Question

Help plz with Algebra question I attached a file

Answer 1

x=4.63

Explanation:

Area = (1/2) (base) (height)

20 = (1/2) (x+4) (x)

40 = x²+4x

x²+4x-40=0

Put in quadratic equation:

x=
`\frac{-4(+/-)\sqrt{4^(2)-4(1)(-40) } }{2(1)}`

x=
`(-4(+/-)√(176) )/(2)`

x=4.63324958071 or x=-8.63324958071

Since x can't be negative in this case we take our answer to be 4.63324958071, which rounds to 4.63