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kari74 [83]
3 years ago
13

Please tell me the answer! I'm crying in confusion! :(

Mathematics
2 answers:
Natalka [10]3 years ago
8 0
Find the common denominator:

3   6   9
--  --   --  
7  14  21

1  2  3  4  5  6      7     8
--  -- -- -- -- -- --   ---    ---
3  6  9  12  15    18    21

Ok, so we know the common demonators are 9/21 and 8/21

Now we subtract  9/21 and 8/21 which is 1/21 

So.. There is 1/21 pizza left!

Hope this helped :))

Inessa [10]3 years ago
6 0
First, change the fractions to a common denominator, which is 21. 

so 3/7 * 3/3  = 9/21

1/3 * 7/7 = 7/21

Add the two together

9/21 + 7/21 = 16/21

Then take 21/21 - 16/21 = 5/21

There is 5/21 of the pizza left.
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What is an equation of the line that passes through the point (8,-5) and is parallel
HACTEHA [7]

Answer:

y=-5/4x+5

Step-by-step explanation:

Hi there!

We're given the line 5x+4y=24 and we want to find the line parallel to it that passes through (8,-5)

Parallel lines have the same slopes

First, we need to find the slope of 5x+4y=24.

We'll do that by converting 5x+4y=24 from standard form (ax+by=c where a, b, and c are integers) to slope-intercept form (y=mx+b where m is the slope and b is the y intercept)

subtract 5x from both sides

4y=-5x+24

divide by 4 on both sides

y=-5/4x+6

since -5/4 is in the place where m should be, it is the slope.

So the equation of the line parallel to it will also have -5/4 as the slope

Here's the equation so far in slope-intercept form:

y=-5/4x+b

we need to find b

because the equation will pass through (8,-5), we can use it to solve for b

substitute 8 as x and -5 as y

-5=-5/4(8)+b

multiply

-5=-10+b

add 10 to both sides

5=b

substitute 5 as b into the equation

<u>y=-5/4x+5</u>

That's the equation of the line parallel to 5x+4y=24.

Hope this helps!

6 0
3 years ago
Tan x-1/tan x+1=1-cot x/1+cotx
ikadub [295]
\dfrac{\tan x-1}{\tan x+1}=\dfrac{\frac{\sin x}{\cos x}-1}{\frac{\sin x}{\cos x}+1}=\dfrac{\sin x-\cos x}{\sin x+\cos x}=\dfrac{1-\frac{\cos x}{\sin x}}{1+\frac{\cos x}{\sin x}}=\dfrac{1-\cot x}{1+\cot x}
6 0
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damaskus [11]

Answer: 1/5 with an exponent of 5.

hope this helps :)

7 0
2 years ago
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Alchen [17]
Try to use photo math it gives you the work and answer
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What is 54/12 in a mixed number?
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12 can go into 54 only 4 times because 4•12 is 48. Now 56-48=6 so this is the remainder 6/12 wish can be simplified to 1/2 so your answer is 4 1/2 or 4.5. Hope this helps <333
8 0
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