Question

0.2x + 0.4y = 1.7 and 8.3x - 6.3y= -4.3 how to solve using substitution or elimination and then get the y and x intercept for each one ?

Answer 1

step one is get rid of annoying decimals my multiplying by ten to get
\[2x+4y=17\]
\[83x-63y=-43\]

Answer 2

that helps a lot because the decimals are what were giving me a hard time. i am not sure why i have never thought to do that

Answer 3

should be easy now yes?

Answer 4

now would i multiply the first equation by 15.75 to eliminate the y variables ?

Answer 5

we got rid of the decimals, so forget about them

Answer 6

Wonder where 15.75 comes from..

Answer 7

this problem is ugly ugly ugly. your math teacher must hate you

Answer 8

i guess
\[15.75\times 4=63\] maybe

Answer 9

I thi)nk ur right, his math teacher hates him...:-

Answer 10

so that would clear the y's but make a huge mess with the calculation. there is nothing nice here. everything is relatively prime, so you just have to multiply it all out.

i got
\[x=\frac{899}{458}\]
\[y=\frac{1497}{458}\] but i cheated.

Answer 11

if i did this by hand i would have made a mistake no doubt about it.

Answer 12

Its an online college she does hate us.
I got 15.75 to elminate -63y.

when i do figure out the solution how should i go about getting the y and x intercepts ?

Answer 13

If u get full marks for the right answer, feed the equations into Wolfram.

What do u mean by the x and y intercepts for each one.._

Answer 14

I need the x and y intercepts for each of the initial equations after i find the solution set

Answer 15

If u just mean where the lines cut the x and y axes, that-s easy enough:

Just set x= 0 to get y and vice versa for each line.

Answer 16

thanks! i will keep trying with the problem