Pls help and explain thxs

x = 12

Step-by-step explanation:

Hi,

This is a right angle. That means that the sum of those two equations adds up to 90 degrees.

x + 42 + 3x = 90

Combine like terms...

4x + 42 = 90

Subtract 42 on both sides...

4x = 48

Divide by 4 on both sides...

x = 12

I hope this helps :)

x= 12

Step-by-step explanation:

Seeing that this is clearly a right angled triangle, it will add up 90 degrees. This being said, by minus 42 from 90, the remaining is 48. And by adding up the exes, 4x will be obtained. And with a simple division, 48 ÷ 4x = 12. x=12

(2,9)

i think thats the answer i checked it on google

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value