a. Y = 16.8x + 40 4. Write an equation in point-slope form for each line described. a. slope -1 passing through (-2, 3) b. parallel to y = 5 + 2(x – 4) passing through (0, -8) c. passing through (1999, 13.2) and (2009, 8.6) d. horizontal line through (2,7)I ghink​

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.

hence, the required result is

step-by-step explanation:

suppose we have two matrices a and b

we will assume the two matrices

we have to compute b-a which means subtracting corresponding elements of a from b.

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