hi, i’m not good at this...at all so if you could please add in an explanation so i can understand better would be great!

1. x=74

2. x=86

Step-by-step explanation:

1. the sum of interior angles in a triangle is 180 degrees

81 + 25 + x = 180

106 + x = 180

x = 74

2. once again the sum of interior angles in a triangle is 180 degrees so add up the terms and set them equal to 180

x + x-35 + 43 = 180

add up like terms (x and x, -35 and 43)

2x +8 = 180

2x = 172

x = 86

question 1 is 8, question 2 is 9, question 3 is 24

step-by-step explanation:

now, the numbers they give you at the top are the key. from there, you just have to plug and chug! let's try 1, 2, and 3!

key: a=3, b=5, c=6

1. a+5

remember, a=3, so we plug that in to get 3+5=8

2. 15-c

c=6, so we plug that in to get 15-6=9

3. 4b

b=6, so we plug it in to get 4*6=24

time to try the rest on your own! if you put the answers below in a comment, i'll check them for you!