Answer:
The mean of the combined group is 76.67 ≈ 77
Step-by-step explanation:
- The sum of the grades in Tom's group is 20×70 = 1400
- The sum of grades in Alice's group is 10×90=900
- The sum of gradees in the combined group is =1400+900=2300
- Then the mean grade of the combined group is
![\frac{2300}{30}=76.67](https://tex.z-dn.net/?f=%5Cfrac%7B2300%7D%7B30%7D%3D76.67)
where
- 2300 is the sum of the all grades in the combined group
- 30 is the total number of people in the group
I assume it is 100 meters, not 100100 meters.
Length (L)=width(w)+4
Perimeter: 2L+2W>100
Plug L=W+4 into the equation 2L+2W>100:
2(W+4)+2W>100
2W+8+2W>100
4W+8>100
4W>92
W>23
the width needs to be at least 23 meters
Answer:
Thanksgiving
Step-by-step explanation:
Answer:
38.5
Step-by-step explanation:
1.)use BEDMAS rule so multiply first
10 × 2.5 + 13.5
=25 + 13.5
2.) then add
= 25 + 13.5
= 38.5