Option 2. 
shows the correct way to use the quadratic formula to solve the given equation.
Step-by-step explanation:
Step 1:
For an equation of the form 
the solution is 
.
Here a is the coefficient of 
, b is the coefficient of x and c is the constant term.
can also be written as 
Comparing 
with , we get that a is 1, b is -4 and c is -21.
To get the solution, we substitute the values of a, b, and c in .
Step 2:
Substituting the values, we get
This is option 2.
You will need to drain 1016.308 gallons an hour
To multiply B and A, the number of columns of B must matc the number of rows of A.
<h3>
When we can multiply two matrices?</h3>
When we multiply two matrices, A and B, we multiply the rows of matrix A by the columns of matrix B.
Now, the number of elements in a row of a matrix, is equal to the number of columns (and the number of elements in a column is equal to the number of rows).
To multiply BxA:
Then, a row on matrix B must have the same number of elements than a column in row A.
Then, to multiply BxA, the number of columns of B must match the number of rows of A, meaning that the correct option is the last one.
If you want to learn more about matrices, you can read:
brainly.com/question/11989522
This is a problem in which the
percentage and the actual amount are both given. Only thing to do is convert
the percentage to amount.
3% of $600.85 = (3/100) * 600.85
= 1802.55/100
= 18.0255
= 18.03 dollars
So 3% of the amount $600.85 is $18.03.
I hope this was the answer you
were looking for and I have helped you in this matter. If you have understood
the procedure of doing this problem, then in future you can attempt such
problems by your own with absolute ease.
