Answer: The answer is 8.
Step-by-step explanation: The first step is to convert the expression into figures. We shall call the unknown number Y. So if we are told “the square of a number,” that means Y squared, or better still, Y^2. Further we are told “the difference between the square of a number and 40” and that can be written as;
Y^2 - 40.
Next we are told that this expression is equal to 3 times that number (that is 3Y). That can now be written out as follows,
Y^2 - 40 = 3Y
If we move all expressions to one side of the equation, what we would have is,
Y^2 - 3Y -40 = 0
(Remember that when a positive value crosses to the other side of an equation it becomes negative and vice versa)
We now have a quadratic equation
Y^2 -3Y - 40 = 0
By factorizing we now have
(Y -8) (Y + 5) = 0
Therefore Y - 8 = 0 or
Y + 5 = 0
Hence, Y = 8 or Y = -5
Since we are asked to calculate the positive solution, Y = 8
Firstly, we will draw figure
now, we will draw a altitude from B to DC that divides trapezium into rectangle and right triangle
because of opposite sides of rectangle ABMD are congruent
so,
DM=AB=9
CM=CD-DM
CM=18-9
CM=9
now, we can find BM by using Pythagoras theorem

now, we can plug values
we get


now, we can find area of trapezium

now, we can plug values
and we get


so, area of of the trapezoid is
..........Answer
Well 600-280=320 but if you're going for the neerest hundred that will be 300
To find the how many times greater is the storage capacity of a 1-gigabyte flash drive than a 1-megabyte flash drive we have to apply exponent operation.
The storage capacity of a 1-gigabyte is 1000 greater than 1-megabyte flash drive.
Given:
The given exponent for gigabyte is,

The given exponent of megabyte is,

<h3>What is exponent rule?</h3>
- The power rule of exponent rule is defined as if raise the a number with exponent to power then we will mulitply exponent to the power times.
- to change the negative exponent into a positive we have to invert the base.
Calculate the storage capacity.

Thus, the storage capacity of a 1-gigabyte is 1000 greater than 1-megabyte flash drive.
Learn more about exponent rule here:
brainly.com/question/2254060
Answer:
12
Step-by-step explanation:
9+3=12
hope it helps
btw I need one more brainliest to level up