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Fittoniya [83]
3 years ago
7

If (x2 – 4) = (x + 2) = x -2, which polynomial should fill in the blank below?

Mathematics
1 answer:
Hitman42 [59]3 years ago
4 0

Step-by-step explanation:

use the identity a²-b²=(a-b)(a+b)

x²-4=(x-2)(x+2)

so the answer is x-2

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Expression for 1 box of popcorn $3.50 and 3 drinks $4.50
tigry1 [53]

Answer:

$3.50 + 3·$4.50

Step-by-step explanation:

The total amount of any purchase is computed as the sum of products of quantity and price.

_____

In some instances is is helpful to keep the units (dollars) with the numbers they apply to. Most times, the units will be left off, and you're expected to make sure they work out properly some other way.

5 0
3 years ago
Each cone of the hourglass has a height of 12 millimeters. The total height of the sand within the top portion of the hourglass
Ratling [72]

The solution would be like this for this specific problem:

Volume of a cylinder = pi * r^2 * h 

Volume of a cone = 1/3 * pi * r^2 * h 

Total Height = 47

Height of the cone = 12

Height of the cylinder = 35

If the top half is filled with sand, then:

volume (sand) = pi * 4^2 * 36

volume (cone) =  1/3 * pi * 4^2 * 12

Total volume = 1960.353816 cubic millimeters

353816 / (10 * pi) = 62.4 seconds.

It will take 62.4 seconds until all of the sand has dripped to the bottom of the hourglass.

8 0
3 years ago
some friends went to a local movie theater and bought four large buckets of popcorn and six boxes of candy.The total for the sna
WARRIOR [948]

The total of 2 buckets of popcorn and 3 boxes of candy would be $23.25

To answer this question you need to form a set of simultaneous equations and solve them. We can do this by saying that a bucket of popcorn = P, and a box of candy = C. Then we can say:

4P + 6C = 46.50

P + C = 9.75

There are then two possible ways to solve; you can either say that C = 9.75 - P using the second equation and then substitute it into the first, or you can multiply the second equation by either 4 or 6 to cancel out P or C.

I’m going to multiply the second equation by 4:

4P + 4C = 39

Now we can subtract this for, the first equation:

4P + 6C = 46.50

4P + 4C = 39

2C = 7.50

C = 3.75

Now we can substitute this value of C into one of the equations to find P:

P + C = 9.75

P + 3.75 = 9.75

P = 6

And now to answer the question, you just multiply P by 2 and C by 3 and add them together, which gives you $23.25

I hope this helps! Let me know if you have any questions :)

6 0
3 years ago
Solve 2,401 = 76 – 2x.
Oduvanchick [21]
Subtract 76 on both sides:

2401 - 76 = 76 - 2x - 76 

2325 = -2x

Divide both sides by -2:

-1162.5 = x
4 0
3 years ago
Read 2 more answers
How do I solve:<br><br>6x^2 -x-12=0<br><br>^2 means squared by the way!
kompoz [17]
X=3/2 or 1/2 I think that
4 0
3 years ago
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