Which equation could be used to solve the following system?

Jamal walked 34 mile yesterday morning and 18 mile yesterday afternoon. What was the total distance walked by Jamal?

A company has found that the daily demand x for its boxes of chocolates is inversely proportional to the price p. When the price is $9, the demand is 1,800 boxes. Approximate the demand, in boxes, when the price is decreased to $2.25.

The mean age of three people is 22 and their median age is 20. the range of their ages is 16. how old is each person?

Jerry wants to make a call to Columbia. There's an initial cost of $1.30 for the first 3 minutes and $0.75 for every additional minute. If his call lasts 8 minutes how much will that cost him?

Tree A has a bright 8h-1 feet. Tree B has a height of 6h-11 feet. How much taller in feet is Tree A than Tree B?

The following is a geometric sequence. Find the next number in this sequence. 1, - 2, 4

Tamyra is making four cookies and has exactly four chocolate chips. If she distributes the chips randomly into the four cookies, what is the probability that there are no more than two chips in any one cookie?

Jessica had baseball cards she gave 3 to her friends she now has 9 baseball cards left how many baseball cards did she have to start with

The sum of 14 and a number is equal to 18

Dawson wrote the factorization 3 (power 2) times 5 (power 2). Without finding the actual number, how can you tell if the number is even or odd?