Solve the problem.Mr. Alexander earns a weekly salary plus a commission from his position as a salesman. One week his total compensation on sales of $4000 was $920. The next week his total compensation on sales of $1000 was $620. Find Mr. Alexander's weekly salary and his commission rate.
A. weekly salary: $1000
commission rate: 5.2%
B. weekly salary: $510
commission rate: 11%
C. weekly salary: $530
commission rate: 9%
D. weekly salary: $520
commission rate: 10%
Answer: D
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The letters x and y represent rectangular coordinates. Write the equation using polar coordinates (r, ?).2xy = 5
A. 2r cos ? sin ? = 5 B. r2 sin 2? = 5 C. r2 cos ? sin ? = 10 D. r2 sin 2? = 10
Write the equation in standard form of the line satisfying the given conditions.Through (0, 2); m = - 
A. 9x + 7y = -18 B. 7x - 9y = 18 C. 7x + 9y = 18 D. 7x + 9y = -18
Provide an appropriate response.The number of loaves of whole wheat bread left on the shelf of a local quick stop at closing (denoted by the random variable X) varies from day to day. Past records show that the probability distribution of X is as shown in the following table. Find the probability that there will be at least three loaves left over at the end of any given day. 
A. 0.20 B. 0.65 C. 0.35 D. 0.15
Translate the following statement to an expression or equation. Use x to represent the unknown value. Do not simplify or solve.The quotient of a number and 3, minus the product of 9 and the number is equal to the number plus 12.
A. 9x - 
= x + 12
B. 
- 9x = x + 12
C. 
= x + 12
D. 
+ 9x = x - 12