1. 5/6 3/8, least common denominator) 2. 1/3 2/7 least common denominator)

1.) The LCD is 24

2.) The LCD 21

Step-by-step explanation:

20/24 is equivalent to 5/6 and 9/24 is equivalent to 3/8

7/21 is equivalent to 1/3 and 6/21 is equivalent to 2/7

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!

m∠a is 90°

m∠b is 40°