Aconstruction worker is sent to the store to buy more than 30 lb of roofing nails. the nails are sold in 5 lb boxes and 10 lb boxes. the number of 5 lb boxes is represented by x, and the number of 10 lb boxes is represented by y.

which inequality models this situation?
(points : 1)
x + y > 30
x + y ≥ 30
5x + 10y > 30
5x + 10y ≥ 30

As part of an annual fundraiser to raise money for diabetes research, diane joined a bikeathon. the track she biked on was 1,920 yards long. diane biked 38.5 laps. her sponsors agreed to donate an amount of money for each mile she biked. how many miles did she bike? first fill in the blanks on the left side using the ratios shown. then write your answer. given ratios: 5280ft / 1 mi , 1 mi /5280 ft , 1,920 yards / 1 lap , 1 lap / 1,920 yards , 3 ft / 1 yard , 1 yard / 3 ft. blanks: 38.5 laps / 1 yard x (blank) x (blank) x (blank) = (blank) miles i'm really confused on how to do this, and the explanations aren't exactly . if you could walk me through how to do this, it would be greatly appreciated.

If 25% of y is 30, what is 60% of y?

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!