And means Addition in Math
When x=1 y=13 when x=3 y=19 and when x=5 y=25 you just plug the numbers in for x and solve
I would think it is round each amount to the nearest thousand dollars.
All you would do is multiply .9 by 20
.9*20=18
90% of 20 is 18
If the whole angle (ABC) is equal to 133, we can add angles ABD and DBC to find x.
10x+13=133
Subtract 13 from both sides to get
10x=120
Divide both sides by 10 to get that x=12
We can now plug the value of x into ABD to find its measure.
7(12)+4
Simplifies to 84+4, which is 88
So angle ABD is equal to 88 degrees.
:)
