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riadik2000 [5.3K]
2 years ago
11

If two pyramids are similar and the ratio between the lengths of their edges is 2:7, what is the ratio of their volumes? O A. 49

:4 O B. 2:7 O C. 4:49 O D. 8.343​
Mathematics
1 answer:
vodka [1.7K]2 years ago
8 0

Answer:

D. 8.343

Step-by-step explanation:

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Which expression is the same as 10÷4?
Alex777 [14]
The answer would be D because when you divide 10 by 4 you take one fourth out of ten
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3 years ago
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When seven is subtracted from half of a number, the result is negative three. Find the number
Harlamova29_29 [7]

Answer:

8

Step-by-step explanation:

0.5x-7=3

add 7 to both sides

0.5x=4

multiply both sides by 2

x=8

5 0
2 years ago
I need help please and thanks
Luba_88 [7]

1. 3p: Add 6 to negative 3, and carry over the "p"

3. 6x: Subtract 1 from 7 and carry over the "x"

5. -4v: Add 6 to negative 10 and carry over the "v"

7. -4r + 9: Add 5 to -9 and carry over the "r". Then put "+9" after the variable, since the other 9 was by itself.

9. 14n: Add 5 to 9 and carry over the "n".

I hope this helps!

8 0
3 years ago
A square patio has a perimeter of (8x + 48) feet. What is the length of the patio?
4vir4ik [10]

Answer:

2x+12

Step-by-step explanation:

We have a square patio, then each side of the patio has the same lengt. As we know the perimeter of a square is the sum of all sides. Then to know the length of the patio we just need to divide by 4 the perimeter.

\dfrac{(8x+48)}{4}=\dfrac{8x}{4}+\dfrac{48}{4}=2x+12

Then each side of the square patio has a length of  2x+12

7 0
3 years ago
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What was Mike's average rate of descent over his last three hours?
Romashka [77]

Answer:

<em>The average rate of descent over the last 3 hours is 1000 ft/h. </em>

Step-by-step explanation:

<u>Rate of Change</u>

It's usually referred to as to the variation that one magnitude has in reference to another. The reference magnitude can be time t. The rate of change is calculated as the slope of the curve that represents the function.

The image shows the variation of Mike's height above sea level in feet with time in hours. We need to calculate the rate of change in the last three hours (from 7 to 10).

The rate of change can be calculated with the slope of the line, which formula is:

\displaystyle m=\frac{h_2-h_1}{t_2-t_1}

Let's pick two points (7,4000) (10,1000):

\displaystyle m=\frac{1000-4000}{10-7}=\frac{-3000}{3}=-1000

m=-1000\ ft/h

Note the rate of change is negative, which means the height is decreasing.

The average rate of descent over the last 3 hours is 1000 ft/h.

8 0
3 years ago
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