Compute the exact value of the function for the given x-value without using a calculator. f(x) = 5x for x = -1

a. 1/5
b. -1/5
c. 1/1
d. -5

Jackie purchased 3 bottles of water and 2 cups of coffee for a family for $7.35. brian bought 4 bottles of water and 1 cup of coffee for his family for $7.15. how much does each bottle of water cost? how much does each cup of coffee cost? i need this done

Compare the cost of the bike trips from the two companies shown. for both the cost in a linear function of the number of days which statements is true

For the inequality |c| < |d| to be true, which of the following must be true?