Find the acute angle, in degrees, between the lines.x - 
y = -19 and 
x - y = 2
A. 75°
B. 45°
C. 60°
D. 30°
Answer: D
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Solve the problem.Use the fact that sin-1 x = x +
for |x| < 1 to find the series for cos-1 x.
A. 
- 
B. 
- x + 
C. 
- x - 
D. 
- x + 
Find the perimeter of the kite:
Solve the equation. Express radicals in simplest form.2n2 - 56 = 0
A. {± 2
}
B. {7
}
C. {4
}
D. {± 4
}
Solve the problem.Linda invests $25,000 for one year. Part is invested at 5%, another part at 6%, and the rest at 8%. The total income from all 3 investments is $1600. The income from the 5% and 6% investments is the same as the income from the 8% investment. Find the amount invested at each rate.
A. $10,000 at 5%, $5000 at 6%, $10,000 at 8% B. $10,000 at 5%, $10,000 at 6%, $5000 at 8% C. $5000 at 5%, $10,000 at 6%, $10,000 at 8% D. $8000 at 5%, $10,000 at 6%, $7000 at 8%