Answer:
Answer is A probably
Step-by-step explanation:
X2-x=20-2x
On comparison we can figure that out
Still I'm a 8th grader so my answer can be wrong
Answer:
66
Step-by-step explanation:
So the volume of a cone is 
r = 3
h = 7
2x+4-3x=0
-4 -4
2x-3x=-4
-1x=-4
_ _
-1 -1
x=4
so the answer is x=4
Answer:
(55,-23)
Step-by-step explanation:
You multitiply it and then divied it by that number.
Let's use x as the number of questions she answered correctly. If we make an equation of out the question, it would be 8.7x+13=108.7 To solve the equation subtract 13 from both sides. So it will leave you with 8.7x=108.7-13, which is 8.7x=95.7. Divide both sides by 8.7, which will give you x=11. She answered 11 questions correctly.
