Solve the inequality 31<3x + 4

x > 9

Step-by-step explanation:

31 < 3x + 4

Treat the < sign the same way you do with =

So first minus 4

31 < 3x + 4

-4 -4

27 < 3x

Divide both sides by 3

9 < x

If you want x on the other side just flip the symbol

x > 9

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,