A triangle has an area of 20ft² the base is 10 feet. What's the height? (I'll give brainliest.)

Find the balance at the end of 4 years if 1000 is deposited at the rate of

Last one and the bottom answer choice is y=(x-4)^2+1 you guys!

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle.he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field