Respuesta :

height(h) = 7x

base(b) = 4x

Since you know the value of x, you can plug it in

h = 7(10) = 70in

b = 4(10) = 40in

[tex]A = \frac{1}{2}bh[/tex]

[tex]A=\frac{1}{2} (40)(70)[/tex]

[tex]A=\frac{1}{2} (2800)[/tex]

A = 1400in²