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3 years ago

Find the missing die length

Mathematics

1 answer:

Wewaii [24]3 years ago

6 0

$\cos(60) = \frac{ \sqrt{3} }{u} \\ \frac{1}{2} = \frac{ \sqrt{3} }{u} \\ u = 2 \sqrt{3}$
${v}^{2} + 3 = {u}^{2} \\ {v}^{2} + 3 = 12 \\ v = 3$

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You need a 25% alcohol solution. On hand, you have a 225 mL of a 35% alcohol mixture. How much pure water will you need to add t

Radda [10]

You will need 252 mL of pure water to obtain 0.25 mL of the desired 25% solution.

If we add X amount of water to the solution, the total amount of solution is 375+X.

And that must be 25%.

<h3>What is the amount of solute in the current solution?</h3>

The amount of solute in the current amount of solution is

0.6(375)=225.

That amount won't change by adding water.

So we set up the equation so that the amount of solute divided by the new total amount of solution equals 25%.

225/(375+X)=0.25

cross multiply and solve

225/0.25=(375+X)

900-375=X

X=525

The pure water will you need to add to obtain the desired solution is 525.

Then we check 225/(375+525)=0.25.

To learn more about the mixture problem visit:

brainly.com/question/24647756

#SPJ1

7 0

2 years ago

Eight times the sum of a number and 3 is 9

Ivanshal [37]

Answer:

Step-by-step explanation:

∨ × → ( n + 3) = 9

Eight times the sum of a number and 3 is 9

--------------------------------------------------------------------------------

8(n + 3) = 9

6 0

3 years ago

-21=-39k+-24<br><br> Please give me an explanation.

Vikki [24]

Answer:

-1/3

step-by-step explanation:

-21=-39k+-24

39k = -24 + 21

39k = -3 (divide each side by 39)

k = -1/3

8 0

3 years ago

How does the stimulus check impact society please help me please i really need help please

Tasya [4]

Answer: Stimulus checks are given to boost the economy by providing consumers with funds to spend. Consumer spending is an essential component of a healthy economy and, in times of economic uncertainty, it usually contracts.

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3 years ago

0.3d-1/3 1/3=.84:7/15

telo118 [61]

Answer:

$d=\frac{147}{6.3}$

Step-by-step explanation:

The right side is a ratio $0.84:\frac{7}{15}$
a ratio can be written as a fraction $\frac{0.84}{\frac{7}{15} }$ this means $0.84$ divide by $\frac{7}{15}$ which is the same as $0.84*\frac{15}{7}=\frac{12.6}{7}$
On the left, change the mixed fraction $3\frac{1}{3}$ to the improper fraction $\frac{10}{3}$
Then divide $0.3d-1$ by $\frac{10}{3}$ which is same as $(0.3d-1)*\frac{3}{10} =\frac{3(0.3d-1)}{10}$
So the equation is now $\frac{3(0.3d-1)}{10}=\frac{12.6}{7}$
Now multiply both sides by 10 and 7:
$(10)*(7)*\frac{3(0.3d-1)}{10}=\frac{12.6}{7}*(7)*(10)\\7*3(0.3d-1)=12.6*(10)\\21*(0.3d-1)=126\\6.3d-21=126\\6.3d-21+(21)=126+(21)\\6.3d=147\\d=\frac{147}{6.3}$

4 0

3 years ago

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