Pam is measuring the distance of her journey to school. The distance from her house to the bus stop is 320m, then the bus journe
y is 2.85km. This is how she works out the distance. Fill in the gaps...
1 answer:
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The product of the matrices is an identity matrix. Therefore, X and A are inverse of each other.
The matrices are given as:
To check the matrices are inverse, we calculate their products.
Multiply the rows of A by the column of X.
This gives
The product of A and X is an identity matrix.
This means that; both matrix are inverse of each other
Read more about matrix at:
A system of equations with infinitely many solutions is a system where the two equations are identical. The lines coincide. Anything that is equal to 
will work. You could try multiply the entire equation by some number, or moving terms around, or adding terms to both sides, or any combination of operations that you apply to the entire equation.
You could multiply the whole thing by 4.5 to get
. If you want, you could mix things up and write it in slope-intercept form: 
. The point is, anything that is equivalent to the original equation will give infinitely many solutions x and y. You can test this by plugging in values x and y and seeing the answers!
The attached graph shows that four different equations are really the same.
You could multiply the whole thing by 4.5 to get
The attached graph shows that four different equations are really the same.