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Aleks04 [339]
3 years ago
15

A $150 bicycle is on sale at a 20% discount. If there is a 5% sales tax, how much does the bicycle cost in all?

Mathematics
1 answer:
Alex777 [14]3 years ago
3 0
$126 because you have to multiply the $150 by 0.2 then subtract that from 150 then you multiply that by 1.05 for the sales tax. Then you get $126! 
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Answer:

Step-by-step explanation:

We have the equations

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A = x^2 + √3y/2* y/2

A = x^2  + √3y^2/4

From the first equation x = (18 - 3y)/4

So substituting in the area equation:

A = [ (18 - 3y)/4]^2 + √3y^2/4

A = (18 - 3y)^2 / 16 + √3y^2/4

Now for maximum / minimum area the derivative = 0 so we have

A' = 1/16 * 2(18 - 3y) * -3 + 1/4 * 2√3 y = 0

-3/8 (18 - 3y) + √3 y /2 = 0

-27/4 + 9y/8 + √3y /2 = 0

-54 + 9y + 4√3y = 0

y = 54 / 15.93

= 3.39 metres

So x = (18-3(3.39) / 4 = 1.96.

This is a minimum value for x.

So the total length of wire the square  for minimum  total area is 4 * 1.96

= 7.84 m

There is no maximum area as the equation for the total area is a quadratic with a positive leading coefficient.

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3 years ago
A storage closet holds twelve boxes stacked upon each other, with each box being 10 inches high. How many feet are there between
Vikentia [17]

Answer:5

Step-by-step explanation:there are 6 boxes between the top of the 3rd box and the bottom of the 10th box.

Since each box is 10 inches tall, the length of the 6 boxes sum up to 60 inches.

and since 12 inches =1 feet,

Then 60 inches = 5 feet

How to solve

Let "y" = the unknown number of feet's

12 inches = 1 feet

60 inches = y

Cross multiply

> 12×y =60×1

> 12y =60

Divide both sides by 12 since you want the value of "y".

> 12y÷12=60÷12

So 12 cancels out leaving the final answer to be:

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6 0
3 years ago
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luda_lava [24]

Answer:

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Step-by-step explanation:

7 0
3 years ago
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Lubov Fominskaja [6]

Answer:

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what's up? the answer to this is 339+340+341

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