What is the slope of a line parallel to the line whose equation is y - x = 5?

Solve for x -2.3(r - 1.2 ) = -9.66 enter you answer as decimal.

25 ! i need asap! ! ill mark brainliest!

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?