Answer:
The combined average is 94%
Step-by-step explanation:
for first period, number of students =40
average =96%
for second period, no of students =20
average =90%
but 
let 
=sum of students for the first period
=sum of students for the second period
for first period;
for second period,
therefore the combined average = 
that is 
so combined average is 94%
Answer: 40/9
tan A = BC/AC = 40/9
Step-by-step explanation:
Her home was 2 km 691 m from the store. (5 km = 5000m --> 5000-2309)
28=-2-5x
30=-5x
30/-5=-5x/-5
-6=x
1. First, you must find the constant of variation (k). The problem indicates that t<span>he base of each triangle varies inversely with the height. So, this can be represented as below:
</span>
B=k/H
B is the base of the triangle (B=10).
H is the height of the triangle (H=6).
k is the constant of variation.
2. When you clear "k", you obtain:
B=k/H
k=BxH
k=10x6
k=60
3. Now, you have:
B=60/H
4. You can give any value to "H" and you will obtain the base of the second triangle.
5. If H=12, then:
B=60/H
B=60/12
B=5
6. Therefore, <span>the possible base and height of a second triangle is:
</span>
B=5
H=12
