The solution is....................
One way to find the y int is to sub in 0 for x and solve for y
-3x + 9y = -54
-3(0) + 9y = -54
9y = -54
y = -54/9
y = -6....so ur y int is -6 or (0,-6)
Answer: 
Step-by-step explanation:
<u>Given function</u>
f(x + 1) = x + 2
<u>Isolate [ x + 1 ] on the right-hand side</u>
f(x + 1) = x + 1 + 1
f(x + 1) = (x + 1) + 1
<u />
<u>Substitute [ x + 1 ] with x</u>
f(x) = x + 1
<u>Substitute [ x ] with [ x - 1 ]</u>
f(x - 1) = (x - 1) + 1

Hope this helps!! :)
Please let me know if you have any questions
Answer:
21
Step-by-step explanation:
Hey there! I'm happy to help!
If something is 11 less, we are subtracting 11.
-11
We have 11 less than seven times a number x.
7x-11
The word is means equals.
7x-11=-4
Now we need to isolate the x. We add 11 to both sides.
7x=7
We divide both sides by 7.
x=1.
Have a wonderful day! :D