Answer:
Step-by-step explanation:
Angles<em> </em><em>Y</em> and <em>X</em> form a <em>linear pair</em>, therefore you use the Linear Pair Theorem to solve for <em>x</em>:
![\displaystyle 180° = [2s - 4]° + [s + 91]° → 180° = [87 + 3s]° → 93 = 3s; 31 = s](https://tex.z-dn.net/?f=%5Cdisplaystyle%20180%C2%B0%20%3D%20%5B2s%20-%204%5D%C2%B0%20%2B%20%5Bs%20%2B%2091%5D%C2%B0%20%E2%86%92%20180%C2%B0%20%3D%20%5B87%20%2B%203s%5D%C2%B0%20%E2%86%92%2093%20%3D%203s%3B%2031%20%3D%20s)
I am joyous to assist you at any time.
The answer is 1/4
Explanation
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The question focuses on "if the student is known to be a boy..." we would obviously know that we would focous on only the total of the boys.
We have the formula for the probability of an event of happening which we would call event A (a boy being left-handed). P(A)= number of favorable outcomes/ total number of possible outcomes. The left-handers would go in the favorable outcomes since we want the probability of a boy being left handed and we would place the total boys in the total number of possible outcomes since all of them are going to be the one to be randomly picked. 50 left-handed/ 200 total boys. We have our fraction that is 50/200 as the probability but we can simplify it! We simplify 50/200 to get 1/4!!! 1/4 is the probability of a boy being picked that is left-handed!
Hope this helps!
5.25 -0.75 a is the expression, but to answer the question on the paper you would plug in the number of belts being made into where the variable a is. Hope this helps!
The first choice is correct
