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3 years ago

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You need a 35% alcohol Solution on hand you have a 270 mL of a 30% alcohol mixture you also have 80% alcohol mixture how much of

the 80% mixture will you need to obtain the desired solution
you will need
_____mL of the 80% solution
_____mL of the desired 35% solution

1 answer:

FinnZ [79.3K]3 years ago

4 0

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I need help on math hw

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Someone help me pls <br><br>47 as the sum of ______

Elanso [62]

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Answer:

(a) 6² +3² +1² +1² = 47

(b) 5² +4² +2² +1² +1² = 47

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Step-by-step explanation:

It can work reasonably well to start with the largest square less than the target number, repeating that approach for the remaining differences. When more squares than necessary are asked for, then the first square chosen may need to be the square of a number 1 less than the largest possible.

The approach where a cube is required can work the same way.

(a) floor(√47) = 6; floor(√(47 -6^2)) = 3; floor(√(47 -45)) = 1; floor(√(47-46)) = 1

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(b) floor(√47 -1) = 5; floor(√(47-25)) = 4; ...

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(c) floor(∛47) = 3; floor(√(47 -27)) = 4; floor(√(47 -43)) = 2

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3 years ago

For a craft project, two equilateral triangles are taped together to create a quadrilateral.

Anika [276]

If these are the missing parts:

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a.rhombus
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The quadrilateral formed by the </span><span>two equilateral triangles taped together is A. RHOMBUS.

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3 years ago

If x= sin theta then x/√1-x^2 is

SCORPION-xisa [38]

Well,

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Now use, $\cos(\theta)^2+\sin(\theta)^2=1$ which implies that $1-\sin(\theta)^2=\cos(\theta)^2$

That means that,

$\dfrac{\sin(\theta)}{\sqrt{1-\sin(\theta)^2}}\Longleftrightarrow\dfrac{\sin(\theta)}{\sqrt{\cos(\theta)^2}}$

By def $\sqrt{x^2}=x$ therefore $\sqrt{\cos(\theta)^2}=\cos(\theta)$

So the fraction now looks like,

$\dfrac{\sin(\theta)}{\cos(\theta)}$

Which is equal to the identity,

$\boxed{\tan(\theta)}=\dfrac{\sin(\theta)}{\cos(\theta)}$

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3 years ago