Arnold would be 51 years old
Answer: 78.2
Step-by-step explanation:
You can figure out by making proportions so 5/17=23/x and then solve for x
For #16, it can be assume that the two angles are linear, so set them both equal to 90 (9x+x-10=90) and solve for x. Once you have x, plug it into the equations to find the measure of both angles. If both your final answers are added, they should equal 180. If not, go back and try to find where you messed up.
I think so.. If not i am super sorry!!