Answer:
system of equations:

Step-by-step explanation:
I've attached an image with an explanation below, hope it helps!
Answer:
Money Ivan gets extra = 120 - 30 (or 3x) = 90
Step-by-step explanation:
Ivan = 4x
Tanya = 1x
Total = 150
4x + x = 150
5x = 150 ; x = 150 / 5 = 30
Ivan = 4x = 120
Tanya = 1x = 30
Money Ivan gets extra = 120 - 30 (or 3x) = 90
Answer: the last option (:
Step-by-step explanation:
You always put the slope in front of the x intercept in the equation.
It is prime, it can't be divided by anything, but itself and one.
Answer: A and C
Step-by-step explanation: