Add.15 + 2 + (-13)
A. 30
B. 0
C. 26
D. 4
Answer: D
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Factor the expression completely.A circular pool is surrounded by a concrete walk. The area of the concrete around the pool is 
A. ?(R - r)2 B. ?(R2 - r2) C. (?R + ?r)(R - r) D. ?(R + r)(R - r)
Solve the problems.Under typical conditions, 1
ft of snow will melt to 2 in. of water. To how many inches of water will 1
ft of snow melt?
A. 2
in.
B. 2
in.
C. 2
in.
D. 3
in.
Provide an appropriate response.Suppose that f(x) is a linear function with slope = -3 and y-intercept 
, then find the function f(x).
Fill in the blank(s) with the appropriate word(s).
When flowers known as "four-o'clock" are crossed, there is an incomplete dominance. A four-o'clock is red if the genotype is rr and white if it is ww. If rr is crossed with ww, a hybrid rw results. Suppose a population of 50% red four-o'clocks is mixed with a population of 50% white four-o'clocks. What percent of the population has each phenotype? ?
A. red 24%, pink 51%, white 25% B. red 25%, pink 49%, white 26% C. red 25%, pink 50%, white 25% D. red 22%, pink 49%, white 29% E. red 28%, pink 50%, white 22%