Answer: The answer is 10 students.
Step-by-step explanation: Well first you know 15 take both so you can just subtract 15 from one of the numbers because the same student does not need to be counted twice. I chose to do 35-15 which equals 20. Then you do 60+20 to get 80. Lastly you subtract 80 from 90 to get 10.
I'm gonna go ahead and say I may not be correct because I don't know everything, but I answered to my best ability and got 10.
Answer:
please look at the attached picture and I hope you understand because I made it really easy to understand
Answer:
DF=20
Step-by-step explanation:
=
Use cross Multiplication
9DF=180
Divide 180 by 9
DF=20
Hope this helps! :)
(4x+5)(4x-5) is equal to 16x^2+20x-20x-25
The positive and negative 20x cancel out
Leaving you with: 16x^2 - 25
[S/N this is a pattern that shows up a decent amount. Whenever you have something that looks like (x^2-y^2) it factors out to (x+y)(x-y). It might be helpful to remember]
The next one, (4x+5)2, just follows the distributive property. Multiply both components within the parentheses bye the coefficient of 2: 8x+10
range{-2,00)
Step-by-step explanation: