Solve the problem.The amount of water used to take a shower is directly proportional to the amount of time that the shower is in use. A shower lasting 25 minutes requires 12.5 gallons of water. Find the amount of water used in a shower lasting 10 minutes.

A. 20 gallons
B. 31.25 gallons
C. 1.25 gallons
D. 5 gallons


Answer: D

Mathematics

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Express the following number in scientific notation: 0.0317

a. 3.17 ð 10-2 b. 31.7 ð 10-3 c. 3.17 ð 10-2

Mathematics

Use the given table or graph to write the inequality described.Use an inequality to compare the number of grams of fat in tuna salad and a bowl of soup.

A. 22 > 3 B. 350 > 155 C. 3 > 22 D. 155 < 350

Mathematics

Solve the equation by completing the square.a2 - 4a - 21 = 0

A. , - 
B. -18, -3
C. 7, -3 
D. -7, 3 

Mathematics

Solve the inequality. Graph the solution set and write the solution set in set-builder notation.(x + 7)(x + 1) > 0

A. {x|x < -7 or x > -1}


B. {x|-7 ? x ? -1}


C. {x|-7 < x < -1}


D. {x|x ? -7 or x ? -1}


Mathematics