Answer:
x=20
3x= 3(20)=60
4x= 4(20)=80
Step-by-step explanation:
The angles CD is 90 degrees because the small square indicates
it. Angles AD are a straight angle, therefore all the other angles within A to D, must equal 180 degree. (straight line/angle=180 degrees).
so AB + 70+ 90= 180 degrees
AB= 180 -70-90
AB=20
x=20
3x= 3(20)=60
4x= 4(20)=80
1 is the 3rd option down
2 is the second option down
1. bobby would be 21 and chris 18.
<span>3n + 4 = 7
</span><span>3n = 7 - 4
3n = 3
n = 1</span>
