I need help on this plz help

5 carwashes, Josh: $ 100 savings, Sandra: $100 savings

Step-by-step explanation:

First we need to find each of their formulas.

Formula for Josh: 50+10c=s

Formula for Sandra:25+15c=s

We can set these two to be equal to each other in order to find how many carwashes it takes for them to have the same amount of money.

50+10c=25+15c

25+10c=15c

25=5c

c=5

after 5 car washes, they will have the same amount of money.

now that we know that, we can plug that into each equation to find each of their savings after the 5 carwashes.

Josh's savings:

50+10c=s

plug in the amount of carwashes,

50+10*5=s

50+50=s

s=100 dollars of savings for Josh

Sandra's savings:

25+15c=s

plug in the amount of carwashes,

25+15*5=s

25+75=s

s=100 dollars of savings for Sandra

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations: