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vfiekz [6]
3 years ago
6

A coin sorting machine can sort a certain number of coins in 15 min a second machine can sort the same number of coins in 30 min

how long would it take both machines working together to do the job?
plz give all the steps that will be marked as the Branilest!!!!!!!!!!!!!!!!!!!!!!!!
Mathematics
1 answer:
padilas [110]3 years ago
7 0

Answer:

10 minutes

Step-by-step explanation:

Let's use the variable x for the amount of coins.

The first machine can sort x coins in 15 minutes, so its speed is x/15 coins/minute.

The second machine can sort x coins in 30 minutes, so its speed is x/30 coins/minute.

If we sum the speeds, we have that the speed will be:

speed = (x/15) + (x/30) = (2x + x)/30 = 3x/30 = x/10

The total speed can sort x/10 coins per minute, that is x coins in 10 minutes.

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Solve -24 + (1-4)^2​
ElenaW [278]

Answer:

-15

Step-by-step explanation:

-24 + (1-4)^2​    (solve parentheses first)

= -24 + (-3)^2 (solve exponent)

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6 0
3 years ago
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The sum of four consecutive integers is 286. Find the four integers
8_murik_8 [283]
Step 1: Write out the problem.
Step 1: Write out the problem.
Step 1: Write out the problem.
x+(x+1)+(x+2)+(x+3)= 286

Step 2: Take out the parentheses.
x+x+1+x+2+x+3= 286

Step 3: Combine like terms.
4x+6= 286

Step 4: Subtract 6 from both sides.
4x+6 -6= 286 -6

Step 5: Divide 4 on both sides.
4x/4 = 280/4

x=70

Which means the answer is 70, 71, 72, 73

Check Work:
70+71+72+73= 286

So this is correct :)
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3 years ago
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IgorC [24]

Answer:

Step-by-step explanation:

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6 0
2 years ago
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Step-by-step explanation:

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3 years ago
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chubhunter [2.5K]

Answer:

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Step-by-step explanation:

<u><em>Irrational number:-</em></u>

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Example:-

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Given option

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