The solution is in the picture
Type "y=-3x-12x+3" on https://www.cymath.com/answer.php?q=2%3C%3Dx%3C3 CyMath helps so much and can graph, factor, mutiply and more!
All angles add to 180 (interior angles)
22+53+?=180
75+?=180
minus 75 both sides
?=105
third angle is 105 degrees
The two expressions are both rational numbers- they are ending, whole and have no decimals.
You have to double 1 and 50 to get 2 and 100
1:50 = 2:100
1x2=2
50x2=100
So the statement, <em>if she studied for 2 hours, she would have gotten 100%</em>, makes sense
Hope this helps!