I need help solving:
2x+5y=30
Yeah I need to put it in y= form.
To be able to graph it.
Thanks! :)
-Edward
2006-11-09 13:33:03 · 6 answers · asked by cursedconcept 3 in Education & Reference ➔ Homework Help
2x+5y=30
5y = -2x + 30
y = (-2x)/5 + 6
2006-11-09 13:34:56 · answer #1 · answered by matheson 2 · 1⤊ 0⤋
easy 2x+5y=30 subtract 5y
2x=-5y+30 subtract 30 from both sides
2x-30=-5y divide both sides by-5
-0.4x+6=y OR -2/5x+6=y
2006-11-09 13:42:36 · answer #2 · answered by iknowmy3tables 2 · 0⤊ 0⤋
2x+5y=30
=>5y=-2x+30
=>y= (-2/5)x+6 [Dividing all the terms by 5]
But to graph it you need not change it to y=mx+c form.You can draw a straight line by finding the co-ordinates of 3 points from the equation y=(30-2x)/5.Now for the values of x=0,5 and 10 you get the corresponing values of y=6,4 and 2.Now plot three points(0,6),(5,4) and (10,2) on the graph and join them by a straight line and extend it on either side.You get your graph of the equation
2006-11-09 15:31:46 · answer #3 · answered by alpha 7 · 0⤊ 0⤋
you need to get it in slope-intercept form right?
2x+5y=30
your formula is y=mx+b (m=slope,b=y-intercept)
5y= -2x + 30
when you cross the equals sign you change the sign of the number you are moving.your slope is -2 and your y-intercept is 30
2006-11-09 13:55:47 · answer #4 · answered by ^..^ 4 · 0⤊ 0⤋
If x=0, then y=6 and if y=0, then x=15. So your coordinates for the graph are (0,6) and (15,0)
2006-11-09 13:41:54 · answer #5 · answered by Halo 5 · 0⤊ 0⤋
dude this is easy!
2x + 5y = 30
5y = 30 - 2x
y = 6 - 2/5x
2006-11-09 13:40:56 · answer #6 · answered by sur2124 4 · 0⤊ 1⤋