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3 years ago

CAN SOMEONE PLEASE HELP!!!

Mathematics

1 answer:

bixtya [17]3 years ago

4 0

He spends 30 hours at work from 10 hours of recreational time

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Corey and Devante both leave the park at the same time but in opposite directions if Corry travels 30 mph and Devonta travels 22

telo118 [61]

Answer:

2 hours 1 minute 9.23 seconds

Step-by-step explanation:

Since they are traveling in opposite directions, their separation speed is the sum of the magnitudes of their speeds: 30 +22 = 52 mph.

The time is related to speed and distance by ...

time = distance / speed

= (105 mi)/(52 mi/h = 2 1/52 h ≈ 2 h 1 min 9.23 sec

It will take a little over 2 hours before they are 105 miles apart.

4 0

3 years ago

Doreen Schmidt is a chemist. She needs to prepare 32 ounces of a 13% hydrochloric acid solution. Find the amount of 16% soluti

klasskru [66]

Answer:

She should mix 20 ounces of 16% solution and 12 ounces of 8% solution.

Step-by-step explanation:

Given:

Doreen Schmidt needs to prepare 32 ounces of a 13% hydrochloric acid solution.

Now, to find the amount she should mix of 16% solution and of 8% solution.

Let the 16% solution amount be $x.$

And let the 8% solution amount be $y.$

So, the total ounces of solution:

$x+y=32$

$y=32-x$ .......(1)

Now, to solve the equation to get the solution she should mix:

$16\%\ of\ (x)+8\%\ of\ (y)=13\%\ of\ (32)\\\\\frac{16}{100}\times x+\frac{8}{100}\times y=\frac{13}{100}\times 32$

$0.16x+0.08y=0.13\times 32$

Substituting the value of $y$ from equation (1) we get:

$0.16x+0.08(32-x)=4.16$

$0.16x+2.56-0.08x=4.16$

$2.56+0.08x=4.16$

Subtracting both sides by 2.56 we get:

$0.08x=1.6$

Dividing both sides by 0.08 we get:

$x=20.$

The 16% solution amount = 20 ounces.

Now, substituting the value of $x$ in equation (1) we get:

$y=32-x\\\\y=32-20\\\\y=12.$

The 8% solution amount = 12 ounces.

Therefore, she should mix 20 ounces of 16% solution and 12 ounces of 8% solution.

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4 years ago

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Flura [38]

54.75 square feet is the answer

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3 years ago

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8/9+2/3 in simplest form

svetlana [45]

Answer: 14/9

Step-by-step explanation:

multiple forms of simplfied answers.

Decimal: 1.5 (bar notation above 5)

Mixed Number: 1 5/9

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4 years ago

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If 3 pieces of candy cost $2.10, how much would four pieces cost

vitfil [10]

2.80 you divide 2.10 by 3 that will give you .7 or .70 then you add 70cents to 2.10.

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4 years ago

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