The first answer to the first question is 27
the second answer to the second question is 2,875 million km
the third answer to the third question is <span>31680000</span>
320 = 2x² - 12x as when there are an unknown number of rows there are 320 seats.
0 = 2x² - 12x - 320
0 = x² - 6x - 160
0 = (x - 16)(x + 10)
for this to = 0 one bracket must equal 0
therefore x = 16 or x = -10
not a negative number of rows.
Therefore must be 16.
The answer should be 126 or A.
(-1,-2) would result in a relation that is no longer a function.
In the table, there's already x = -1 and y = -4. Function only gives a single y-value with x-value. If a single x-value gives two y-values then it'd not be Function.
If we add (-1,-2) in the table. The domain will be repetitive. Basically, we already have (-1,-4) and if we add (-1,-2) in the table, a single x-value will give TWO y-values which is not a function.
Hello.
The answer is: 24
length=3*width, this can be written as 3w
area=27 sq cm
Formula for the area of a rectangle=27 (area)= 3w (length) * w (width)
27=3w^2
then divide both sides by 3: 9=w^2
take the square root of both sides to get: w=3
Now that we know what the width is, we can substitute that and find the length: 3w= 3*3=24
have a nice day
