If angle DCA measures 50 degrees, what does angle ACB measure?

A.140
B.90
C.40

#2.If angle ACD measures 60 degrees, what does angle ACB measure?

A.15
B.30
C.150

Part 1:

Angle DCB is a right angle.

So, angle DCA + angle ACB = 90

Angle ACB = 90 - angle DCA = 90-50=40

Answer is option C. 40

Part 2:

Angle DCB is a right angle.

So, angle DCA + angle ACB = 90

Angle ACB = 90 - angle DCA = 90-60=30

Answer is option B. 30

the formula of a slope:

from a table we have

substitute:

the slope of f(x) is -1.

the graph of funcfion g(x) is a horizontal line. the slope of a horizontal line is equal 0. therefore the slope of g(x) is 0.

-1 < 0

4932,9180,7625 are divisible by 9