Is this on a graph if so you need to explain futher
Answer:
3
Step-by-step explanation:
Intersections on the x axis occur when y = 0. f(x) is another term for y, so set f(x) equal to zero and solve for the two possible x's.
0 = x^2 - 3x - 40
0 = (x-8)(x+5)
By solving for x, you get 8 and -5. 8 and -5 added together will equal 3.
Answer:
The area of the rectangle on the left side is
![9cm \: \times 4cm = 36 {cm}^{2}](https://tex.z-dn.net/?f=9cm%20%5C%3A%20%20%5Ctimes%204cm%20%3D%2036%20%7Bcm%7D%5E%7B2%7D%20)
The area of the bottom rectangle is
![6cm \times 2cm = 12 {cm}^{2}](https://tex.z-dn.net/?f=6cm%20%5Ctimes%202cm%20%3D%2012%20%7Bcm%7D%5E%7B2%7D%20)
The total area of the composite figure will be
![36 {cm}^{2} + 12 {cm}^{2} = 48 {cm}^{2}](https://tex.z-dn.net/?f=36%20%7Bcm%7D%5E%7B2%7D%20%20%2B%2012%20%7Bcm%7D%5E%7B2%7D%20%20%3D%2048%20%7Bcm%7D%5E%7B2%7D%20)
Step-by-step explanation:
The area of any given rectangle can be found by multiplying the length of that rectangle by its width. The rectangle on the left side has a length of 9cm but the width is unknown. To find the width, we subtract 6cm from the width of the bottom rectangle: 10cm. And that gives us 4cm.
Therefore, we can now calculate the area to be: length × width = 9cm × 4cm = 36cm²//
The area of the bottom rectangle can be found similarly by multiplying the length: 2cm by the width: 6cm of that rectangle. And the result gives us: 2cm × 6cm = 12cm²//
The total area of the composite figure is calculated by adding the results from the left and bottom rectangles together. And that gives us: 36cm² + 12cm² = 48cm²//
it would be $1.83 because your dividing right?