Simplify.
A. 77
B. 7
C. 11
D. 23
Answer: B
Mathematics
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Find an equation for the line tangent to the curve at the point defined by the given value of t.x = t, y = 
, t = 18
A. y = 
x
B. y = - 
x - 3
C. y = - 
x
D. y = 
x + 3
Mathematics
Solve the equation.0.21(x + 20) + 0.34(x + 30) = -13.1. (Round to the nearest whole number, if necessary.)
A. {-10} B. {10} C. {50} D. {-50}
Mathematics
Multiply.-7(12x - 4)
A. 12x + 28 B. -84x + 28 C. -84x - 4 D. -56x
Mathematics
Solve the problem.The resistance of a wire varies directly as the length of the wire and inversely as the square of the diameter of the wire. A 20 foot length of wire with a diameter of 
has a resistance of 
What would the resistance be for a 
length, with diameter 
of the same kind of wire ?
A. 702 ohms B. 690 ohms C. 683 ohms D. 687.5 ohms
Mathematics