220=A+S (adult plus student)
s=220-a
2.50a+1.50s=465
1.50s=-2.50a+465
s=-1.67a+310
then set those equal to each other
220-a=-1.67a+310
220=-.67a+310
-90=-.67a
.67a=90
a=60
then put a back into the first equation
220=S+A
220=s+60
s=160
a=60, s=160
To calculate mean: Just add up all the numbers, then divide by how many numbers there are.345 + 673 + 728 +775 + 822 +827 +839 + 951 = 5960/8 = 745
633 + 673 + 728 +775 + 822 +827 +839 + 951 = 6248/8 = 781781- 745 = 35 It increases by 35To find the Median, place the numbers in value order and find the middle. BUT, with an even amount of numbers things are slightly different. In that case we find the middle pair of numbers, and then find the value that is half way between them. This is easily done by adding them together and dividing by two. 345 673 728 775 822 827 839 951 The median = 822-775 /2
The median =23.5After the change633 673 728 775 822 827 839 951 The median = 822-775 /2
The median =23.5The median stays the same.
Answer:
x=7 and y=17
Step-by-step explanation:
Let's start by calling the center of the parallelogram O
In a parallelogram diagonals bisect meaning that BO = OD and similarly CO=OA
BO=OD
4x-8=20 (Just subsituting values for BO an OD)
4x=28
x=7
CO=OA
2y-6=28 (Subsituting values for CO and OA)
2y=34
y=17
So...
x=7 and y=17
262 baby the answer to your question
In 8 years both salaries will be the same
28+3x=36+2x
since we want to see when they will be the same we set them equal to each other, first subtract 28 and what you do on one side you have to do to the other so subtract 28 from 36 aswell, then you'll get 3x=8+2x so subtract 2x from both sides to get x=8 then thats your answer