Answer: The Answer is actually 70 butterfly notebooks!!
Step-by-step explanation:
You have to use the distributive property for the numerator on both equations.
The correct option is: 53.9°
<em><u>Explanation</u></em>
According to the below diagram,
is acute triangle, in which
and 
If we <u>apply cosine rule</u> here, then we will get.....

Now, plugging the given values, we will get....

So, the measure of
is 53.9°
Answer:
AB = DF (Proved below)
Step-by-step explanation:
Here,
CE = CD + DE [since D is a point over CE]
= DE + EF [ Since, CD = EF (given)]
= DF [ Since, E is a point over DF] ---------------(1)
Again,
AB = CE (given) ------------------------(2)
So from (1) and (2),
AB = CE = DF
⇒ AB = DF (Proved)
Answer:
x = 13/5, 11/15
Step-by-step explanation:
(11x - 15) (5x - 13)
11x = 15
x = 11/15
5x = 13
x = 13/5
Tell me if I am wrong.
Can I get brainliest