Answer:
An altitude of 7 meters below sea level
Step-by-step explanation:
Key word: <em>BELOW</em>
Given:

To find:
The values of a and b.
Solution:
We have,

It can be written as

Add and subtract square of half of coefficient of x in the parenthesis.


![[\because (x+y)^2=x^2+2xy+y^2]](https://tex.z-dn.net/?f=%5B%5Cbecause%20%28x%2By%29%5E2%3Dx%5E2%2B2xy%2By%5E2%5D)

On comparing both sides, we get


Therefore, the value of a is 1 and the value of b is -8.
D. y= -2x+9 is a solution that will produce an infinite number of solutions
Step-by-step explanation:
because it has decimal number.
If the sides are in the ratio of 5:3 then the area will increase by a factor of:(5 / 3) ^2
(5 / 3)^2 =
<span>
<span>
<span>
2.777777777
</span>
</span>
</span>
Area of small hexagon = 81
Area of larger hexagon = 81 * 2.777777777
Area of larger hexagon = 225 square meters