Homework Help: Mat 116

Posted by Robin on Sunday, April 11, 2010 at 4:52pm.

substitution method
7x +9y= 19
x=25-5y
___________
7(25-5y)+9=19
175-35 +9=19
-175 -175
_______________
-26y= -156
y=6
substitute for x
x=25-5y
x=25-5(6)
x=25-30
x=-5
now substitute
7x+9y=19
7(-5)+ 9(6)=19
-30+56=19
19=19 his part is wrong I believe explain if I need to do this differently?

Mat 116 - bobpursley, Sunday, April 11, 2010 at 4:56pm
The last lines...

7(-5)+9(6)=19
-35+54=19
19=19

You made two math errors on yours
Mat 116 a - rena, Saturday, July 23, 2011 at 6:18am
Anwers to math week 6 uop

Answer this Question

Related Questions

Mat 116 - substitution method 7x +9y= 19 x=25-5y I read over all the problems I...
Pre-Calc - I am having a great deal of difficulty with this problem. An open box...
algebra - Am i doing this right? - 5y^3(y^5)2 _______________ 10y^5(y^2)^6 5y^3...
Math: Algebra - 1. Which method would be the simplest way to solve the system? ...
PRE CALCULUS - V = x(16-2x)(19-2x) = 175 ft³ Ok, thanks. Now I'm trying...
Math 116 - Q1) there are two plans available, but they only have 38 homes ...
Math - 7x+5y=175 x+y=23
mathematics - the area of a rectangle is 175 and the length is 1 and a half ...
Algebra - Elimination method: x+5y=-13 2x-5y=-19 ( , )
math - Solve using elimination method x+5y=21 -x+5y=19

For Further Reading

First Name:
School Subject:
Answer: