Answer:
Malcolm’s debt-to-income ratio is 0.8125
Step-by-step explanation:
we know that
To find out Malcolm’s debt-to-income ratio, divide monthly expenses by the monthly salary
Let
x ------> Malcolm’s monthly expenses
y -----> Malcolm’s monthly salary
In this problem we have
The ratio is equal to
Problem 13
If we want to multiply (x^3-3x^2+2x) with (x^3-2x^2+x), then we can set up a diagram shown below. The terms are along the outside. The stuff inside is the result of multiplying each pair of outer terms.
This is known as the box method to keep track of all the terms multiplied.
Once the table is filled out, we add up each term inside the boxes. Combine like terms if possible. Notice that I color-coded the like terms (eg: the x^3 terms are in green boxes).
The final answer is x^6 - 5x^5 + 9x^4 - 7x^3 + 2x^2
