Let S=score on the second exam, then
(67+S+(S+7))/3=84
cross multiply
2S+74=252
2S=178
S=89
So second exam: 89
third exam=89+7=96
Check: (67+89+96)/3=84 ok.
Answer:
Step-by-step explanation:
3x^2 + 5x + 25 when x = 3
= 3(3)^2 + 5(3) + 25
= 3(9) + 15 + 25
= 27 +15 + 25
= 67
(Area of total floor) - (area of rug) = area of exposed wood.
(19ft x 15ft) - (pi r^2)=
(285) - [pi (4.5)^2]= 221.38 square feet
221.4 square feet
Answer:
i think its twelve nine and five
Step-by-step explanation:
not one hundred percent sure