Simplify.-|23|
A. 1
B. 23
C. -1
D. -23
Answer: D
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Solve the initial value problem.2 
- 4xy = 8x; y(0) = 25
A. y = 2 + 25ex2 B. y = -2 + 27e-x2 C. y = -2 + 27ex2 D. y = -1 + 26ex2
Solve the problem. Round to the nearest tenth if necessary.Avegail needs to determine the distance at certain points across a lake. Her crew and she are able to measure the distances shown on the diagram below. Find how wide the lake is to the nearest tenth of a meter.
A. 50 m B. 111.8 m C. 7.1 m D. 86.6 m
Convert the polar equation to a rectangular equation.r = 5 cos ? + 2 sin ?
A. x2 - y2 = 5x + 2y B. x2 + y2 = 2x + 5y C. 5x + 2y = 0 D. x2 + y2 = 5x + 2y
Determine whether the matrix is in row-echelon form. If it is, then determine also whether it is in reduced row-echelon form.
A. Yes; yes B. Yes; no C. No