PreAlgebra
posted by 8th Grade .
How do you solve this PreAlgebra problem:
$1.25x + $2.25y = $916
x + y = 560

PreAlgebra 
Anonymous
This is a system of equations. There are three ways you can solve these types of problems, graphing, substitution, or elimination. I'll use eliminations for this one. Elimination means that you try to eliminate one of the variables.
First, I multiply the second equation by 1.25:
1.25x + 2.25y = 916
1.25x + 1.25y = 700
Now, subtract the two equations:
1y = 216
y = 216
Substitute 216 into y of one of the equations:
1.25x + 2.25(216) = 916
1.25x + 486 = 916
1.25x = 430
x = 344
The answer is (344, 216).
Check your answer by substituting these values into the equations:
1.25(344) + 2.25(216) = 916
Yes
344 + 216 = 560
Yes 
PreAlgebra 
S
the ratio of the length to the width of a rectangular field is 3 to 2, if the field is 120 yards long, how wide is the field.
Respond to this Question
Similar Questions

algebra
complete factorization y^425y^2+144 (^) denotes following number is Power y^4  25y^2 + 144 You might try replacing y^2 with x. Therefore your statement becomes: x^2  25x + 144 ...which is easier to factor. 
prealgebra
kk my teach told me to describe and draw things that are about prealgebra and she told me to write what prealgebra is... so can anyone help me? 
pre algebra
how do you solve this problem r²11r+24= 
prealgebra
I can not solve this problem: 3/4 =5/x 
Prealgebra
how would I solve this kind of problem 7/94/9=y/3? 
PreAlgebra
The treasurer of the student body at a college reported that the receipts from a recent contact totaled $916; Furthermore, he announced that 560 people had attended the concert. Students were charged $1.25 each for admission to the … 
algebra
what is the system of equation of: 0.25x+0.15y=2.5 1.25x1.25y=7.5 
Prealgebra
How would you solve this problem? (s4/9)(2/3)=4/5 
Math PreAlgebra
How would you solve this problem? (s4/9)(2/3)=4/5 
prealgebra
I am actually in 6th grade but I really want to learn more about pre algebra. I was given a task to solve the question of y=9x+3*7 and i don't get what to do. Should I graph?