Answer:
Part 1) 
Part 2) 
Part 3) 
part 4) 
Part 5) 
Step-by-step explanation:
we know that
In a rectangle opposite sides are parallel and congruent
The measure of each interior angle is 90 degrees
The diagonals are congruent and bisect each other
step 1
Find the length of side PR
we know that
----> by opposite sides
we have

therefore

step 2
Find the length of side PQ
we know that
----> by opposite sides
we have

therefore

step 3
Find the length of diagonal PS
we know that
---> the diagonals bisect each other
we have
---> given problem
therefore

step 4
Find the length of diagonal QR
we know that
---> the diagonals are congruent
we have

therefore

step 5
Find the length of RT
we know that
---> the diagonals bisect each other
we have

substitute

Answer:
y = 2x - 6
Step-by-step explanation:
Slope-intercept form is y = mx + b, where m is the slope and b is the y-intercept.
The y-intercept is already given and is -6.
By c intercept, I am assuming you meant x-intercept. With an x-intercept of 3, the point is (3,0). With a y-intercept of -6, the point is (0,-6).
Use the two points to find the slope using the following equation.

Plug the points into their respective positions and solve.

The slope is 2.
Your equation is y = 2x - 6.
Since we know that squares have the same length on all sides, you would find the square root of 170
√170=13.03840481
rounded to the nearest tenth would be 13.1
You can check your work by multiplying 13.1 by 13.1 which equals 170.3
I try to explain the problem and give the answer, I hope this helps!
The number goes on and on so put a line on top of that num. To show it teacher that,that number is infinite. So yeah ur right (°∀°)b