Answer:21 cm
Step-by-step explanation: The circle's circumference is 84 cm. 84 / 4 = 21. Therefore the length of the arc XY is 21 cm.
Answer: 39
Step-by-step explanation:
30-8=22
22/2=11
11+2=13
13 times three is (39)
Average: about 87%
Her english grade affects her average because it is the lowest out of all of the grades which brought her average grade down.
not sure about this: To bring her average higher, she should probably try more in english or study. (not sure about this one)
Step by Step:
Add up all of her scores:
86 + 72 + 93 + 87 + 93 + 100 + 80
it equals 611
Since we added up 7 scores, we divide 611 by 7
611 divided by 7 is 87.285...
So her average is about 87%
Answer:
-6n -(3n - 9) + 5n = -4 (2n - 8)
-6n -3n +9 +5n = -8n +32
-9n +5n +9 = -8n +32
-4n + 9 = -8n +32
8n - 4n = 32 - 9
4n = 23
n = 23/4 = 5.75
2 because it is the only degree there in the problem
