Use a proportion to solve the problem.The ratio of the distances a 7-iron and a 5-iron will drive a golf ball is 5 to 6. If a golfer averages 155 yards with a 
how far should he average with a 
A. 144 yd
B. 129
yd
C. 186 yd
D. 166 yd
Answer: C
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Solve the problem.A company makes a very durable product. It sells 20,000 in the first year, but will have diminishing sales due to the product's durability, so that each year it can expect to sell only seventy-five percent of the quantity it will have sold the year before. How many of the product can the company expect to eventually sell?
A. 26,667 B. 40,000 C. 35,000 D. 80,000
Translate the problem to a system of equations, then solve using matrices.A croissant, a cup of coffee, and a fruit bowl from Kelley's Coffee Cart cost a total of $5.50, and a croissant costs twice as much as a cup of coffee. Kelley posts a notice announcing that, effective next week, the price of a croissant will go up 15% and the price of coffee will go up 15%. After the increase, the total price of the purchase will be $5.84. Find the cost of each item before the increase.
A. A fruit bowl costs $3.25, a croissant costs $1.73, and a cup of coffee costs $0.86. B. A fruit bowl costs $3.25, a croissant costs $1.50, and a cup of coffee costs $0.75. C. A fruit bowl costs $3.25, a croissant costs $0.86, and a cup of coffee costs $1.73. D. The prices cannot be determined from the given information.
Solve the problem.Tom and Larry are food inspectors at a cookie making company. Tom tests every 16th batch of dough for fat percentage. Larry tests every 28th batch of dough for carbohydrate percentage. If they both start working at the same time, which batch will be the first that they both test?
A. The 112th batch B. The 28th batch C. The 56th batch D. The 224th batch
Determine if the matrix is in row-echelon form.
A. Yes B. No