Multiply.- 1
A. - 
B. 
C. 
D. - 
Answer: C
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Solve using the problem-solving strategy for systems of linear equations.The three angles in a triangle always add up to 180°. If one angle in a triangle is 72° and the second is 5 times the third, what are the three angles?
A. 72°, 89°, 19° B. 72°, 91°, 17° C. 72°, 88°, 20° D. 72°, 90°, 18°
Solve the problem.The voltage E in an electrical circuit is given by E = 1.5 cos 90?t, where t is time measured in seconds. Find the frequency of the function (that is, find the number of cycles or periods completed in one second).
A. 45
B. 
C. 90
D. 
Simplify using order of operations.5(-8) + (-4)(-4)
A. 176 B. -24 C. -176 D. 24
Solve the problem.As part of her retirement savings plan, Patricia deposited $300 in a bank account during her first year in the workforce. During each subsequent year, she deposited $50 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. $1300; $32,000 B. $1250; $31,000 C. $1250; $15,500 D. $1300; $16,000