Question

4x+y=7 and 2x-4y=-10

i need the graphing, substitution and elimination. im so lost

Answer 1

graphing method: draw the graph of each function and check if there's an intersection. The intersection of these two functions will be their solution.

Substitution method: you have to rearrange one of the equations in terms of a variable and substitute the rearranged equation into the next equation. then solve for the other variable. after finding this variable, substitute this to the previous equation and solve for the other variable.

Elimination method: you just have to change one equation by multiplying a number on that equation that will eliminate one variable when you add the new equation to the second equation. Once you already eliminated one variable, you can easily solve for the other variable.

Answer 2

so do you have to do all those different methods? if yes, i'm willing to help you :) just tell me which part are you confused with.

Answer 3

yes i do. just the whole process is confusing. I get decimals and i dont know if theyre correct. im sorry its just super stressful :c

Answer 4

okay let's try to work this out. which method did you use?

Answer 5

for graphing i used the cover up method.
4x+y=7 i got Y=7 and X=1.8
for 2x-4y=-10 i got y=2.5 and X=-5

Answer 6

i think that will not work since you are solving for the solution of TWO equations. But if you're solving a solution of ONE equation, it will work.

Answer 7

so let's do the graphing first.
can you graph the first and second equation in the same coordinate plane?

Answer 8

-_-