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3 years ago

Negative 5x equals negative 40

Mathematics

1 answer:

Diano4ka-milaya [45]3 years ago

3 0

$-5x=-40

5x=40

x=40/5

x=8$

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klemol [59]

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balance = - $2

<span>There is an excess of 2 dollars at the end.</span>

4 0

3 years ago

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

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4 years ago

What is compatible number to find two estimates that the quotient is between 1624÷3

Vladimir [108]

1500÷3 =500

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3 years ago

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Julio debe $ 41225 al banco por concepto del préstamo para invertir en su casa.

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How do you send a picture for answering a question.

Nina [5.8K]

You have to upload it from your computer before you press "ADD YOUR ANSWER"

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