Solve the system by substitution.7y = 5x - 2
x - 
y = 
A. 
B. 
C. 
D. ?
Answer: C
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Solve the problem.A conical tank is resting on its apex. The height of the tank is 
, and the radius of its top is 
. The tank is full of gasoline weighing 
How much work will it take to pump the gasoline to a level 
above the cone's top? Give your answer to the nearest ft ? lb.
A. 775,848 ft ? lb B. 415,633 ft ? lb C. 83,127 ft ? lb D. 166,253 ft ? lb
Provide an appropriate response.Using Heron's formula, find the area of the triangle shown. Round the answer to four significant digits.
A. 64.18 m2 B. 37.35 m2 C. 36.57 m2 D. 4,118 m2
Solve the equation. Round to the nearest tenth, if necessary.A rock falls from a tower that is 416 feet high. As it is falling, its height is given by the formula h = 416 - 16t2. How many seconds will it take for the rock to hit the ground (h=0)? Round to the nearest tenth of a second.
A. 20.4 sec B. 5.1 sec C. 10,816 sec D. 20 sec
Write the linear system corresponding to the reduced augmented matrix.
A. No Solution B. x1 = 4, x2 = 0 C. x1 = -4, x2 = 0 D. x1 = 4, x2 = t for any real number t