Answer:
-14
Step-by-step explanation:
forget the parenthesis. just think of it as -6-8, for instance on a number line, if you start on -6 and you SUBTRACT 8, then youre going left, so youd be going further into the negative numbers. you can also think of it as 6+8, which would be 14, then slapping the negative sign back on it.
Answer:
1.896 is correct
Step-by-step explanation:
Answer:
i) The augmented matrix for this system is
ii) The reduced row echelon form
iii) The set of solutions are
= -692/65
= 423/130
= -493/65
Step-by-step explanation:
i) An augmented matrix for a system of equations is a matrix of numbers in which each row represents the constants from one equation (both the coefficients and the constant on the other side of the equal sign) and each column represents all the coefficients for a single variable.
We have the following system of equations:
Here is the augmented matrix for this system.
ii) To find the reduced row echelon form of
you must:
- Divide row 1 by 4
- Subtract row 1 multiplied by 2 from row 2
- Add row 1 to row 3
- Divide row 2 by 13
- Add row 2 multiplied by 1/2 to row 1
- Subtract row 2 multiplied by 11/2 from row 3
- Multiply row 3 by −2/5
- Add row 3 multiplied by 3/2 to row 1
- Subtract row 3 multiplied by 1/2 from row 2
The answer is
iii) The set of solutions are
= -692/65
= 423/130
= -493/65
Answer:
"$/km"
Step-by-step explanation:
He wants to model "maintenance cost" with respect to "distance"
Normally,
maintenance cost would be in currency --- dollars, pounds etc.
distance would be in kilometers, miles, meters etc.
We need to find the ratio that has the COST on top and DISTANCE on bottom
Looking at the choices,
We can eliminate 1st and 3rd immediately as it doesn't have COST on top.
That leaves us with
$/km
and
km/$
$ is in fact currency and unit for cost and km is in fact unit for distance. We need the ratio that has $ on top and km on bottom, that's the 2nd option.
So, $/km is the appropriate unit.