Question

josie is buying egg rolls and crab rangoos each role cost $1.25 and each crab rangoons 0.50 the realitionship between the number of egg rolls e and the number of crabs rangoons c and the total cost is 1.25+0.50c=8 calutate tge number of crab rangoons joise is she buying the following amount of egg rolls 1. 4 egg rolls 2.2egg rolls

Answer 1

the equation is

`1.25\text{ e + 0.50 c = 8}`

Clearing c, we have

`c\text{ = }\frac{8-1.25\text{ e}}{0.5}\text{ }`

So we just need to make the substitutions. The first one is e = 1.4, so we will have

`c=(8-1.25(1.4))/(.5)=12.5\text{ crabs rangoons}`

For the second one, we have e=2.2

`c=(8-1.25(2.2))/(.5)=10.5\text{ crabs rangoons}`

In the second one, we start with 124 lt of water and we add 9 lt per minute (I think, it doesn't say). So, in this case the equation is

`L\text{ =124+9t,}`

where L is the number of liters of water and t is the time in minutes. First we are asked for the first 4 minutes, so we have

`L\text{ = 124+9(4) = }160\text{ lt after the first 4 minutes}`

Then, after the first 80 minutes we have

`L\text{ = 124+9(80) = }844\text{ lt in the first 80 minutes}`