Question

Explain how to get the answer?

Are the functions linear or nonlinear?

72 = x^3 + y

y + 1 = 5(x – 9)

7y + 2x = 12

4y = 24

Answer 1

https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-systems-topic/cc-8th-systems-with-substitution/v/the-substitution-method

Answer 2

Linear function is a line.

Answer 3

watch this

Answer 4

I can't help but this might