x is just a stand-in for an unknown/variable number, so we could use phrases like "a number," "a value," "an unknown," etc. Here, I'll use "a number." We can verbally refer to the result of subtraction as "the difference" as well, so we can write x - 6 in English as "The difference of a number and 6."
You need to re copy and paste it, I can’t see the full possible answers/question.
Answer:
0.609, 0.506, 0.165, 0.156
Step-by-step explanation:
Answer: x-intercept 13,0 y 0, 
Step-by-step explanation:
Let's use x to represent the number of hours since we don't know that.
750+250x<u><</u><u />2500
Subtract 750 from both sides.
250x<u><</u><u />1750
Divide both sides by 250.
x<u><</u><u />7
The most hours that they can do is 7, or it can be less.