Can someone help me with this please?

x = 35°

Step-by-step explanation:

A straight line has an angle of 180 degrees.

Both the 40 degrees's add up to 80, subtract that from 180 and your missing 100.

Meaning (2x + 30)° must equal 100.

2x + 30 = 100       Subtract both sides from 30

2x = 70      Divide both sides from 2 to isolate the variable

x = 35°

3< x< 5

step-by-step explanation:

|x - 4| < 1

there are two solutions, one positive and one negative.   remember to flip the inequality when taking the negative solution

x-4 < 1       x-4 > -1

add 4 to each side

x-4+4 < 1+4       x-4+4 > -1+4

x< 5                 x> 3

3< x< 5

im pretty sure its

(8,15)

step-by-step explanation: