First, determine the value of x. Then find the measure of ∠BCA. Will brainlist first correct answer. X=_

x = 16°    ||   ∠BCA = 57°

explanation:

All the angles lie on a straight line.

A triangles total interior angle is 180°

So we need to find the inner angle of each side and they are:

So with this:

180 - ( 5x + 12 ) + 180 - ( 10x - 37 ) + 180 - ( 9x + 1 ) = 180

180 - 5x - 12 + 180 -10x +37 + 180 -9x-9 = 180

564 - 24x = 180

-24x = 180 - 564

-24x = -384

x = 16°

Then ∠BCA = 180 - ( 10x - 37 )

                   =  180 - ( 10 * 16 - 37)

                    = 57°

1. is 4 and 2. is 3

step-by-step explanation:

so if you look at the first one you see that 1 is to 4 and 2 is to 8 and so on, so you can see for every 1 there is a times 4 so if it were 3 then it would be 3*4 and it is 12

for number 2 it is 3 because 1 is to 3 and 2 is to 6 so for every 1 there is 3 so if it were 3 then there would be 3*3 = 9

i think this could be a possible answer (1 / 84) -1

good luck! : d