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2 years ago

Can someone please help me

Mathematics

2 answers:

faust18 [17]2 years ago

8 0

Answer:

never

Step-by-step explanation:

smith will run out by week 2

yKpoI14uk [10]2 years ago

8 0

Answer:

After 17 weeks

Step-by-step explanation:

We can create a system of equations for this problem, where y is the total amount of money in their banks and x is the amount of weeks passed.

Mr. Smith's equation will be $y = 12x+21$ .

Mr. Brown's equation will be $y = 10x+55$ .

We can now solve for x by using substitution.

Let's substitute Mr. Brown's equation into Mr. Smith's equation.

This get us $10x + 55 = 12x + 21$ .

We can now solve for x.

Let's subtract 12x from both sides:

$-2x + 55 = 21$

And now let's subtract 21 from both sides:

$-2x+34=0$

Now we subtract 34 from both sides:

$-2x=-34$

And divide both sides by -2.

$x=17$

Hope this helped!

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Step-by-step explanation:

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A group of pennies made in 2018 are weighed. The mean is approximately 2.5 grams

Hatshy [7]

Answer:

* The mean (a measure of central tendency) weight value is the average of the weights of all pennies in the study.

* The standard deviation (a measure of variability or dispersion) describes the lowest and highest any individual penny weight can be. Subtracting 0.02g from the mean, you get the lowest penny weight in the group.

Step-by-step explanation:

Recall that a penny is a money unit. It is created/produced, just like any other commodity. As a matter of fact, almost all types of money or currency are manufactured; with different materials ranging from paper to solid metals.

A group of pennies made in a certain year are weighed. The variable of interest here is weight of a penny.

The mean weight of all selected pennies is approximately 2.5grams.

The standard deviation of this mean value is 0.02grams.

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Likewise, adding 0.02g to the mean, you get the highest penny weight in the group.

Hence, the weight of each penny in this study, falls within

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