Answer:
Step-by-step explanation:
Given
Required
Show that:
Divide through by a
The general form of a quadratic equation is:
By comparison, we have:
Sum is calculated as:
So, we have:
Divide both sides by -1
Similarly;
Product is calculated as:
So, we have:
C. 35 because if it is 35 roses, it will have to be 7 tulips. Divide 35 by 7 and get 5, and divide 7 and 7 to get 1.
Answer:
1.697
Step-by-step explanation:
A is the correct answer. 23/40=0.575 and 4.6/8= 0.575 as well.
Answer:
Step-by-step explanation:
To find the matrix A, took all the numeric coefficient of the variables, the first column is for x, the second column for y, the third column for z and the last column for w:
And the vector B is formed with the solution of each equation of the system:
To apply the Cramer's rule, take the matrix A and replace the column assigned to the variable that you need to solve with the vector b, in this case, that would be the second column. This new matrix is going to be called .
The value of y using Cramer's rule is:
Find the value of the determinant of each matrix, and divide: