1) Redueix termes semblants:
2x - 3 + 15x + 8 =
-3x + 11 + x =
x + 4 - 7x - 9 + x =
x + y + 1 + 2x - 2y - 2 =

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

Having a hard time understanding this question (see attachment).

The average daily maximum temperature for laura’s hometown can be modeled by the function f(x)=4.5sin(πx/6)+11.8 , where f(x) is the temperature in °c and x is the month. x = 0 corresponds to january.what is the average daily maximum temperature in may? round to the nearest tenth of a degree if needed.use 3.14 for π .