Which choices are in the solution set of the equation below? Check all that apply.
4x = 30
A. 7.5
O B. 6
| C. 8,5
DD. 6.5
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When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.

The answer is that the rate of change is $50 per 1 monthhope this ; )