Question

18. Xander's water bottle has 15.4 oz of water

in it and Xander is drinking 0.5 oz of water

each second. Leon's water bottle has 5.4 oz of

water in it and Leon is adding 0.75 oz of water

each second.

Write an inequality that could be used to find

the number of seconds it will take for

Xander's water bottle to have a fewer number

of ounces than Leon's water bottle.

Answer 1

15.4 - 0.5t < 5.4 + 0.75t

for t > 8, Xander's bottle contains less water

Explanation:

Xander: 15.4 - 0.5t, where t is the number of seconds

Leon: 5.4 + 0.75t

Inequality: Xander < Leon, so

15.4 - 0.5t < 5.4 + 0.75t

Simplify:

10 < 1.25 t

t > 10/1.25

t > 8