Solve by the substitution method. x + y = 64x + 4y = 24
A. ?
B. {(x, y)| x + y = 6}
C. {(0, 0)}
D. {(7, -1)}
Answer: B
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Find the measure of the indicated angle. The figure is not drawn to scale.Find the measure of ?y.
A. 39° B. 51° C. 141° D. 41°
Solve the system of equations using the inverse of the coefficient matrix.2x + 8y + 6z = 204x + 2y - 2z = -23x - y + z = 11
A. x = -1, y = 2, z = 1 B. x = 2, y = 1, z = 6 C. No solution D. x = 2, y = -1, z = 4
Solve the problem.As part of her retirement savings plan, Patricia deposited $100 in a bank account during her first year in the workforce. During each subsequent year, she deposited $45 more than the previous year. Find how much she deposited during her twentieth year in the workforce. Find the total amount deposited in the twenty years.
A. $1000; $22,000 B. $955; $10,550 C. $955; $21,100 D. $1000; $11,000
Solve by the method of your choice.m2 = 6m - 9
A. -3 B. 6 C. ±3 D. 3