The image is really unclear but I will assume that the number of teams given = 66
and the formula is
![n = \frac{ {t }^{2} - t }{2}](https://tex.z-dn.net/?f=n%20%3D%20%5Cfrac%7B%20%7Bt%20%7D%5E%7B2%7D%20-%20t%20%7D%7B2%7D%20)
plug in the number of teams
![66 = \frac{ {t}^{2} - t }{2}](https://tex.z-dn.net/?f=66%20%3D%20%5Cfrac%7B%20%7Bt%7D%5E%7B2%7D%20-%20t%20%7D%7B2%7D%20)
multiply both sides by two
![132 = {t}^{2} - t](https://tex.z-dn.net/?f=132%20%3D%20%7Bt%7D%5E%7B2%7D%20-%20t)
subtract 132 from both sides and factor
t = 12
7/3, 6x7/3 is 14, good luck!
Answer:
13.60 See the note below.
Step-by-step explanation:
Remark
This is just the reverse of the question you just did. This time you are trying to solve for c
Givens
Solution
c^2 = a^2 + b^2 Substitute the givens.
c^2 = 8^2 + 11^2 Expand
c^2 = 64 + 121 Combine the right side by adding
c^2 = 185 Take the square root of both sides.
sqrt(c^2) = sqrt(185) Complete the operation
c = 13.601 Round to the nearest 1/100 th
c = 13.60 Note: the zero must be there or the answer does not show the nearest 1/100 th
Answer: 322
Step-by-step explanation:
23 students × 14 homework
=322 problems
The teacher will have to grade 322 problems
4(3+x)
This is because 4*3=12 and 4*x is 4x so you get 12+4x which is the original equation