Answer: A . Not all 2 × 2 matrices have an inverse matrix. If the determinant of the matrix is zero, then it will not have an inverse; the matrix is then said to be singular. Only non-singular matrices have inverses.
Step-by-step explanation:
Answer: find the answer in the explanation.
Step-by-step explanation:
You are given that the sides of a rectangle are a number and 4 less than that same numbers.
Let the length side = L
And width side = L - 4
The dimensions of the rectangle will be
Area = length × width
L × ( L - 4 )
Open the bracket
L^2 - 4L
The verbal expression here,
Perimeter = L + L + W + W
Substitute all the parameters into the formula
56 = L + L + L-4 + L-4
56 = 2L + 2L - 8
56 = 4L - 8
Nothing futher can be done to it
Answer:
60% decrease
Step-by-step explanation:
To find the percentage increase/ decrease construct a fraction with numerator showing increase/ decrease and denominator with original number then multiply the fraction by 100%
here the decrease = 45 - 18 = 27
percent decrease = 
× 100%
= 
× 100% = 60%
