For this case we define the following variable:
- <em>x: number of stamps </em>
We now write the equation that models the problem:
From here, we clear the value of x.
We have then:
Answer:
The number of stamps he has is:
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We have been given that a line passes through the point (10, 3) and is parallel to the line
. We are asked to find the y-intercept of the line.
First of all we will rewrite our given equation in slope-intercept form as:
We know that slope of parallel lines is equal, so slope of parallel line to our given line would be .
Now we will use slope-intercept form of equation to find y-intercept.
, where,
m = Slope,
b = The y-intercept.
Let us substitute and coordinates of point
in above equation as:
Therefore, the y-intercept is 7 and our required equation would be .
Answer:
<em>f(-5)=149603</em>
Step-by-step explanation:
<u>Synthetic Substitution</u>
It's a method to find the value of a polynomial for a given value of x. The polynomial we want to evaluate is
at x=-5
We can, of course, just replace x for -5 and compute the powers, products and sums and subtractions, but we can use the synthetic substitution to avoid the powers, just by multiplying and adding or subtracting. The method requires us to use only the coefficients of the ordered and complete polynomial as shown:
-1 4 -4 -6 -3 -6 -1 -2
Now we set up an arrangement where we can place some operations
-1 4 -4 -6 -3 -6 -1 -2
-5
The second row and a new third row will be filled by computing values as explained below.
The first value of the third row is the very same first coefficient (-1)
-1 4 -4 -6 -3 -6 -1 -2
-5
-1
The second value of the second row is the -5 times the first value of the third row: (-5)(-1)=5
Next value of the third row is the sum of the values above of it: 4+5=9
-1 4 -4 -6 -3 -6 -1 -2
-5 5
-1 9
Now we proceed the same with next values to get the full arrangement or synthetic substitution
-1 4 -4 -6 -3 -6 -1 -2
-5 5 -45 245 -1195 5990 -29920 149605
-1 9 -49 239 -1198 5984 -29921 149603
The very last value of the third row is the required substitution
f(-5)=149603
The formatted table can be seen in the image below
