You know vertical Angles SRU and TRV are congruent.
You are given that Sides UR and VR are congruent.
You are given that Angles SUT and SVT are congruent.
An appropriate choice is the ASA postulate, since you have congruent angles with congruent sides in between.
Y=x-4
x=y+4
y=-3(y+4)
y=-3y-12
4y=-12
y=-3
x=1
I'm sorry but it's bugging me that you aid 'one cases', you can't have the plural of something that is strictly singular.
Now: for your answer.
72*35=2520
94*23=2162
2520+2162=4682
The total wight is 4682 pounds.
Hope this helps
It's easy to show that
is strictly increasing on
. This means

and

Then the integral is bounded by

