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11Alexandr11 [23.1K]
3 years ago
14

Solve for a: a(a-3) =100

Mathematics
1 answer:
marissa [1.9K]3 years ago
5 0
a(a-3) =100\\
a^2-3a-100=0\\
\Delta=(-3)^2-4\cdot1\cdot(-100)=9+400=409\\
\sqrt{\Delta}=\sqr{409}\\
a_1=\dfrac{-(-3)-\sqrt{409}}{2\cdot1}=\dfrac{3-\sqrt{409}}{2}\\
a_2=\dfrac{-(-3)+\sqrt{409}}{2\cdot1}=\dfrac{3+\sqrt{409}}{2}
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Find the volume of the cone.
Alona [7]

answer:

2,558

step-by-step explanation:

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with that let us 'fill in' the formula-

v=π*9.6²*26.5/3

v=2,557.51

then since you've asked us to round the answer to the nearest whole number that would be 2,558

good luck :)

i hope this helps

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3 years ago
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Liono4ka [1.6K]

Answer:

Step-by-step explanation:

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5 0
3 years ago
Read 2 more answers
Make U the subject of the formula <br> D = ut + kt2
natali 33 [55]

Remark

I'm going to interpret this equation as

D = ut + kt²  The only difference is the 2.

Solution

Subtract kt² from both sides.

D - kt² = ut   Now divide by u on both sides.

\dfrac{D - kt^2}{t} = \dfrac{ut}{t}

The t's cancel out. on the right.  You are left with u on the right.

\dfrac{D - kt^2}{t} =\text{u}


6 0
3 years ago
Find the volume of the composite space figure to the right to the nearest whole number.
matrenka [14]
I'm not sure... I think it is 60 because 2*3=6 and 9*6=54 and when you add them together you get 60.
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3 years ago
Is there a formula for problems like these? How do I even begin to solve it?
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