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cupoosta [38]
3 years ago
9

Differentiation y=x^-5 ?

Mathematics
1 answer:
OLga [1]3 years ago
5 0

Answer:

the differentiation d/dx will be ..... -5x^-6

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A suit is on sale for 72% off. The sale price is $263.20.<br> What is the regular price?
Elis [28]

Answer:

940

Step-by-step explanation:

<em>To find the original price of something that been discount do the following:</em>

  • <em>Subtract the discount from 100 to get the percentage of the original price.</em>
  • <em>Multiply the final price by 100.</em>
  • <em>Divide by the percentage in Step One.</em>

<em>Or we can do the following:</em>

<em>We shall consider the original price as x; hence the discount can be considered as (x−263.20). We can write the equation:</em>

<em>x · 72/100=x - 263.20</em>

<em>x · 18/25 = x - 263.20</em>

<em>Multiply both sides by 25</em>

<em>18x = 25(x - 263.20)</em>

<em>Open the brackets.</em>

<em>18x = 25x-6580</em>

<em>Add 6580 to each side.</em>

<em>6580 +18x = 25x</em>

<em>Subtract 18x from each side.</em>

<em>6580 = 7x</em>

<em>Subtract 7x from each side.</em>

<em>x = 940</em>

<em>Check Answer:</em>

<em>940 * 72% = 676.80</em>

<em>940 - 676.80=263.20</em>

<em>Hence, the regular price is 940.</em>

<em />

<u><em>~lenvy~</em></u>

8 0
3 years ago
Read 2 more answers
Which of these r-value represents the weakest correlation?
Tanya [424]

Answer:

Option C is correct.

The value of r=0.2 represents  the weakest correlation.

Step-by-step explanation:

Strongest correlation states that a linear relationship is indicated by a correlation coefficient of -1 or 1.

Weakest correlation states that a linear relationship is indicated by a correlation coefficient equal to 0 or if the value is nearest to 0, then it also represents the weakest correlation.

From the options, the only r-value that is very close to 0 is 0.2.

Therefore, the r-value represents the weakest correlation is, 0.2

4 0
3 years ago
Read 2 more answers
At a bargain store, Tanya bought 3 items that each cost the same amount. Tony bought 4 items that each cost the same amount., bu
TEA [102]

Answer: Let x represent the cost of one of Tanya's items.

Then the cost of one of Tony's items =x - 2.25. But we have:

3x =4(x - 2.25)

3x =4x - 9 subtract 3x from both sides

0 =x - 9 add 9 to both sides

x=$9 The cost of one of Tanya's items

27 Total cost of Tanya's 3 items

2.25 =$6.75 cost of one of Tony's items.

27 Total cost of Tony's 4 items.

3 x 6.75 =$27. This shows that both Tony and Tanya spent the same amount of money.

Step-by-step explanation:

6 0
3 years ago
Evaluate u^2 -2u+4 when u= -3
OLga [1]

Answer:

Step-by-step explanation: Sub -3 into where all the u’s are. So it would be

(-3)^2 - 2(-3) + 4

Which would equal 19

6 0
3 years ago
A marker was placed at an altitude that is 15 feet below sea level.
xxTIMURxx [149]

Answer:

-15 below sea level

-Hope this helps! :)

7 0
3 years ago
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