Answer:
x₁ = 6 and x₂ = 8
Step-by-step explanation:
See the picture below
Answer:
Length: 21 cm and Width: 6cm
Step-by-step explanation:
Let
be the width and
length of the rectangle. We know:
-------- eq. 1
(Perimeter of the rectangle) ------- eq. 2
Substitute equation 1 in equation 2:

Using the value of y, we find x.

I only got 22-25 done cause its been a long time since ive done these so i don't remember how to do the first two ):
400 because I said so and u are asking me is here is the answer
-1584.
multiply 42 times 42 the subtract that from 180