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2 years ago

Devin invested money into a bank account. The table below is the value of Devin’s investment over time.

Mathematics

1 answer:

shtirl [24]2 years ago

6 0

This data best fits an exponential model.

The regression equation would be:
y = 8385(1.12)^x (There are online calculators for this)

The y-intercept would be the starting value of the account.

Yes, the correlation coefficient is 0.9983.

If you input 6 into the equation, you will get a value of $16,550.

Guest

1 year ago

Can you show your work for the input of 6??

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Using V = lwh , find an expression in factored form for the volume of this prism. Explain the general steps you used to arrive a

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Using the given equation of,
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2 years ago

Carlos shovels snow from driveways in his neighborhood. he charges $10 for each regular driveway and he charges an extra $7.50 f

stiks02 [169]

Let, the number of regular driveways be x.

Given there are 3 fewer large driveways than regular driveways.

So, the number of large driveways = $(x-3)$

Given, Carlas charges $10 for each regular driveway.

So for x regular driveway the amount will be = $ $(10)(x)$ = $ $(10x)$

And he charges extra $7.50 for each large driveway.

So for each large driveway Carlos charges = $ $(10+7.50)$ = $17.50.

For (x-3) large driveways Carlos will charge = $ $(17.50)(x-3)$ = $ $(17.50x - 52.50)$

Given, the total amount he makes = $140

So we can write the equation as,

$10x + 17.50x - 52.50 = 140$

$27.50x + 52.50 = 140$

We will move 52.50 to the right side by adding it to both sides. We will get,

$27.50x - 52.50 + 52.50 = 140 + 52.50$

$27.50x = 192.50$

Now to get x, we will move 27.50 to the right side by dividing it to both sides. We will get,

$\frac{(27.50x)}{27.50} =\frac{192.50}{27.50}$

$x =\frac{192.50}{52.50}$

$x = 7$

So we have got the required answer.

The number of regular driveways Carlos shovel = 7.

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2 years ago

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2 years ago

A refund of $3.15 on a $8.64 bill

Varvara68 [4.7K]

8.64 - 3.15 = $5.49 if this is what you are asking

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