Answer:
Step-by-step explanation:
x = 1/2 ( a + b)
x = 1/2 (129 + 71)
x = 1/2 (200)
x = 100 °
you just have to remember that formula
Answer:
6/10
9/15
12/20
Step-by-step explanation:
Hi,
The answer is C)4 because you can just give 4 to x find it! If you need more explanation, you can comment below this answer!
Hope this helps :)
A group of related facts that use the same number is a fact family
Step-by-step explanation:
