I REALLY NEED AN ANSWER! WILL MARK BRAINLIEST Misha solves the following system of equations using the substitution method.

y=5−2x
3x−y=15

What is the single-variable equation she solves after substituting?

A. 3(5+x)=5−2x

B. 15+3x=5−2x

C. 3x−(5−2x)=15

D. 3x−5−2x=15

Ineed to learn how to solve this problem

Gexpressions: practice question 3 of 5 jackson wants to study the popularity of his music video by tracking the number of views the video gets on his website. the expression below represents the total number of views that jackson's video receives n days after he begins tracking the nu views, where b is the rate at which the number of views changes. alb)" select the statement that would accurately describe the effect of tripling a, the initial number of views before jackson beginst the rate at which the number of views changes, b, will triple. the total number of views the video has after n days, a(b)", will not change. the total number of days since jackson begins tracking views, n, will be reduced by one-third. the total number of views the video has after n days, alb)", will triple. submit

Over the course of the school year, you keep track of how much snow falls on a given day and whether it was a snow day. your data indicates that of twenty-one days with less than three inches of snow, five were snow days, while of the eight days with more than three inches of snow, six were snow days. if all you know about a day is that it is snowing, what is the probability that it will be a snow day?