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mezya [45]
2 years ago
14

Find the value of n in 2m-3n = 6 and 2m + 6n = 12.​

Mathematics
1 answer:
Nezavi [6.7K]2 years ago
4 0

Answer:

n = 2/3

Step-by-step explanation:

2m - 3n = 6

– 2m + 6n = 12

<u>____-____-___</u>

-9n = -6

n = -6/-9

n = 2/3

Hence, the value of n in the given equations is 2/3.

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Answer:

A. f(x)= -(x-3)^(2)-2

Step-by-step explanation:

graphing the parabola, using the direction, vertex, focus, an axis of symmetry, we see that the direction it opens is down, like the picture shows. The vertex is at (3, -2), focus is (3,-9/4), axis of symmetry is x=3, and the directrix is y = -7/4 just as the picture shows. Therefore, A is the correct answer.

Hope this helps!!

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3 years ago
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Why does putting a lid over red cabbage help it keeps it color
Dahasolnce [82]

Answer:

It is blocking out some bacteria that feast on the cabbage.making it lose it's color.

Step-by-step explanation:


7 0
3 years ago
Find the area of the pyramid net
cupoosta [38]
<h2><em>The area of the pyramid net is 12 units</em></h2>

Step 1

Find the area of the Square in the middle

Formula for finding square:

A = L*W

Let's apply the formula and find our answer:

A = 2*2\\=4

<em>The area of the square is 4 units</em>

<em></em>

Step 2

Find the area of all 4 triangles around the square

As you know, the formula for finding 1 triangle is as follows:

A = \frac{1}{2} *B*H

But, to find the area of 2 triangles, we can use this formula:

A=B*H

And to find 4 of them (with same dimensions;as required here), we can use this one:

A=2*B*H

Let's apply the formula then! What are we waiting for!!!!

A=2*2*2\\=2*4\\=8

<em></em>

<em>The area of ALL of the triangles around the square is 8 units</em>

<em></em>

Step 3

Add all areas to find FINAL ANSWER!

Easy!

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6 0
1 year ago
Read 2 more answers
HELP ME PLEASE
-Dominant- [34]

The total number of cars both the student and the teacher made is 49

let

total cars = x

cars made by student = s

cars made by teacher = t

Total = student + teacher

x = s + t

s = 2/7x

So,

x = 2/7x + t

x - 2/7x = t

t = (7x - 2x) / 7

t = 5/7x

Similarly,

s = t - 21

s = 5/7x - 21

equate both s equation

2/7x = 5/7x - 21

2/7x - 5/7x = -21

(2x - 5x) / 7 = -21

- 3/7x = -21

x = -21 ÷ -3/7

= -21 × - 7/3

= (-21 × -7) / 3

= 147/3

x = 49

Therefore, the total number of cars both the student and the teacher made is 49

Learn more about fractions:

brainly.com/question/11562149

3 0
2 years ago
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