Solve the formula for the indicated variable.
+ 
= 
for R
A. R = R1R2(R1 + R2)
B. R = R1 + R2
C. R = 
D. R = 
Answer: C
Mathematics
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Graph the pair of parametric equations with the aid of a graphing calculator.x = t - sin t, y = 1 - cos t, -4? ? t ? 4? 
A. 
B. 
C. 
D. 
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Simplify the expression.
?
?
A. 
B. 0
C. ?
D. ?
E. already simplified
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Determine if the equation specifies a function with independent variable x. If so, find the domain. If not, find a value of x to which there corresponds more than one value of y.xy + 3y = -4
A. A function with domain all real numbers except x = -3 B. Not a function; for example, when x = -4, y = ±3
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Solve the polynomial equation by factoring and then using the zero product principle.10x3 + 70x2 + 120x = 0
A. {-4, -3}
B. {0, 4, 3}
C. {- 
, -3}
D. {0, -4, -3}
Mathematics