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3 years ago

Help PLZZ FAST

Mathematics

1 answer:

Dafna11 [192]3 years ago

5 0

<h3>Answer:</h3>

its 25p^2-1

Step-by-step explanation:

the two sides are (5p+1) and (5p-1) so just multiply them

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A student repeatedly measures the mass of an object using a mechanical balance and gets the following values: 560 g, 562 g, 556

MrRissso [65]

Answer: 2.76 g

Step-by-step explanation:

The formula to find the standard deviation:-

$\sigma=\sqrt{\dfrac{\sum(x_i-\overline{x})^2}{n}}$

The given data values : 560 g, 562 g, 556 g, 558 g, 560 g, 556 g, 559 g, 561 g, 565 g, 563 g.

Then, $\overline{x}=\dfrac{\sum_{i=1}^{10} x_i}{n}\\\\\Rightarrow\ \overline{x}=\dfrac{560+562+556+558+560+556+559+561+565+563}{10}\\\\\Rightarrow\ \overline{x}=\dfrac{5600}{10}=560$

Now, $\sum_{i=1}^{10}(x_i-\overline{x})^2=0^2+2^2+(-4)^2+(-2)^2+0^2+(-4)^2+(-1)^2+1^2+5^2+3^2\\\\\Rightarrow\ \sum_{i=1}^{10}(x_i-\overline{x})^2=76$

Then, $\sigma=\sqrt{\dfrac{76}{10}}=\sqrt{7.6}=2.76$

Hence, the standard deviation of his measurements = 2.76 g

6 0

4 years ago

What's the answer to the problem

zvonat [6]

Answer:

Any Images?

Step-by-step explanation:

3 0

3 years ago

An account with $600 earns 4% simple interest per year. The next year all the money is put into a new account that earns 4.5% si

N76 [4]

[First Year]
$600 • 0.04 • 1 year
600 • 0.04 = 24 • 1 = 24

[Second Year]
$600 • 0.045 • 1 year
600 • 0.045 = 27 • 1 = 27

24 + 27 = $51

I believe this is correct and I hope this helps! :)

7 0

3 years ago

Read 2 more answers

(pls help) <br><br> Which of these graphs does not represent a function?

rosijanka [135]

Answer:

Step-by-step explanation:

d is not a function as it doesn't have correct function potential in linear x and y axis

6 0

2 years ago

a rectangular lot is 80 meters wide and 115 meters long give the length and width of another rectangle that had the same perimet

mart [117]

1st...

80 * 115
P = 2 * 80 + 2 * 115
P = 160 + 230
P = 390 is the perimeter

A = 80 * 115
A = 9, 200 is the area.

I could only get the first part done for you maybe others are watching where they can help you with the second part of the question:::

Hope that helps!!!!

7 0

3 years ago