Evaluate.
A. -3
B. 3
C. -2
D. -4
Answer: A
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Solve the problem.A window is in the form of a rectangle surmounted by a semicircle. The rectangle is of clear glass, whereas the semicircle is of tinted glass that transmits only one-fifth as much light per unit area as clear glass does. The total perimeter is fixed. Find the proportions of the window that will admit the most light. Neglect the thickness of the frame.
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Illustrate and find the product by the indicated method.Use repeated addition on your calculator to find 7679 × 5.
A. 7679 × 5 = 5 × 7679 = 7679 × 7679 × 7679 × 7679 × 7679 = 38,395 B. 7679 × 5 = 5 × 7679 = 7679 + 7679 + 7679 + 7679 + 7679 = 38,395
Provide an appropriate response. Factor completely: x2 - 2x - 15
A. (x - 2)(x + 5) B. (x + 3)(x + 5) C. (x + 3)(x - 5) D. (x - 3)(x - 5)
Solve the system of equations. If the system has infinitely many solutions, let the last variable be the arbitrary variable.x + 3y + 2z = 11 4y + 9z = -12
A. 
B. 
C. 
D. 