First of all, we know that 
because of its vertical angle. 
is also equal to 
because it's an interior angle.
Consider using the Law of Cosines, because the lengths of three sides are given and the largest angle is the one to be approximated. This angle will be opposite the longest side, that is, opposite the 420-foot side.
420^2 = 250^2 + 300^2 - 2(250)(300)cos A.
Then: 176400 = 62500 + 810000 - 150000cos A.
Solving for cos A, we get:
150000cos A = 176400-62500-810000, or -696100
Then:
-696100
cos A = ------------------- = - 4.64. This is not possible, as the range of the cosine
150000 function is [-1,1].
So,
1400 people in total. Though, subtract 200 for the amount of extra adults. This makes 1200. Divide that by two. You get 600
You need to add 200 to the 600 to get the amount of adults. The amount of adults on board is 800.
The amount of children on board is 600.
600 plus 800 equals 1400, it makes sense. :P
I hope you can read cursive and I hope this helps! (:
1-2 is right
3 you have to draw a shape and then put 3 lines then shade in one
number 4 you have to draw a shape again but put 8 lines through then shade 1
5 your answer is 1/8
6 your answer is 1/4
7 you have to draw a shape again draw 3 line in the shape then shade 1 and your fraction is 1/3
