Joel's family has four more pets than Brian's family. Together the two families have at least 7 pets. Let x represent the number of pets Brian's family has. Which inequality can be used to find the possible numbers of pets Brian's family has?
A) x + 4 ≥ 7
B) 2x + 4 ≥ 7
C) 2x + 4 ≤ 7
D) 2x - 4 ≥ 7
E) 2x - 4 ≤ 7
The cost in dollars, C, of renting a carpet cleaner is given by the linear equation
C = 20 + 25x, where x is the number of days.
Use this model to find the cost of renting the unit for 11 days.
Kevin won six times as many games as Joanne did. Which equation expresses this mathematically?
A) j = 6k
B) k = 6j
C) j + k = 7
D) k - j = 5
E) j = k - 6