PLS HELP ASAP ILL mark u as brainlist!!

Its C.

Step-by-step explanation:

31+90+x=180

x=59

there is only one option with the answer 59 for the 4th angle therefore no need to find the rest

C

Each triangle sector = 180º

m<1 must be 90º because combined with the angle to the left it is 180º (supplementary angles)

m<2 is 31º because it is basically the same angle as <R

m<3 is the same as m<4

to figure out angles 3 & 4, you need to:

31 + 90 + x = 180

121º + x = 180

180 - 121 = 59º

m<3 & m<4 is 59º

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