Step-by-step explanation:
100 multiple it by the percentage
Answer:
![The\ weight\ of\ the\ 50\ erasers\ be\ \frac{4000}{n}\ grams.](https://tex.z-dn.net/?f=The%5C%20weight%5C%20of%5C%20the%5C%2050%5C%20erasers%5C%20be%5C%20%5Cfrac%7B4000%7D%7Bn%7D%5C%20grams.)
Step-by-step explanation:
As given
if n erasers have a weight of 80 grams .
I.e
n erasera = 80 grams.
1 erasers weight .
![1\ erasers\ weight = \frac{80}{n}](https://tex.z-dn.net/?f=1%5C%20erasers%5C%20weight%20%3D%20%5Cfrac%7B80%7D%7Bn%7D)
Now find out the weight of the 50 erasers.
![Weight\ of\ 50\ erasers = \frac{50\times 80}{n}\ grams](https://tex.z-dn.net/?f=Weight%5C%20of%5C%2050%5C%20erasers%20%3D%20%5Cfrac%7B50%5Ctimes%2080%7D%7Bn%7D%5C%20grams)
Simplify the above
![Weight\ of\ 50\ erasers = \frac{4000}{n}\ grams](https://tex.z-dn.net/?f=Weight%5C%20of%5C%2050%5C%20erasers%20%3D%20%5Cfrac%7B4000%7D%7Bn%7D%5C%20grams)
![Therefore\ the\ weight\ of\ the\ 50\ erasers\ be\ \frac{4000}{n}\ grams.](https://tex.z-dn.net/?f=Therefore%5C%20the%5C%20weight%5C%20of%5C%20the%5C%2050%5C%20erasers%5C%20be%5C%20%5Cfrac%7B4000%7D%7Bn%7D%5C%20grams.)
Do a proportion.
5/32= x/800
Cross multiply and divide
800 x 5= 4,000
4,000 divided by 32= 125
So answer is 125 students
Answer:
11%
Step-by-step explanation:
The full circle graph represents 100% of the given population. All populations are given except for "three or more." Adding all percentages of each population should add up to 100%.
No absences (none): 23%
One absence: 45%
Two absences: 21%
Three more absences: unknown.
Let the variable x represent the unknown population.
23% + 45% + 21% + x = 100%
Combine like terms.
89% + x = 100%
Subtract 89% from both sides.
x = 11%
To put it more simply, subtract all the percentages from 100% to get the percent of the missing population. 100 - 23 - 45 - 21 = 11