Answer:
2/3
Step-by-step explanation:
You can divide a 4 from both 8 and 12, giving you 2 over 3 as your fraction.
The answer is d because
x²-36 = 0
x²-6² = 0
(x+6)(x-6) = 0
x = 6, -6
Answer:
The expression for the perimeter of the rectangle is: 
Step-by-step explanation:
Perimeter of a rectangle:
A rectangle has length l and width w. It's perimeter is given by:
In this question:
So
The expression for the perimeter of the rectangle is:
Your procedure is perfect, you're fine, however, bear in mind that, in a calculator when plugging in values for some functions, specially trigonometric ones, if you tell it cos(40), and the calculator is in Radian mode, it thinks you meant cosine of 40 radian units, if you give it cos(40) and it's in Degree mode, it thinks you meant 40°, and 40 radians is hugely different than 40°.
so, make sure your calculator is in Degree mode, as you'd have guessed, it isn't.
