Which equation shows a slope of 3 and a y-intercept of (0,7) ?
2 answers:
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Answer:
B. -1
Step-by-step explanation:
x^3-4x^2+2x+10=x^2-5x-3
We know it has 3 roots since it is a 3rd degree polynomial.
Two of the roots are (3+2i) and (3-2i)
Subtract x^2-5x-3 from both sides
x^3-4x^2+2x+10-(x^2-5x-3)=x^2-5x-3 -(x^2-5x-3)
Distribute the minus sign
x^3-4x^2+2x+10-x^2+5x+3=x^2-5x-3 -x^2+5x+3
x^3 -5x^2+7x +13 =0
Graphing this equation , we see that it crosses the x axis at x=-1
That covers the three roots, 1 real and two complex
Equations can be solved in several ways; one of these ways is the graphical method.
The number of commercials, x, and the number of movies, y, on which Naomi's songs were played are 5 and 2, respectively.
Let:
<em /><em> commercials</em>
<em /><em> movies</em>
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She earned a total of $300.
This is represented as:
Her songs were played on 3 more commercials than movies.
This is represented as:
See attachment for the graphs of
From the graph, the lines of both equations intersect at:
This means that:
- <em>The number of movies is 2</em>
- <em>The number of commercials is 5</em>
<em />
<em />
Read more about linear equations at:
