It's gonna be the first answer
Step-by-step explanation:
x =7-y
subs x in eqn 2
3(7-y)+y=15
21-3y+y=15
21-2y=15
21-15=2y
6=2y
y=6/2
y=3
Answer:
Line ED
Step-by-step explanation:
First, looking at the diagram ED is the only line plane ADE and CED have in common.
Plane ADC touches both planes, but the intersection of 2 planes cannot be another plane.
Plane AEC is actually not a plane, I don't think. Could be wrong but regardless the same explanation as before.
Line AC does not touch both planes ADE and CED.
Line ED borders both AED and CED. It is inbetween the two planes, and is the only line in common between both planes.
Answer:
x > 0
Step-by-step explanation:
<u>Given </u><u>:</u><u>-</u><u> </u>
And we need to find the value of x for which the expression is defined . The expression is ,
√[3x²] ÷ √[4x]
As we can see that x is inside the squareroot. So for defining the expression the value of x should be Greater than 0 . As negative inside the squareroot will give rise to imaginary numbers.
<u>Solution </u><u>:</u><u>-</u><u> </u>
x > 0
<u>In </u><u>interval </u><u>notation</u><u> </u><u>:</u><u>-</u><u> </u>

<u>Therefore x should be Greater than 0 .</u>