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Feliz [49]
2 years ago
15

Help find X:_,_ Y:_,_

Mathematics
1 answer:
Ne4ueva [31]2 years ago
7 0
Use desmos it’s easy
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Solve the equation identify extraneous solutions
PIT_PIT [208]

Answer:

Step-by-step explanation:

The goal to solving any equation is to have x = {something}.  That means we need to get the x out from underneath that radical.  It's a square root, so we can "undo" it by squaring.  Square both sides because this is an equation.  Squaring both sides gives you

x^2=-3x+40

Get everything on one side of the equals sign and set the quadratic equal to 0:

x^2+3x-40=0

Throw this into the quadratic formula to get that the solutions are x = 5 and -8.  We need to see if only one works, both work, or neither work in the original equation.

Does 5=\sqrt{-3(5)+40}?

5=\sqrt{-15+40} and

5=\sqrt{25}

and 5 = 5.  So 5 works.  Let's try -8 now:

-8=\sqrt{-3(-8)+40} and

-8=\sqrt{24+40} so

-8=\sqrt{64}

-8 = 8?  No it doesn't.  So only 5 works. Your choice is the third one down.

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3 years ago
Last year, your salary was $33,975. This year, your boss tells you your salary will be $34,960. What percent raise (change) did
Pavlova-9 [17]

Answer:

2.9%

Step-by-step explanation:

5 0
3 years ago
Please answer this correctly without making mistakes
Pavlova-9 [17]

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This is what internet says. Maybe this helps.

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A. The following events are mutually exclusive: Living in California and watching American Idol. True or False b. The number of
BlackZzzverrR [31]

Answer:

a) False. Because you can live in California AND watch American Idol at the same time

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c) False. The actual probability should become closer to the theoretical probablity

d) True

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The sales tax rate is 3%. If Tanvi buys a balance beam priced at $648, how much tax will she pay?
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She will pay $19.44

I asked Siri, "what is 3% of $648"
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