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1 year ago

7

Sandy brought 6 1/4 dozen cookies to the bake sale. Alejandro brought 1 3/4 fewer cookies than Sandy brought. Pierre brought 2 3

/4 dozen fewer cookies than Alejandro brought. How many dozen cookies did Pierre bring?

1 answer:

pentagon [3]1 year ago

7 0

Answer: 4 1/2 doezen cookies

Step-by-step explanation: just subtract. Hope this helps.

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3 years ago

A transformer increases the input voltage from 12V to 12,000V. What is the ratio of the number of wire turns on the primary coil

erma4kov [3.2K]

Answer:

$\frac{n_p}{n_s}=\frac{1}{1000}$

Step-by-step explanation:

Given voltage of primary coil is $V_p=12V$

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A transformer is a device that contains primary and secondary coil. These coils are mounted on soft iron. The change in voltage depends upon the number of turns of primary coil $(n_p)$ and secondary coil $(n_s)$ .

Following equation represents the relation between them.

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Then, ratio of the number of wire turns on the primary coil to the number of turns on the secondary coil is

$\frac{n_p}{n_s}=\frac{1}{1000}$

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3 years ago

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Step-by-step explanation:

x=7x-21
21=7x-x
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