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Ludmilka [50]
3 years ago
11

Will give brainliest if it's correct!!

Mathematics
2 answers:
a_sh-v [17]3 years ago
6 0
The answer is b i think
kap26 [50]3 years ago
3 0
C. 2y=5 
standard form is Ax+By=C
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In - ABC shown below, side AC is extended to point D with mZ DAB = (180 – 3x) °,
Setler [38]

Answer:

<BAC = 36degrees

Step-by-step explanation:

Find the diagram attached

The sum of the interior angle is equal to the exterior. Hence;

<B + <C = <DAB

6x+40 + x+20 = 180 - 3x

7x+60 = 180 - 3x

7x+3x = 180 - 60

10x = 120

x = 120/10

x = 12

Get <BAC

<BAC = 180 - (180-3x)

<BAC = 180-180+3x

<BAC = 3x

<BAC = 3(12)

<BAC = 36degrees

4 0
3 years ago
How do you find percentages?
DochEvi [55]
To calculate percentage increase, use the following method:

First, Work out the difference (increase) between the two numbers you are comparing.

Increase = New Number - Original Number

Now, divide the increase by the original number and multiply the answer by 100.

% increase = Increase ÷ Original Number × 100.

Also, If your answer is a negative number it is a percentage decrease.


To calculate percentage decrease, use this method:

First, Work out the difference (decrease) between the two numbers you are comparing.

Decrease = Original Number - New Number

Then, divide the decrease by the original number and multiply the answer by 100.

% Decrease = Decrease ÷ Original Number × 100

Also, If your answer is a negative number then it is a percentage increase. 

<span>If you wish to calculate the percentage increase or decrease of several numbers then I recommend using the first formula.  Positive values indicate a percentage increase whereas negative values indicate percentage decrease.</span>

4 0
3 years ago
The diagonals of a rhombus are 16 cm and 12cm. find its length​
igomit [66]

Answer:

l=10 cm

Step-by-step explanation:

In a rhombus, the diagonals are cut into identical lines at the intersection.

This way, I found the measures of the halves of the diagonals in a right triangle, knowing that the diagonals of the rhombus are perpendicular on each other.

I calculated that AO = AC/2= 8, and that BO=BD/2= 6, and then I applied pytagora's theorem in a quarter of the rhombus, which is the right triangle AOB, to find the length of a side

4 0
3 years ago
Find the sum of the arithmetic series given a1
Kay [80]
It’s B trust me I know
5 0
3 years ago
Read 2 more answers
Solve for RN.<br> 50 points in it for you plus a thanks, 5 star rate and brainliest!
ohaa [14]

Let RN be x

\\ \sf\longmapsto \dfrac{10}{x}=\dfrac{8}{5}

\\ \sf\longmapsto 8x=50

\\ \sf\longmapsto x=\dfrac{50}{8}

\\ \sf\longmapsto x=6.2

4 0
3 years ago
Read 2 more answers
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