Question

What is the value of y in the formula shown when x = 4/5 ?

y = 4/x x + √x + 0.2 - 5x
can i have a good explanation of how you got to the anwer as im hopeless at maths and still trying to figure out how you get the answer. thanks very much

Answer 1

x = 4/5 = 0.8

y = (4/x * x) + √x + 0.2 - 5x.

First, let's plug 0.8 in for x

y = (4/0.8 * 0.8) + √0.8 + 0.2 - 5(0.8)

(4/0.8 * 0.8) the 0.8s cancel out leaving just 4

y = 4 + √0.8 + 0.2 - 5(0.8)

5 * 0.8 = 4

y = 4 + √0.8 + 0.2 - 4

Add all the terms together

y = 1.09.