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egoroff_w [7]
3 years ago
9

Squaring both sides of an equation is irreversible. Is Cubing both sides of an equation reversible? Provide numerical examples t

o help support your answer.
Mathematics
1 answer:
nikitadnepr [17]3 years ago
4 0

Answer:

<h2>Cubing both sides of an equation is reversible.</h2>

Step-by-step explanation:

Squaring both sides of an equation is irreversible, because the square power of negative number gives a positive result, but you can't have a negative base with a positive number, given that the square root of a negative number doesn't exist for real numbers.

In case of cubic powers, this action is reversible, because the cubic root of a negative number is also a negative number. For example

\sqrt[3]{x} =-1

We cube both sides

(\sqrt[3]{x} )^{3} =(-1)^{3} \\x=-1

If we want to reverse the equation to the beginning, we can do it, using a cubic root on each side

\sqrt[3]{x}=\sqrt[3]{-1} \\\sqrt[3]{x}=-1

There you have it, cubing both sides of an equation is reversible.

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Guys please help (7thgrademath) both of the ones 1-10
Alex787 [66]

Hello!

Answer:

1. first u want to distribute the 3

3(n+4)+2

3n+12+2

Then add 12 and 2

3n+14

2. again, distribute

5(w+2)+3w-4

5w+10+3w-4

subtract

5w+10-4+3w-4-4

combine like terms

5w+3w+6+3w+3w

8w+6

3. distribute

3(w-2y)+w+4

3w-6y+w+4

Combine like terms

4w-6y+4

these are the first 3. if this is not what you wanted pls reach out! Hop this helps! :)

6 0
3 years ago
Read 2 more answers
What is the quotient? 40,561 divided by 47
kumpel [21]
40,561÷ 47= 863

Hoped this helped.

~Bob Ross®
6 0
4 years ago
A shirt is $25.99 if the sales tax is 8.5% what will be the total cost of the shirt? Please help:)
tankabanditka [31]
Total=shirtcost+tax
shirtcost=100%
8.5%+100%=108.5%=1.085

1.085 times 25.99=28.19915
round
total cost is
$28.20
7 0
4 years ago
Read 2 more answers
Use the equation k = x÷ y to find the constant of proportionality for the set of values
Lubov Fominskaja [6]

The constant of proportionality is 1/3

and three more values are

x       1        2        3        4        5        

y       3       6        9        12       15

<h3>Variation</h3>

From the question, we are to determine the constant of proportionality

The given equation is

k = x ÷ y

From the given information,

When x = 1, y = 3

∴ k = 1 ÷ 3

k = 1/3

Thus, the constant of proportionality is 1/3

Now, we will determine the values of y for the values x = 3, x = 4, and x = 5

Since

k = x ÷ y

Then,

y = x ÷ k

When x = 3

y = 3 ÷ 1/3

y = 3 × 3

y = 9

When x = 4

y = 4 ÷ 1/3

y = 4 × 3

y = 12

When x = 5

y = 5 ÷ 1/3

y = 5 × 3

y = 15

Hence, the constant of proportionality is 1/3

and three more values are

x       1        2        3        4        5        

y       3       6        9        12        15

Learn more on Variation here: brainly.com/question/19641181

#SPJ1

3 0
3 years ago
(20pts) Prove that the product of any two odd numbers is always odd. Make sure to explain your proof​
kozerog [31]

Answer:

See below (I hope this helps!)

Step-by-step explanation:

Because odd numbers are always 1 greater than even numbers, we can call the two odd numbers x + 1 and y + 1 where x and y are even integers. Multiplying the two gives us:

(x + 1) * (y + 1)

= x * y + x * 1 + 1 * y + 1 * 1

= xy + x + y + 1

We know that x * y will be even because x and y are also even and the sum of two even numbers will be even, and we also know that x and y are even and that 1 is odd. Since the sum of even and odd numbers is always odd, the product of any two numbers is always odd.

*NOTE: I put a limitation on x and y in my proof (the limitation was that x and y must be EVEN integers) but you don't have to do that, you could make the odd integers 2x + 1 and 2y + 1 where x and y could be any integer from the set Z like mirai123 did. I simply gave this proof because it was the first thing that came to mind. While mirai123's proof and mine are different, they are still both correct.

5 0
3 years ago
Read 2 more answers
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