What the answer fast now

x = 12.9

Step-by-step explanation:

Since this is a right triangle, we can use trig functions

cos theta = adj / hypotenuse

cos 72 = 4/x

x cos 72 = 4

x = 4/ cos 72

x = 12.94427191

x = 12.9

the answer would be 1 1/72

step-by-step explanation:

you can rewrite the equation by separating the parts and then solving individually:

10-9=1

1/8 - 1/9=

find l c d and then combine:

1 1/72