Solve the system.5x + 2y + z = -112x - 3y - z = 177x + y + 2z = -4
A. (-3, 0, 4)
B. (0, -6, 1)
C. (0, 6, -1)
D. (3, 0, -4)
Answer: B
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Solve the problem using the rule of 78.Dallas Wright took out a 48-month fixed installment loan of $6000 to purchase a new all-terrain vehicle (ATV). He began making monthly payments of $210.00. Instead of making his 30th payment, Dallas decides to repay his loan in full. How much interest will Dallas save?
A. $553.40 B. $1465.71 C. $593.27 D. $25.96
Solve the problem.If f(?) = cos ? and f(a) = 
, find the exact value of f(a) + f(a + 2?) + f(a + 4?).
A. 
+ 6?
B. 
C. 
D. 
Change the word statement to an equation. Use x as the variable.Twice a number less 9 equals 3.
A. 2(x - 9) = 3 B. 9 - 2x = 3 C. 2x - 9 = 3
Calculate the unit vector u = (cos ?)i + (sin ?)j for the given direction angle.? = 
A. 
i - 
j
B. - 
i - 
j
C. - 
i + 
j
D. 
i + 
j