Provide an appropriate response.For a certain system of three linear equations, the solution set is 
and 
Find the values of Dx, Dy, and Dz.
A. Dx = -5; Dy = -12; Dz = -15
B. Dx = 5; Dy = 12; Dz = 15
C. Dx = -12; Dy = -5; Dz = -15
D. Dx = - 
; Dy = - 
; Dz = - 
Answer: A
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Solve the problem.Ron and Kathy are ticket-sellers at their class play. Ron is selling student tickets for $1.00 each, and Kathy selling adult tickets for $3.50 each. If their total income for 23 tickets was $53.00, how many tickets did Ron sell?
A. 17 tickets B. 11 tickets C. 13 tickets D. 12 tickets
Multiply the real numbers. Write any improper fraction as a whole or mixed number where appropriate.-3
? 7
A. -147
B. -21
C. -10
D. -26
Solve the problem. Give the answer to the nearest thousandth if necessary.A boat travels 2 miles south and then 6 miles east. How far is the boat from its starting point? 
East --6 mi-->
A. 20 mi B. 6.325 mi C. 3.163 mi D. 4 mi
Solve the problem. Assume that all pizzas are circular in shape and that the measurement given in the table is the diameter of the pizza in inches. Use 3.14 as the approximate value of ?. Use the table below to find the cost per square inch for each size of cheese pizza. Round your answers to the nearest thousandth. Which size is the best buy?
Cheese$4.20$8.40$10.40Veggie$5.30$9.20$12.60Pesto$5.80$10.30$13.90
A.
| Small | ? $0.191 |
Large ? $0.207
Best buy: small
B.
| Small | ? $0.027 |
Large ? $0.013
Best buy: large
C.
| Small | ? $9.158 |
Large ? $19.323
Best buy: small
D.
| Small | ? $0.109 |
Large ? $0.052
Best buy: large