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inn [45]
3 years ago
6

Please help and thank you

Mathematics
2 answers:
Mariana [72]3 years ago
7 0

Answer:

B.    l = (S - πr^2) / πr

Step-by-step explanation:

S = πrl + πr^2 solve for l

πrl = S - πr^2

  l = (S - πr^2) / πr

Answer is B.    l = (S - πr^2) / πr

german3 years ago
3 0

Solve for L (get L by itself)

S = πrl + πr²    First subtract πr²

S - πr² = πrl    Then divide πr to get L by itself

(S-πr²) ÷ (πr) = l    Your answer is B

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Solve H= -b divided by 2a for b
nata0808 [166]

Answer:

b=-2aH

Step-by-step explanation:

H=-b/2a

Apply cross multiplication

H×2a=-b

2aH=-b

In the question you are to find positive b not negative b so you have to take negative b to the left hand side of the equation to become positive b and take 2aH to the right hand side to become -2aH

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7 0
3 years ago
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nadya68 [22]
<span>x=3y-8
3x-4y=-9

We are told that:
</span>x=3y-8

So replace x in 3x-4y=-9 with x=3y-8 like so: 
3(3y-8)-4y=-9 

Start by distributing the 3: 
(3)(3y)+(3)(-8)+-4y=-9
Now you have: 
9y+-24+-4y=-9&#10;
Combine like terms, now you have: 
5y-24=-9&#10;
add 24 to both sides 
5y-24+24=-9+24&#10;
Now you have:
5y=15
Divide both sides by 5 to get: 
y=3 

Now that you know y=3 plug it into: 
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x=3(3)-8
x=1 

Final answer: 
(1,3) 
5 0
3 years ago
Read 2 more answers
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Aliun [14]

DO you have choices?


3 0
3 years ago
I will give brainilest
den301095 [7]

Answer:

63°

Step-by-step explanation:

Vertical angles are equal to each other.

8 0
2 years ago
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7 0
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