. 6
Solve the problem.Cal is packing his suitcase to go on a trip. He wants to pack 4 pairs of pants chosen from the 6 pairs of pants in his closet and 3 shirts chosen from the 10 shirts in his closet. In how many ways can this be done?
A. 1800 B. 43,200 C. 10,800 D. 259,200