Math Help - hi need some help with this

any help would be cool

Hello,

Since the triangle is isosceles, the third angle will be x.

We know that the sum of the angles is 180. Here, it's 3x+x+x=5x.

Thus 5x=180, so x=...

Originally Posted by Moo

Hello,

Since the triangle is isosceles, the third angle will be x.

We know that the sum of the angles is 180. Here, it's 3x+x+x=5x.

Thus 5x=180, so x=...

cool thanks

also need some help with this too

John bought 3 shirts and 4 pairs of socks for $78.
Joan bought 2 shirts and 6 pairs of socks for $72.

Letting $x equal the price of a shirt and $y equal the price of a pair of socks, write a linear equation to represent each transaction.
Draw on the same axes the graphs of the two equations. Read off the co-ordinates of the point of intersection to find the values of x and y.

i came up with this
3x + 4y = 78

2x+ 6y = 72

im not sure how do the graph