Summative 4 Math

3x +6 = 18

• x = 4

• x = 3

8x -5 < 11

• x < 2

• x < 1

3y -8 = 1

• y = 3

• y = 4

2x -5 < 3

4y + 7 ≥ 15

3a + 8 = 20

2b -6 = 10

Alex is saving money for a trip. He currently has $100, and he saves $10 per week from his allowance. Let x represent the number of weeks. Write an inequality to represent the situation if Alex wants to have at least $250 for the trip.

Two brothers bought together 10 books. One bought 6. How many books did the other brother buy?

Maria's age is three times her daughter's age. The sum of their ages is 46. How old is Maria's daughter?