Answer:
pretty sure it's 9.
Step-by-step explanation:
square root of 81 is 9. 3 is its radius.
Step-by-step explanation:
We need to write the given expression in the form of and the expression is .
The property is :
We have, x = 7, n = m = 3
So,
Therefore, the value of n is 9.
8.5% of 20,000 is 1,700
20,000+1,700=21,700
9514 1404 393
Answer:
13.3 m
Step-by-step explanation:
Let d represent the length of the diagonal. Then the length of the rectangle is (d-2) and the width is (d-6). The area is the product of length and width, so is ...
A = LW
83 = (d -2)(d -6) = d² -8d +12
71 = d² -8d . . . . . . . . subtract 12 to get the constant out of the way
d² -8d +16 = 87 . . . . add (-8/2)² = 16 to both sides to complete the square
(d -4)² = 87 . . . . . . . write as a square
d -4 = √87 . . . . . . . positive square root
d = 4 +√87 ≈ 13.3 . . . . add 4
The diagonal is about 13.3 meters long.
_____
<em>Additional comment</em>
If you check to see if the side lengths actually correspond to those of a rectangle, you find that they do not. <em>The geometry described here is impossible</em>. The rectangle with the proposed relations between sides and diagonal would have a diagonal of about 12.899 m and an area of about 75.19 m².
Answer:
2sqrt =10
Step-by-step explanation:
40 - x^2 = 0...subtract 40
-x^2 = -40....multiply both sides by -1
x^2 = 40
x = (+ - ) sqrt 40
x = (+ - ) sqrt 4 * 10
x = (+ - ) 2 sqrt 10
x = 2 sqrt 10, and x = -2 sqrt 10