Answer:
21+3x
Step-by-step explanation:
multiply the 3 by everything inside the parentheses
Y=2x^3 is nonlinear, since it's a cube equation. y=x+5 is linear, because it's a line with y intercept (0,-5) and slope 1. y=\sqrt(x-5) is nonlinear, because it's a quadratic equation when reversing x and y. 5x+5y=25 is equal to x+y=5 ot y=-x+5, which is also linear. y=x^2/2 is a quadratic equation, so it's nonlinear.
k-3+3<5+3 is the explanation and the answer is k<8
A is 6 because so is the side across from it
And B is 8 because it the same size just flip it
Brainliest would be appreciated
