2x-y-3z=7, 3x+y+=10, 5x+y+2z=15

What is the value of a? 5/6 (a-8) = 7 Enter your answer in the box.

Rita travel 1250 miles in the first 3 days of a trip. At this rate, how long will it take her to travel 1875 miles

Karen purchased a prepaid phone card for $30. Long distance calls cost 16 cents a minute using this card. Karen used her card only once to make a long distance call. If the remaining credit on her card is $24.

Morgan has 158.62 in his checking account, and writes 5 checks to pay bills for 19.45 each. What is his new balance in the account?

What is the steph to calculate the volume of a prism

An election ballot asks voters to select four city commissioners from a group of sixteen candidates. In how many ways can this be done?

A high school baseball team averaged 800 fans for each of its seven home games. What is the order of magnitude of the total attendance? A. 4 B. 3 C. 2 D. 5

Round 494 to the nearest ten

Two fair dice are tossed. a. What is the probability that the sum of the number of dots shown on the upper faces is equal to 7? To 11? b. What is the probability that you roll "doubles" that is, both dice have the same number on the upper face? c.

Least common multiple of 78 90 140