Multiply.
? 
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Solve.From a 20-inch by 20-inch piece of metal, squares are cut out of the four corners so that the sides can then be folded up to make a box. Let x represent the length of the sides of the squares, in inches, that are cut out. Express the volume of the box as a function of x.
A. V(x) = 2x3 - 60x2 B. V(x) = 2x3 - 60x2 + 20x C. V(x) = 4x3 - 80x2 D. V(x) = 4x3 - 80x2 + 400x
Mathematics
Simplify the expression. Assume that all variables represent nonnegative numbers.7
+ 5
A. 12
B. -2
C. 12
D. 12
Mathematics
Solve.36 = 7x - 6
A. 6 B. 39 C. 35 D. 11
Mathematics
Translate the phrase into a mathematical expression and then find the result.78 cups decreased by 23 cups
A. 78 - 23; 55 cups B. 78 - 23; 45 cups C. 78 + 23; 91 cups D. 78 + 23; 101 cups
Mathematics