- For calculate a angle we use Protactor .
- First place the protractor at 0 and starting point of angle .
- Now count the angle where it meets .
15. The volume of a rectangular pyramid
1 answer:
Answer:
Its height is <u>24.71 centimeters</u>.
Step-by-step explanation:
Given:
The volume of a rectangular pyramid is 10,500 cubic centimeters.
It has a length of 15 centimeters and a width of 85 centimeters.
Now, to find the height.
Let the height be
Volume of rectangular pyramid = 10,500 cubic centimeters.
Length (l) = 15 centimeters.
Width (w) = 85 centimeters.
Now, to get the height by putting formula:
<em>Multiplying both sides by 3 we get:</em>
<em>Dividing both sides by 1275 we get:</em>
Therefore, its height is 24.71 centimeters.
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Answer:
B, C, and D.
Step-by-step explanation:
Let's go through each answer choice.
A: To find the slope of a line from two points, we use this formula: . Plugging in the values (-2,0) and (2, -4), we get:
Because option A says the slope is 1, but we got -1, option A is false.
B: To find the y-intercept, we use this formula:
Since we know the value of b is the y-intercept, we could write the y-intercept as (0,-2). Therefore, option B is true.
C: The equation of a line (in slope-intercept form) is y = mx + b, where y - y-coordinate, m = slope, x = x-coordinate, and b = y-intercept. Since we already solved for the y-intercept and slope, let's plug in those values:
As you can see, the equation we got here matches the one in option C, meaning it's true.
D: We know that a point is written like this: (x, y). If the x-coordinate is not zero but the y-coordinate is, then it's the x-intercept. Since the question says that (-2,0) is one of the points the line passes through, and option D says that the x-intercept is (-2,0), it's true.