So (my explanations suck, so bear with me on this), a car travels 452 miles--that is considered the "independent variable" i think, meaning, you cant do anything to that number. You just kind of leave it alone. You are trying to find how many miles per gallon. That tells you what the equation is. so the equation would be "13x = 452." See you are trying to find how many miles per gallon, and they give you the number of gallons (13) you used....oh geez, it's so hard to explain....i'm sorry.1. If a car traveled 452 miles on 13 gallons of gas, how many miles per gallon did the car average on the
a. 452x = 13
b. 452 = x – 13
c. 13x = 452
d. 13 + x = 452
Okay, so this one is saying there are two numbers, when multiplied together, you get 1692. So, one number will he called "x" the other, lets say, is "y." You're equation thus far would be okay? but they give you more...2. The product of two numbers is 1692. If the smaller number is 730 less than the larger number, find
the larger number.
a. x(x – 730) = 1692
b. x(730 – x) = 1692
c. 730x = x – 1692
d. x + x – 730 = 1692
Your smaller number ("y") is 730 less than the larger number ("x"). You would just substitute "y" for x-730, right? so your equation would be which is A....
Okay, so the repairman charges $60 just for calling. So you are automatically paying $60 bucks. The repairman also charges $30 for every hour he works. So, if "x" is the number of hours he works, then it would be "30x" in his case...3. An appliance repairman charges $60 for a house call, and $30 per hour for labor. How many hours is
the repairman estimating to work at your home if the quote for the total price is $127.50 and there is
no charge for parts?
a. 30x – 60 = 127.50
b. 30x + 60 = 127.50
c. 30 + 60x = 127.50
d. 30x – 127.60 = 60
You end up paying $127.50 after he's done. how many hours did this guy work? So, you know he charges $30 dollars per hour, so your equation would be BUT he also charged that $60 dollars just for calling, so it would be which is B.
Sorry for the sucky explanations. I bet someone can explain it better... Hope i helped though!