Write the augmented matrix for the system.
A. 
B. 
C. 
D. 
Answer: C
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Solve.A young married couple had a combined annual income of $80,000. If the wife made $4000 more than the husband, write these relationships as a system of equations. Let x be the husband's income and let y be the wife's income.
A. x + y = 4000 y = x + 80,000 B. x + y = 80,000 y = 4000 C. x - y = 80,000 y = x + 4000 D. x + y = 80,000 y = x + 4000
Perform the indicated operation.
- 
A. 
B. Not defined
C. 
D. 
Answer the question.List the first four multiples of 15x and of 10x
A. 15x, 225x, 3375x, 50,625x; 10x, 100x, 1000x, 10,000x
B. 15x, 30x, 45x, 60x; 10x, 20x, 30x, 40x
C. 75x, 90x, 105x, 120x; 50x, 60x, 70x, 80x
D. 15x, 
x, 5x, 
x; 10x, 5x, 
x, 
x
Write the following proportion.7 acres is to 5.2 acres as 10.5 acres is to 7.8 acres.
A. 
= 
B. 
= 
C. 
= 
D. 
= 