Question

Need help with10-12please

Answer 1

Because someone else already answer 11 and 12, I will answer 10 :)

Supplementary means the 2 angles add up to 180 degrees. We also know that we want the angles to have a 5:4 ratio. We can set up the following:

5x+4x=180 (X represents the rate the angles increase)

9x = 180

X = 20

Now we can plug in to find the larger angle.

5(20) = Larger angle

100 degrees = Larger Angle


You can double check by plugging in the smaller angle as well and seeing if it adds to 180.

4(20) = Smaller Angle

80 = Smaller Angle.

Both Angles:
100+80= 180

So it checks out :)

I hope this helps you understand!

Answer 2

Number 11 is 2
number 12 is 150