Answer:
D(- 1) = 2
Step-by-step explanation:
To evaluate D(- 1), substitute x = - 1 into D(x) , that is
D(- 1) = (- 1)² - 2(- 1) - 1 = 1 + 2 - 1 = 2
Answer:
24x - 103
Step-by-step explanation:
calculate 24x +18- 121
Answer:
Step-by-step explanation:
<u>Volume of a cone:</u>
<u>We have:</u>
- V = 1200 cm³
- r = 6 cm
- h = ?
<u>Substitute values and solve for h:</u>
- 1200 = 1/3*3.14*6²h
- 1200 = 37.68h
- h = 1200/37.68
- h = 31.8 cm (rounded)
None of the choices is correct
Answer:
Area of this parallelogram: 35.
Step-by-step explanation:
What's the equation for the area A of a parallelogram?
A = b · h,
where
- b is the length of the base, and
- h is the length of the height <em>on that base</em>.
Plot the four vertices on a cartesian plane. Two opposite sides of this parallelogram are parallel to the x-axis. As a result, the length of the base is the same as the difference in x-coordinates between two vertices on that side. As seen on the diagram, the length of this base is b = 2 - (-5) = 7.
The height on either of those two sides will be normal to the x-axis and parallel to the y-axis. The length of those heights will be the same as the difference in y-coordinates between two vertices, one on each line. As seen on the diagram, the length of the height on base <em>b</em> is h = 4 - (-1) = 5.
Area of this parallelogram:
A = b · h = 5 × 7 = 35.