I Think it’s 120° I hope I helped you.
Answer:
D
Step-by-step explanation:
If you find the slope, it is -4. Wheb x is 0, y is 18, so the y intercept is 18
Therefore the equation is y=-4x+18, which is not linear.
Answer:
<h2>Obtuse</h2>
Step-by-step explanation:

I hope it helps :)
Answer:
Part a) The length of the mat is
Part b) The area of the mat is 
Step-by-step explanation:
step 1
Find the length
Let
L-----> the length of the rectangle
W---> the width of the rectangle
we know that
The perimeter of rectangle is


so

----> equation A
-----> equation B
substitute equation B in equation A

solve for W


Find the value of L
step 2
Find the area
The area of rectangle is equal to

substitute the values
