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krok68 [10]
3 years ago
13

The answer and how to solve it

Mathematics
1 answer:
blondinia [14]3 years ago
3 0
U would simpiphy it to then get the awnser
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Which operation will cancel out division?
emmasim [6.3K]

Answer:

The operation that will cancel out division is multiplication.

Step-by-step explanation:

For example:

\frac{2+5x}{2} \\

*in order to solve for x, and get the upper equation without division, you must multiply by the negative reciprocal*

2*(\frac{2+5x}2} )

4+10x\\

*to get x alone, we must subtract 4 from both sides*

10x = -4\\\\-4 / 10 = - 2/5

x=- 2/5

8 0
3 years ago
The total cost of 4 starfish was $7.20. Write and solve an equation to find how much one starfish cost.
Lyrx [107]

Answer:

$1.80

Step-by-step explanation:

4x = 7.20

x = 1.80

7 0
3 years ago
Manuel bought a balloon (that is a perfect sphere) with a radius of 2 cm. He wanted his balloon to be bigger, so he blew 2 big b
horsena [70]
What is the question asking?
5 0
3 years ago
Read 2 more answers
A tire dealer sells 2 tires for as much as he paid for 3 tires. he paid $240 for a dozen tires. What is the total profit on 12 t
tester [92]
First, find how much he paid by tire.
To do so, divide what he paid by how many tires he bought like this :
240$ / 12 = 20$ per tire

Then, calculate how much he sells each tire.
To do so, start by calculating how much he paid for 3 tires:
20$ x 3 = 60$

This is the price he sells 2 tires for, therefore :
60$ / 2 = 30$
he sells his tires 30$ each.

Finally, you have to calculate the profit he made by selling 12.
We already know how much it cost, so you need to find how much money he gets selling them :
12 tires x 30$ = 360$

To find the profit, take off the amount he paid from the amount he made :
360$ - 240$ = 120$

There you go!
3 0
3 years ago
Find the domain of f(x)=x-9/x squared-81
vagabundo [1.1K]

f(x)=\dfrac{x-9}{x^2-81}\\\\\text{The domain:}\\\\x^2-81\neq0\qquad\text{add 81 to both sides}\\\\x^2\neq81\to x\neq\pm\sqrt{81}\\\\x\neq-9\ \wedge\ x\neq9\\\\Answer:\ \boxed{\text{All real numbers except -9 and 9}}\to\boxed{x\in\mathbb{R}-\{-9,\ 9\}}

7 0
3 years ago
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