Answer:
Side x is adjacent to 30° angle.
<u>Correct method is:</u>
- cos 30° = x/15 ⇒ x = 15*cos 30° ⇒ x = 12.99
Diego is correct and Steven is wrong.
- when finding <u>sine</u> consider the <u>opposite side to the angle</u>, not hypotenuse
- when finding <u>cosine</u> consider <u>adjacent side to the angle,</u> not hypotenuse
The requirement is that every element in the domain must be connected to one - and one only - element in the codomain.
A classic visualization consists of two sets, filled with dots. Each dot in the domain must be the start of an arrow, pointing to a dot in the codomain.
So, the two things can't can't happen is that you don't have any arrow starting from a point in the domain, i.e. the function is not defined for that element, or that multiple arrows start from the same points.
But as long as an arrow start from each element in the domain, you have a function. It may happen that two different arrow point to the same element in the codomain - that's ok, the relation is still a function, but it's not injective; or it can happen that some points in the codomain aren't pointed by any arrow - you still have a function, except it's not surjective.
The 0 is a represents a rational number.
B.) (15 + 2)x because they both are getting multiplied by the value of x making it 17x.
<span>The geometric theorem about intersecting lines applies to systems of linear equations because if a system of linear equations has a unique answer, it will be the point of intersection. That is, the point where the two lines intersect, the unique point, is the solution to the system. Thats the answer </span>