Write the English phrase as an algebraic expression. Let x represent the number. Simplify the expression, if possible.Three times a number decreased by 7
A. 
B. 3x - 7
C. 3 - 7x
D. 3x + 7
Answer: B
Mathematics
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Solve the problem.Find a curve through the point (0, 5) whose length integral, 0 ? x ? 1, is L = 
A. y = x2 B. y = x2 + 5 C. y = 2x + 5 D. y = x
Mathematics
Add or subtract as indicated.-3.48 - (-7.424)
A. 4.044 B. 3.944 C. 3.943 D. 3.954
Mathematics
Factor the polynomial completely. If the polynomial cannot be factored, write "prime."81x - x5
A. x(9 + x2)(3 - x)(3 + x) B. x(x2 - 9)2 C. x(x2 + 9)2 D. prime
Mathematics
In a right triangle, find the length of the side not given. Let c represent the length of the hypotenuse. Give an answer to the nearest tenth if necessary.b = 7 yd, c = 14 yd
A. a = 7 yd B. a ? 12.1 yd C. a ? 9.9 yd D. a ? 4.6 yd
Mathematics