Solve each equation.
1) -1/8v= 5/2
2) 6/5 = D / (5/4)
Need answer ASAP

If you answer right ill give brainliest, : )

Lines a and b are parallel. what is the value of x? -5 -10 -35 -55

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?