Answer:
x=3.5
Step-by-step explanation:
2.8/4=x/5
cross multiply
2.8(5)=4x
14=4x
x=14÷4
if they are equal then it would be 6.5
For #3 the slop is 4/3 .
The y intercept is -5.
So the equation is
y=4/3x -5
6510
7.75 x 840 = 6510