Simplify the expression.9x + 10x
A. 90x
B. 38x
C. 19x
D. 19x2
Answer: C
Mathematics
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Find the center and the radius of the circle.x2 + y2 - 6x = -14y - 42
A. (4, -8); r = 4 B. (3, -7); r = 5 C. (6, -7); r =4 D. (3, -7); r = 4
Mathematics
Using the factoring method, solve for the roots of the quadratic equation.20x2 + 4x = 0
A. x = 0, x = - 
B. x = 0, x = -5
C. x = 0, x = 
D. x = 0, x = 5
Mathematics
Convert. When necessary, round the answer to two decimal places.10 gallons = quarts
A. 5 B. 40 C. 160 D. 80
Mathematics
Perform the indicated operations and simplify the result. Leave the answer in factored form.
+ 
A. x + 2 B. x - 5 C. x - 2 D. x + 5
Mathematics