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Kay [80]
3 years ago
8

Find the positive solution of x when: 25 = 4/x²

Mathematics
1 answer:
sladkih [1.3K]3 years ago
7 0
1) Multiply both sides by x²

25 {x}^{2} \: = \: 4

2) Divide both sides by 25

{x}^{2} \: = \: \frac{4}{25}

3) Square root both sides

x \: = \: \frac{2}{5}



Viola!
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Answer: (3,4)

Step-by-step explanation:

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Which of the following shows a 60 degree counterclockwise rotation of Figure A using center P?​
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Answer:

30....... ...... ......

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2 years ago
Find 4 consecutive odd numbers such that twice the sum of the least 2 numbers is 40 less than three times the sum of the greates
ANTONII [103]
4 consecutive odd numbers....x, x + 2, x + 4, x + 6

2(x + x + 2) = 3(x + 4 + x + 6) - 40
2(2x + 2) = 3(2x + 10) - 40
4x + 4 = 6x + 30 - 40
4x + 4 = 6x - 10
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x = -14/-2
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4 0
3 years ago
Sarah is 6 years older than Amy.
Umnica [9.8K]

Answer:

B.

Step-by-step explanation:

The problem has got to be addition.

The sentence "Sarah is 6 years older than Amy." does not include any hint of subtracting, or multiplying.

A hint of multiplying in a expression would be the word 'times', like "Brandon is 6 times the age of Emily" which eliminates D.

A hint of subtraction in an expression would be the word 'less', like "Brandon is 6 less the age of Emily." which eliminates A and C.

The word 'older' indicates addition, or adding, and if it would have been subtraction, the keyword would be 'younger' because you are subtracting their age, like 19 - 11. The same goes with B, but adding.

Finally, we now know that it is B because there is no other addition choice.

I hope this helped. Please correct me if I am wrong.

8 0
3 years ago
Stereo has a list price of $150 but is on sale for 20% off the list price what is the sale price of the stereo???
8_murik_8 [283]

Answer:

The correct answer is option A.120

Step-by-step explanation:

Let's start by analyzing the information they have given us.

We know that the stereo has a list price of $ 150, but at the time of payment, we are told that it has a 20% discount.

Now we must find out what the discount was applied to know the final price of the stereo.

One way to calculate the percentage would be multiplying 150 by 0.20

150.0.20 = 30

The discount applied is $ 30, so now we just have to subtract that amount from the original price:

150-30 = 120

Therefore, the correct answer is option A.

3 0
4 years ago
Read 2 more answers
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