Very simple the answer is
x=-1.53
Given the triangles ABC and DEC
For the triangle ABC:
m∠A = 36, m∠B = 21
So, the m∠C = 180 - (m∠A + m∠B ) = 180 - (36 + 21) = 123
So, comparing the measurements of the angles of both triangles:
![\begin{gathered} m\angle A=m\angle D=36\degree \\ m\angle\text{ACB}=m\angle\text{DCE}=123\degree \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20m%5Cangle%20A%3Dm%5Cangle%20D%3D36%5Cdegree%20%5C%5C%20m%5Cangle%5Ctext%7BACB%7D%3Dm%5Cangle%5Ctext%7BDCE%7D%3D123%5Cdegree%20%5Cend%7Bgathered%7D)
So, the triangles are similar using the AA postulate.
So,
Angles 24 degrees and 26 degrees are acute angles.
Answer:
285 (or 30% of 950)
Step-by-step explanation:
It might help if you think of it in terms of 10% and 1%. 10% is the same as dividing by 10. so 10% of 45 is 45. 1% is dividing by 100, so 10% of 55 is .55
Now, it also asks what is the amount that don't fir into the 30% and 40% of the books we know. Well, that means we want to know the remaining 30%. It's 30% history, 40% science and 30% other to make 100%.
So what is 30% of 950? You could just multiply 950 by 30% or .3, or you could do the method I mentioned. What is 10%? 95. Then you multiply that by 3 to get 30%. so 30% of 950 is 285