Answer:324x^3-828x^2-63x+-9\20
Step-by-step explanation:
The order of a matrix is m×n where m is the number of rows and n is the number of columns.
can you count and find what are m and n here?
Answer:
--- The third quartile
-- Variance
Step-by-step explanation:
Given
-- First quartile
--- Median
--- Mean
--- Coefficient of skewness
Solving (9): The third quartile 
This is calculated from
So, we have:
Cross Multiply
Open bracket
Collect like terms
Divide both sides -1.38
--- approximated
Solving (b): The variance
First, calculate the standard deviation from:
So:
Make SD the subject
So, the variance is:
The square footage would be 24 feet.
Step-by-step Answer:
Step 1:
Extract factor(s) common to all terms.
In this case, the HCF is 3, so the expression is written
-12x^2+45x+12 = -3(4x^2-15x-4)
The negative sign was also exrracted to give a positive leading coefficient, which is easier to work with.
Step 2, group the coefficient in such a way that there is a common factor.
Leaving the factor -4 for the moment, and concentrate on the coefficients in parentheses, write the original expression as
4x^2 - 15x -4
= 4x^2 -16x
+ x -4
= 4x*(x-4) + 1*(x-4)
extract (x-4) as a common factor
= (x-4)(4x+1)
Step 3:
Combine all the factors to get
-3(x-4)(4x+1)
=3(4-x)(4x+1)
as the complete factoring of the given expression.
