Answer:
80
Step-by-step explanation:
Here you go enjoy
Have a good rest of your night
Answer:
89/100
Step-by-step explanation:
The average weighted by the number of students is ...
(90(0.90) +10(0.80))/100 = (81 +8)/100 = 89/100
I think they both increased by 3 and the new dimensions is 8 ft by 7 ft