Solve the system by substitution.x + 7y = -23x + y = 34
A. {(7, 12)}
B. {(12, -2)}
C. {(3, 7)}
D. {(-2, 3)}
Answer: B
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Solve the problem.A glass has circular cross sections that taper (linearly) from a radius of 6 cm at the top of the glass to a radius of 5 cm at the bottom. The glass is 14 cm high and full of lemonade. How much work is required to drink all the lemonade through a straw if your mouth is 7 cm above the top of the glass? Assume the density of lemonade equals the density of water. Round to two decimal places when appropriate.
A. 0.57 J B. 1.78 J C. 2.84 J D. 42.24 J
Convert the angle from degree measure to radian measure. Round to the nearest hundredth of a radian when appropriate.-45°
A. - 
B. - 
C. - 
D. - 
Tell whether the statement is true or false.0 is a natural number.
A. True B. False
Solve the polynomial inequality. Express your solution on a number line using interval notation.(x - 7)3(x + 5)2(x - 5) ? 0
A. (-?, -5] ? [7, ?)
B. (-?, 5] ? [7, ?)
C. [-5, 7]
D. [5, 7]