There are 10 seniors in the class, from which 4 should be chosen by the teacher. The order of the chosen students does not matter. This means that we speak of combinations. THe equation for calculating the number of possible combinations is:
C=N!/R!(N-R), where N is the total number of objects and R is the number of objects we select from the N
In our case, N=10, R=4.
C= 10!/4!*6!=10*9*8*7*6!/6!*4*3*2*1=<span>10*9*8*7/24=5040/24=210
There are 210 different ways for the teacher to choose 4 seniors in no particular order.</span>
The length of the diagonal is the hypotenuse of the fence
The length of the wood is
yards
<h3>How to determine the length of the wood?</h3>
The dimensions of the fence are:
7 ft by 7 ft
The length (L) of the diagonal is calculated using:

This gives

Express as products

Express as radical

Hence, the length of the wood is
yards
Read more about diagonals at:
brainly.com/question/10187910
X-intercept is (-1/3 , 0)
Answer:
∠AEC = 105°
Step-by-step explanation:
If two chords intersect each other in a circle then the vertical angles formed are equal.
In this question two chords AB and CD intersect each other at point E then ∠DEB and ∠AEC are vertical angles which are equal.
Therefore ∠DEB = ∠AEC
Here m∠DEB = 105°
Then m∠AEC = 105° ( by Theorem)
Therefore the correct answer is ∠AEC = 105°
6x/-2 X=-3 okurtrrrrrrrrrrrrrrrr