Use the Gauss-Jordan method to solve the system of equations. If the system has infinitely many solutions, give the solution with y arbitrary.2x + 5y = -7-6x - 15y = 21
A. {(-1, -1)}
B. ?
C. 
D. 
Answer: D
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A grand tour of four cities begins at city A and makes successive stops at cities B, C, and D before returning to city A. If the cities are located as shown in the following figure, find the total distance covered on the tour.
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?
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__________mi
Fill in the blank(s) with the appropriate word(s).
State the dimensions of the matrix.
A. 15 B. 3 × 5 C. 5 × 3 D. 1, -1, -3, -2, -8, 1, 3
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%
Find the compound amount for the deposit. Round to the nearest cent.$7000 at 12% compounded annually for 5 years
A. $12,336.39 B. $10,360.00 C. $11,014.64 D. $11,200.00