Heather is a cashier. she can ring up 12 customers in 9 minutes. at this rate, how many minutes does it take her to ring up 4 customers?

12 customers = 9 mins

1 customer = 9 ÷ 12 = 3/4 min

4 customers = 3/4 x 4 = 3 mins

3 mins

x > 1.3

step by step:

8.5−0.9x> 9.8−1.9x

step 1: simplify both sides of the inequality.

−0.9x+8.5> −1.9x+9.8

step 2: add 1.9x to both sides.

−0.9x+8.5+1.9x> −1.9x+9.8+1.9x

1x+8.5> 9.8

step 3: subtract 8.5 from both sides.

1x+8.5−8.5> 9.8−8.5

1x> 1.3

step 4: divide both sides by 1.

1x/1 > 1.3/1