Answer:
Step-by-step explanation:
Area if a traiangle =1/2 × base × height
5 1/10 = 1/2 ×3 2/5 ×h
Change mixed fractions to improper fractions
51/10= 1/2 ×17/5 ×h
51/10 = 17/10×h
Divide 51/10 by the coefficient of h
51/10÷17/5 = h
51/10 ×5/17 = h
3/2 = h
h =1 1/2 inchea
The height of the triangle 1 1/2 inches
Consider such events:
A - selected student is freshmen
B - selected student is girl
- selected student is freshman is girl
- choosen girl is freshmen.
Use formula 
.
From the table you can see that girls that are freshmen are 4 from all 30 people, then 
. There are 18 girls, then 
. Substitute into the formula:
.
Answer: 
.
Step-by-step explanation:
[1/2]^-2= 4
[1/3]^-2=9
[1/4]^-2=16
So sum is 4+9+16=29
Hope this helps you.
17.2/43= 0.4
Since the scale is 1:43, you would just divide the actual length by 43.
0.4:17.2 is congruent to 1:43.
43/17.2= 2.5
1/.04= 2.5
I hope this helps!
~kaikers
