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Anika [276]
3 years ago
15

the length of a rectangle is 7 cm less than its width what are the possible dimensions of the rectangle if its area is 120 squar

e centimeters

Mathematics
1 answer:
horsena [70]3 years ago
5 0

Width is 15 cm.

Refer to the image for details.

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How do you solve this problem?
belka [17]

Answer:

You solve this problem

Step-by-step explanation:

Fire and sun light

4 0
3 years ago
Communicate Mathematical Ideas Irrational numbers can never be precisely represented in decimal form. Why is this? 20 Unit1
kiruha [24]

Answer:

An irrational number can never be represented precisely in decimal form.

Step-by-step explanation:

<em>A number can be precisely represented in decimal form if you can give a rule for the construction of its decimal part,</em>

for example:

2.246973973973973... (an infinite tail of 973's repeated over and over)

7.35 (a tail of zeroes)

If this the case, then the number is a RATIONAL NUMBER, i.e, the QUOTIENT OF TWO INTEGERS.

Let's show this for the first example and then a way to show the general situation will arise naturally.

Suppose N = 2.246973973973...

You can always multiply by a suitable power of 10 until you get a number with only the repeated chain in the tail

for example:

1) N.10^3=2246.973973973...

but also

2) N.10^6=2246973.973973...

Subtracting 1) from 2) we get

N.10^6-N.10^3=2246973.973973973... - 2246.973973973...

Now, the infinite tail disappears

N.10^6-N.10^3=2246973 - 2246=226747

But  

N.10^6-N.10^3=N.(10^6-10^3)=N.(1000000-1000)=999000.N

We have then

999000.N=226747

and

N=\frac{226747}{999000}

We do not need to simplify this fraction, because we only wanted to show that N is a quotient of two integers.

We arrive then to the following conclusion:

If an irrational number could be represented precisely in decimal form, then it would have to be the quotient  of two integers, which is a contradiction.

So, an irrational number can never be represented precisely in decimal form.

6 0
3 years ago
There are 18 apples on the tree in the Donaldson's front yard.
azamat
13 out of 18 are left
6 0
3 years ago
Read 2 more answers
Subtract <br><br> \frac{3n+2}{n-4}-\frac{n-6}{n+4}
aalyn [17]
(3n+2)/(n-4) - (n-6)/(n+4)

common denominator (n-4)(n+4)

{(n+4)(3n+2)-(n-4)(n-6)}/{(n-4)(n+4)}

Use the foil method:

{(3n²+14n+8)-(n²-10n+24)}/{(n-4)(n+4)}

distribute negative sign:

{(3n²+14n+8-n²+10n-24)}/{(n-4)(n+4)}

subtract:

(2n²+24n-16)/{(n-4)(n+4)}

take out 2:

2{n²+12n-8}/{(n-4)(n+4)}

 
4 0
3 years ago
Read 2 more answers
Giving brainliest whoever answers this question first, please help
vladimir2022 [97]
The question is there
6 0
2 years ago
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