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3 years ago

Simplify: (7y2 + + 3xy - 9) - (2y2 + 3xy - 5)

Mathematics

1 answer:

yulyashka [42]3 years ago

4 0

Answer:

$\huge\boxed{\sf 5y^2 -4}$

Step-by-step explanation:

$\sf (7y^2 + 3xy -9) - (2y^2+3xy-5)\\\\Resolving \ Parenthesis\\\\7y^2 + 3xy-9 -2y^2 -2xy+5\\\\Combining \ like \ terms\\\\7y^2-2y^2+3xy-3xy-9+5\\\\Adding \ or \ Subtracting\\\\\boxed{\bold{\sf 5y^2-4}}$

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Geet sells televisions. He earns a fixed amount for each television and an additional $ 30 if the buyer gets an extended warrant

pashok25 [27]

Answer:

The fixed amount Geet earns for each television is $60.

Step-by-step explanation:

Given:

Geet sells televisions. He earns a fixed amount for each television and an additional $ 30 if the buyer gets an extended warranty.

If Geet sells 17 televisions with extended warranties, he earns $ 1,530.

Now, to find the fixed amount Geet earns for each television.

Let the cost of fixed amount be $x$ .

Number of television = 17.

He earns total = $1,530.

He earns additional amount = $30.

Now, to get the fixed amount we put an equation:

$17(x+30)=1530$

$17x+510=1530$

Subtracting both sides by 510 we get:

$17x=1020$

Dividing both sides by 17 we get:

$x=60.$

Therefore, the fixed amount Geet earns for each television is $60.

7 0

3 years ago

Jonathan's Antiques purchased an old wooden sled at an auction for $210. Jonathan wants to mark up the sled 60% of the selling p

Elis [28]

Well, if the selling price was 210, and that's the 100%, then if he adds 60% to that, the new price will be 160% of 210... well, if 210 is the 100%, what's 160% of that?

$\bf \begin{array}{ccllll}
amount&\%\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
210&100\\
x&160
\end{array}\implies \cfrac{210}{x}=\cfrac{100}{160}$

solve for "x".

4 0

3 years ago

PLEASE help with 5-6 :)))))

zloy xaker [14]

Ans.5) you can re-write 3 3/10 as 33/10

Now, you have to find two numbers whose sum would be 33/10.

Try to fix the denominator, and change numerator...like

it would be 13/10 + 20/10 or 15/10 + 18/10.Ok..

You can do your 6th ques. in same manner.

Did you understand?Or not??

8 0

3 years ago