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2 years ago

13

The melting point of substance X is -20 degrees Celsius and the boiling point is 90 degrees Celsius. How many Celsius degrees ar

e there between the melting point and the boiling point?
20 degrees C
70 degrees C
90 degrees C
110 degrees C

2 answers:

Marat540 [252]2 years ago

8 0

Answer:

The answer is 110 degrees C.

Step-by-step explanation:

The melting point of substance X is -20 degrees Celsius and the boiling point is 90 degrees Celsius.

To find the difference between the degrees, we will subtract the values.

So, the difference between these points will be =

$90-(-20)$

= $90+20=110$

The answer is 110 degrees C

Kazeer [188]2 years ago

3 0

To find the distance between 2 numbers you must take the absolute value of the difference

|90-(-20)|
|110|
110

110 degrees celsius

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In which number is the digit 5 one-tenth as much than it is in the number 25,973?

garik1379 [7]

Let's first look at the number that we are given.25,973. We would read this number as eighty-nine and five hundred forty seven thousandths.

In this number, the 5 is in the tenths place. That is equivalent to 5/10 or five tenths (five divided by ten or 0.5).

The questions asks you to write a number in which the digit "5" is one-tenth the value of the number 5 in 25,973

You are looking for a number that is one-tenth of 0.5. Remember, one-tenth equals 1/10 which equals 0.1.

One-tenth of 0.5 equals 0.1 multiplied by 0.5 which equals 0.05. Hence, the number 5 has to be in the hundredths place to answer the question.

Using the number that we were given (89.547), if you multiply 25,973 by (1/10) you get 8.9547.

In the number 8.9547, the digit 5 is one-tenth the value of the number 5 in 25,973

The answer is 8.9547.

I hope this explanation helps.

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3 years ago

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sweet-ann [11.9K]

Answer:

The proportion of all young adult women in the United States are taller than 6 feet(72 inches ) is

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Step-by-step explanation:

From the question we are told that

The mean is $\mu = 64 \ inches$

The standard deviation is $\sigma = 2.7 \ inches$

Generally 6 feet is equivalent to 6 * 12 = 72 inches

Generally the proportion of all young adult women in the United States are taller than 6 feet(72 inches ) is mathematically represented as

$P( X > 72) = P(\frac{X - \mu }{\sigma } > \frac{72 - 64 }{ 2.7 } )$

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3 years ago

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Answer:

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3 years ago

2x+3y=1 and y=-2 - 9 solve using linear combination method. Please explain steps.

kaheart [24]

Answer:

$x=17$

Step-by-step explanation:

$2x+3y=1$

$y=-2-9$

In order to combine these two equations, an idea you need to keep in mind is finding a way of setting these equations as equal to each other. I saw that each equation shared a common value, $y$ . In this case, we need to isolate $y$ in the first equation so that both equations $=y$ .

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With this, we now know that both $-2-9$ and $-\frac{2}{3}x+\frac{1}{3}$ are equal to $y$ , so we can set them equal to each other.

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$-\frac{2}{3}x+\frac{1}{3}=-11$

Reply to this if anything I'm saying or doing is confusing in any way, or if you find a mistake. :) Solve for $x$ .

$-\frac{2}{3}x+\frac{1}{3}=-11$

$-\frac{2}{3}x=-11-\frac{1}{3}$

$-\frac{2}{3}x =-\frac{33}{3}-\frac{1}{3}$

$-\frac{2}{3}x =-\frac{34}{3}$

$-\frac{2}{3}x(-\frac{3}{2})=-\frac{34}{3}(-\frac{3}{2})$

$x=\frac{102}{6}=17$

$x=17$

Hopefully this answer is correct AND makes sense in terms of how I achieved it. Again, reply to this with any questions or mistakes I made and I'll do my best to answer or fix them.

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