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masha68 [24]
2 years ago
15

Math test , if 9 = 90 , 8 = 72 , 7 = 56 , 6 = 42 , 3 = ?

Mathematics
2 answers:
eimsori [14]2 years ago
7 0

Answer:

12

Step-by-step explanation:

Elanso [62]2 years ago
6 0

Answer:

3 = 12

Step-by-step explanation:

9 * (9+1) = 9 * 10 = 90

8 * (8+1) = 8 * 9 = 72

7 * (7+1) = 7 * 8 = 56

6 * (6+1) = 6 * 7 = 42

<em>---------------------------</em>

Optional Steps (for bigger numbers):

Hence, the formula is

a = b(b+1)

= b² + b

<em>----------------------------</em>

<em />

Hence,

3 * 4 = 12

Hence,

3 = 12

<em>Hope this helps and be sure to have a wonderful time ahead! :D</em>

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andrew-mc [135]

Answer:

v=\sqrt{\frac{E}{m}}

Step-by-step explanation:

The formula is given as:

E=mv^2

We need to solve this formula for v, that means that v to one side and let it be solved in terms of the other variables (E and m). First, we isolate v:

E=mv^2\\\frac{E}{m}=\frac{mv^2}{m}\\\frac{E}{m}=v^2

To isolate v, and eliminate the "square", we need to take square roots of both sides, that will give us v in terms of the other variables:

\frac{E}{m}=v^2\\\sqrt{\frac{E}{m}}=\sqrt{v^2}\\\sqrt{\frac{E}{m}}=v

Putting v to left side (convention), we finally have:

v=\sqrt{\frac{E}{m}}

7 0
3 years ago
What is the variable in Samuel is six inches taller than his brother Elijah.if Samuel is 48 inches tall,how tall is Elijah
Taya2010 [7]

Answer: Elijah would be 42 inches tall

Step-by-step explanation:

We all know that Samuel is 48 inches while Elijah is 6 inches shorter.

You subtract 6 from 48 to get 42.

Hopefully, this helped. :D

5 0
3 years ago
Select the correct answer Which equation represents a line that is perpendicular to line MN?
taurus [48]

Answer:

D. y = 4x - 6

Step-by-step explanation:

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Therefore,

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From our formula,

4 × - 1 / 4 = - 1

So, option D meets the requirement.

6 0
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Fiesta28 [93]

Answer:

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4 0
2 years ago
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