The mean of four numbers is 7. Three of the numbers are 5, 7, and 7. What is the fourth number? Show your work.

the fourth number would be 9

Step-by-step explanation:

the last number  would be 9 because if you know the mean is 7 and there are 4 numbers then you multiply 4*7 then subtract 5, 7 and 7 to get 9

1/3 + 1/5 = 8/15.

step-by-step explanation:

hope it

step-by-step explanation:

f(x)=2x^2 -1 

translation is a function transformation that transform the function in a way of translating. by translating the function its graph is moved  up an down. moving the function f(x) 2 units to the left will be the new function g(x) with the equation: g(x)=f(x+2)=2(x+2)^2 -1