Answer:
ABC = 113°
Step-by-step explanation:
If ABD is 70° and DBC is 43°
ABC is 70°+43° = 113°
Solving the given system of equations we get solution set: {(4,0),(0,4)}
Option B is correct.
Step-by-step explanation:
We need to find the solution set of the following equations:
Let:
Finding value of x from eq(1) and putting in equation (2)
Putting values of y=4 and y=0 in equation(1), to find values of x:
Putting y=4
So, one solution is (0,4)
Putting y=0
So, other solution is: (4,0)
Hence Solving the given system of equations we get solution set: {(4,0),(0,4)}
Option B is correct.
Keywords: System of equations
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Answer: 195
Step-by-step explanation:
(0.3x + 66) + (0.1x + 36) = 180. ( 180 because thats the angle of a straight line)
0.3x + 0.1x + 66 + 36 = 180
0.4x + 102 = 180
0.4x = 180 - 102
0.4x = 78
x = 195
A shape with eight angles and sides is called an octagon.