<PRE><B>Question 924157</B>
x = sum of all 5 numbers
y = sum of first 4 numbers
---
x/5 = 50
y/4 = 40
---
x = 50*5
y = 40*4
---
x = 250
y = 160
---
answer:
5th number = x - y
5th number = 250 - 160
5th number = 90
---
Solve and graph linear equations:
https://sooeet.com/math/linear-equation-solver.php
---
Solve quadratic equations, quadratic formula:
https://sooeet.com/math/quadratic-formula-solver.php
---
Convert fractions, decimals, and percents:
https://sooeet.com/math/fraction-decimal-percent.php
---
Calculate and graph the linear regression of any data set:
https://sooeet.com/math/linear-regression.php</PRE>