Let's begin by listing out the information given to us:
There are four students: n = 4
Number of students to be selected: r = 2
To calculate the combination of 2 students to be chosen, we use:

Therefore, there 12 possible combinations from these
Step-by-step explanation:
< i'll use this too represent angle
this is only presuming that this is a parallelogram and i also don't know what those numbers mean
< ACB = < CAD (alt <s of DA II CB) A
< ACD = < CAB (alt <s of DC II AB) A
AB is common S
therefore, ∆ADC is congruent to ∆CBA
if ∆ADC is congruent to ∆CBA
then < ADC = < CBA
Answer:
New Amount = $9.8
Step-by-step explanation:
Original amount = $ 7
Percentage increase = 40%
Increase in amount =
= 
New amount =
= 
New Amount = $9.8
Hey there!☺



3c/3 = 15/3 Divide both sides by 3
15/3 = 5 Simplify 15/3
c = 5
Hope this helps!
Line CE
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