Step-by-step explanation:
ok so for number 1 you first have to group the like terms therefore you will now have:
9r-4r+8-6
and now you calculate:
9r-4r=5r
8-6=2
so that means 5r-2 is simplied version for no.1
for number you 2 you first multiply why is inside the brackets by what is in the outside:
2(x+3y)
2x+6y (simplified version)
hope this helps! no problem
The second one should by right
Area ≈ 12.57
Circumference ≈ 12.57
Answer:
2n-4
Step-by-step explanation:
You're subtracting 4 from the product of n times 2
