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Pepsi [2]
3 years ago
11

vincent’s copier can print in 7 hours. chris’s printer can do the same in 13 hours. how long would it take to do the job using b

oth copiers
Mathematics
1 answer:
Viefleur [7K]3 years ago
8 0

Answer:

Step-by-step explanation:

1/7+1/13=1/t

multiply both sides by 7*13*t

13t+7t=7*13

21t=91

t=91/19

it will take 4 hours and 8 minutes

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Please help ASAP really need this
Aleonysh [2.5K]

Answer:

21.79 + c \leq 25

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Step-by-step explanation:

21.79 + c \leq 25 is the correct equation because Joshua is spending 21.79 on flowers, a certain amount on the card, and the maximum he can spend is 25. That is why you use the less than or equal to sign.

To solve, first subtract 21.79 from both sides to get: c \leq 3.21. This means that Joshua can spend up to 3.21 on a card.

Hope it helps!

3 0
3 years ago
Whats the solution of a + 5 > -7?
rosijanka [135]
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Step-by-step explanation:

You just put 1200 over 2000? the end?

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