X+20+10x=20+9x
adding like terms
x(10+1)+20=20+9x
11x+20=9x+20
subtracting 9x from both sides
2x+20=20
subtracting 20 from both sides
2x=0
dividing by two for both sides
x=0
Hiiiiii I really don’t know I have a glitch and your my only question
Answer:
Undefined
Explanation:
Anything over 0 is undefined
Answer:
8 students got an A
Step-by-step explanation:
31%+44% = 75% so that must mean 25% of the class got As. So 
Cross multiply and you'll get 800 = 100x, solve that and 8 is your answer. Hope this helps!
17.4
divide diameter
then use formula to find area of circle using the radius