Evaluate the expression without using a calculator.91/2
A. 3
B. 1.5
C. 12
D. 6
Answer: A
Mathematics
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Write the system of linear equations that the augmented matrix represents. Use the variables x, y, and z.
A.
| 3x | + 3y | + 8z | = -2 |
| 8x | + 9z | = 4 |
| 8x | + 5y | = 2 |
B.
| 3x | + 3y | + 8z | = -2 |
| 9x | + 8z | = 4 |
| 8x | + 5y | = 2 |
C.
| 3x | + 3y | + 8z | = -2 |
| 9x | + 8z | = -4 |
| 8x | + 5y | = 2 |
Mathematics
Refer to the figure in which O is the center of the circle, ray PA is a tangent, m?BOC = 80°, PE = 10 ft, PD = 12 ft, PB = 19 ft, ER = 4 ft, ER = 4 ft, and BR = 5 ft.
Find DC.
Mathematics
Find the limit algebraically.
(3x2 - 19)2
A. 144 B. -352 C. 100 D. 256
Mathematics
Solve the problem.Suppose a life insurance policy costs $28 for the first unit of coverage and then $7 for each additional unit of coverage. Let C(x) be the cost for insurance of x units of coverage. What will 10 units of coverage cost?
A. $70 B. $42 C. $98 D. $91
Mathematics