How do you solve an inequality?

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Presentation transcript:

How do you solve an inequality? 2x + 7 > y

> greater than < less than ≥ greater than or equal to ≤ less than or equal to

Addition and subtraction are inverse operations. 5 x 2 = 10 10 ÷ 2 = 5 5 + 3 = 8 8 – 3 = 5 Addition and subtraction are inverse operations. 5 x 2 = 10 10 ÷ 2 = 5 Multiplication and division are inverse operations.

Determine how many t-shirts Debbie can purchase. Debbie has at most $60 to spend on clothes. She wants to buy a pair of jeans for $22 and spend the rest on t-shirts. Each t-shirt cost $8. Determine how many t-shirts Debbie can purchase.

22 + 8x ≤ 60 x ≤ ?

22 + 8x ≤ 60 8x ≤ 38 x ≤ 4.75 x ≤ 4 shirts

Steven had $25 to spend. He spent $10 Steven had $25 to spend. He spent $10.81, including tax, to buy a new DVD. He needs to save $10 but he wants to buy a snack. If peanuts cost a quarter per package, including tax, what is the maximum number of packages he can buy? Use inverse operations to solve the inequality.

Devon needs at least 150 points to win a prize Devon needs at least 150 points to win a prize. He earned 45 points during round 1 and each time he wins a game in round 2 he will earn 17 points. Write and solve the inequality to determine the amount of times he will win during round 2.

Eric is finding money in his coin jar to go to the carnival Eric is finding money in his coin jar to go to the carnival. He wants to spend no more than $13 there. He brings $8 in bills and some quarters. Write and solve the inequality to determine the amount of quarters he could bring so he spends no more than $13.