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emmasim [6.3K]
3 years ago
11

2. An advertising firm has an old computer that can prepare a whole mailing in 6 hours. With

Mathematics
1 answer:
Sphinxa [80]3 years ago
8 0

Answer:

The new model can do the entire work alone in 3 hours.

Step-by-step explanation:

Let us assume that the newer model of computer can complete the job alone in x hours.

Therefore, in one hour this new model can do \frac{1}{x} part of the job.

Again the old model can do the entire job alone in 6 hours,

So, in 1 hour the old model can do \frac{1}{6} part of the job.

Therefore, if they work together, then in 1 hour they will do (\frac{1}{6} +\frac{1}{x} )= \frac{x+6}{6x} part of the job.

So, the entire work they can do together in \frac{6x}{x+6} hours.

So, given that \frac{6x}{x+6}=2  

⇒ 6x = 2x + 12

⇒ x = 3 hours,

Therefore, the new model can do the entire work alone in 3 hours. (Answer)

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3 years ago
Solve: the sum of two numbers is 70. one number is 4 times the other. what are the two numbers?
Thepotemich [5.8K]
Lets say two numbers are x and y

x+y=70-----------------------eq1

x=4y--------------------eq2

4y+y=70
5y=70
y=70/5
y=14 

then x=4*14

x=56


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3 years ago
1) Working alone, Ryan can dig a 10 ft by 10 ft
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Step-by-step explanation:

(Ryan+ castel)/2

(5+6)/2

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3 years ago
Am I right on this one.
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i think it is because...

the slope of line b is slightly steeper than the slope of line a.

hope this helps!

6 0
3 years ago
Read 2 more answers
Which expression is equivalent to 6 Superscript 4 times 6 cubed?
algol [13]

Answer:

(6x6x6x6)x(6x6)

Step-by-step explanation:

6 to the power of 4 times 6 to the power of 2

If a number a is to the power of b, that means a multiplied by itself, b times

eg 4 to the power of 3 means 4x4x4

hence, 6 to the power of 4 (or superscript four) means 6 itself, 4 times

so, 6x6x6x6 multiplied by 6x6

8 0
4 years ago
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