Answer:
he needs to get a 91 to have a mean score of 90
Step-by-step explanation:
add up all the known scores to get 629
let 's' = lowest test score
(629 + s) ÷ 8 = 90 [we divide by 8 because there are 7 known and 1 unknown score)
cross-multiply to get:
629 + s = 720
s = 720-629
s = 91
(12, 0)
12-9(0)=12
12-0=12
12=12
Answer:
2229 thanks, merry early Christmas
Answer:
a certain number that i do not know
Step-by-step explanation:
Step-by-step explanation:
The Circumference is:

Radius r is:

So,
