Aabc is an obtuse triangle. given that cb = 20, the measure of za = 30°, and the measure of zb = 45°, which of the
expressions listed would be used to find how long ca is? (note: for a abc, where a, b, and care the lengths of the
sides opposite za, zb, and zc, respectively, sir
wo sinza sinzb sinzc
abc
a = 20
45sin 20°
sin 30°
20 sin 30°
sin 45°
20 sin 45°
sin 30°
sin 45°
20 sin 30°

be more specific

step-by-step explanation:

answer: $201

step-by-step explanation: to get the answer, you first get 3 nieces that he sold and multiply it by 67 and get $201, so he earned $201 selling his nieces.

let's cover over the formula of the vertex:

y = a(x – h)^2 + k

in this formula, (h,k) are the vertex, always remember that the positive or negative value of the vertex is based on the sign it has.

for example, if the vertex is -3,-6 then both the x and y value would have the positive sign attached to it and if it were a positive x and y value, then a negative sign would be attached to it.

with that being said, for our problem the x value is a positive one so we are looking for a number with a negative sign next to it, in this case the first and second choice.

however, for the first answer choice it isn't quite part of the formula so we know that the answer choice correctly displays the x value.

to confirm, we can see if the -1 fits correctly with the second answer choice, and as mentioned above a negative number will have a positive sign attached to it. so, for our problem we can see that -1 has been changed to +1, so we can confirm that the second answer choice is correct.

hence, our final answer is y=(x - 1)^2 + 1