Let x be the fifth number

⇔

⇔ 23.3 + x = 34
⇔ x = 10.7
#9
3/8 x 4/11 = 3/22
#12
9/20 x 4/5 = 9/25
Answer:
33/2
Step-by-step explanation:
6 1/2 ---> 13/2
10 ---> 20/2
13/2 + 20/2 =
33/2
Answer:
Do you have the math exercices? I am sorry but I can just help in the subjects concerning math. It is been some time since I studied biology and other high-school subjects.