Answer:
the second one
Step-by-step explanation:
45 and 105, you can put the equation as 3x+7x=150. Add them to 10x then divide, x=15 so 3*15=45, and same for the other number.
Question 1:
c2=a2+b2
c2=5(squared)+7(squared)
c2= 25+49
c=74
c=

question 2:
c2=a2+b2
c2=24(squared)+18(squared)
c2=576+324
c=900
c=
Mean is a form of average, and in order to find this we add up all the numbers then divide by the amount of numbers we have.
So, we have 5 numbers here. (8, 17, 9, 3, and 13)
8 + 17 + 9 + 3 + 13 = 50
50/5 = 10
The mean of those five numbers is 10.