You have to multiply the 6 by both s and -9
So you will get 6s - 54 which is the answer
Answer:
it would be in the fourth quadrant, directly underneath where it is now. the base would be c and d
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
