Answer:8
Step-by-step explanation:
#17
Use property that the diagonals of a parallelogram bisect each other, =>
x+y=18
y+(can't read)=22
Solve for x and y.
#18
z+60=180 [angles on a line are supplementary]
x=z [opposite angles of a parallelogram are congruent]
y=50 [alternate interior angles between parallel lines AD and BC]
#19
3v=30 [ opposite sides of a parallelogram are congruent ]
solve for v.
2u-1=19 [ ditto ]
solve for u.
#20
(a) AB//DC [ adjacent angles are supplementary ]
(b) PS//QR [ ditto ]
#21
1) a parallelogram with one angle 90 means the adjacent angles are 180-90=90. This in turn means all angles are 90, so the figure is a rectangle (adjacent sides may or may not be equal in a parallelogram).
2) a rectangle with adjacent sides equal must be a square.
Answer:Angle m<2=37
Step-by-step explanation: first vertical angles are always congruent so i used a calculator and put in 3x+7=7x-33
this told me x=10
so i plugged in 10 as x 7(10)-33
which equals 37
and to see check i tried m<1
3(10)+7=37
and the other sides of your vertical angles are 53 degrees each
<span>.75(x+3)=.5(3)+x
</span><span> You already have 3 liters, and you are going to add x liters.
50% (.5) of the 3 liters is acid, and 100% (1) of the added x liters is acid. You will end up with (3+x) liters.
If you have been assigned this problem, you should be able to solve this equation...
</span><span> Hope this helps you solve this, and remember how to do others like it. </span>