Find the perimeter by using the appropriate formula, if 
and 
.
?
?
__________ ft
Fill in the blank(s) with the appropriate word(s).
22
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Use the distributive property to multiply. Then, if possible, simplify the resulting expression.3(7 + m)
A. 21m B. 21 + m C. 21 + 7m D. 21 + 3m
Solve the problem.A rug is to fit in a room so that a border of consistent width is left on all four sides. If the room is 
by 
and the area of the rug is 112 square feet, how wide will the border be?
A. 4 ft B. 5 ft C. 3 ft D. 5.5 ft
Write the system of linear equations represented by the augmented matrix. Use x, y, z, and, if necessary, w for the variables. Then use back-substitution to find the solution.
A. {(
, -8, 4)}
B. {(
, -6, 4)}
C. {(- 3, - 
, 3)}
D. {(- 
, -6, 4)}
Solve the problem.Joe goes to a mexican restaurant and order nachos. He can have just cheese or add any of the following: chicken, onion, sour cream or olives. How many different variations of nachos are possible?
A. 64 B. 8 C. 16 D. 32