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Marina86 [1]
3 years ago
8

What is the discriminant of 9x2 + 2 = 10x? –356 –172 28 72

Mathematics
2 answers:
Airida [17]3 years ago
7 0

Answer:

<h2><em>C. 28</em></h2>

Step-by-step explanation:

Iteru [2.4K]3 years ago
5 0

Answer:

its C on edg

Step-by-step explanation:

follow my ifunny "dankmemehistory"

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Answer:

what does lmno means

Step-by-step explanation:

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3 years ago
12 subtracted from a number equals 25 find the number
belka [17]

Answer: 12-n=25

-n=25-12

-n=13

Step-by-step explanation:

6 0
3 years ago
A rectangular package sent by a postal service can have a maximum combined length and girth (perimeter of a cross sectio) of 108
Morgarella [4.7K]

Answer:

The maximum volume of the package is obtained with a cross section of side 18 inches and a length of 36 inches.

Step-by-step explanation:

This is a optimization with restrictions problem.

The restriction is that the perimeter of the square cross section plus the length is equal to 108 inches (as we will maximize the volume, we wil use the maximum of length and cross section perimeter).

This restriction can be expressed as:

4x+L=108

being x: the side of the square of the cross section and L: length of the package.

The volume, that we want to maximize, is:

V=x^2L

If we express L in function of x using the restriction equation, we get:

4x+L=108\\\\L=108-4x

We replace L in the volume formula and we get

V=x^2L=x^2*(108-4x)=-4x^3+108x^2

To maximize the volume we derive and equal to 0

\dfrac{dV}{dx}=-4*3x^2+108*2x=0\\\\\\-12x^2+216x=0\\\\-12x+216=0\\\\12x=216\\\\x=216/12=18

We can replace x to calculate L:

L=108-4x=108-4*18=108-72=36

The maximum volume of the package is obtained with a cross section of side 18 inches and a length of 36 inches.

4 0
3 years ago
Read 2 more answers
How much is a 15-percent down payment on a purchase price of $205,000
Jet001 [13]
An item that costs $205000, when discounted 15 percent, will cost $174250. The easiest way of calculating discount is, in this case, to multiply the normal price $205000 by 15 then divide it by one hundred. So, the discount is equal to $30750. To calculate the sales price, simply deduct the discount of $30750 from the original price $205000 then get $174250 as the sales price. which mean is C
3 0
3 years ago
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If i am dtiving 8 miles at 55 miles per hour how long willnit take
anyanavicka [17]

Answer:

It takes 0.145 hours

Step-by-step explanation:

Given:

Distance  = 8 miles

Speed = 55 miles per hour

To Find:

Time taken = ?

Solution:

The time taken for an object to travel a particular distance  with  a  average speed can be found by

\text{Time Taken} = \frac{distance}{ speed}

Now Substituting the given values , we get

\text{Time Taken} = \frac{8}{55}

\text{Time Taken} = 0.145

Time taken will be 0.145 hours

3 0
3 years ago
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