The mean of 15 numbers is y. If each of the number is increased by 30, find the increase of the new mean in terms of y. The answer i found is 30 but it isn't in terms of y. is the question wrong

y+30

Step-by-step explanation:

the sum of the numbers is 15y

the new sum after increase each number by 30 is 15y+450

the new mean 15y+450/15

= y+30

constants mean the stopped points or the points on a graph that nothing is changing, hope this

step-by-step explanation:

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.