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Juli2301 [7.4K]
3 years ago
6

Answer this please.!

Mathematics
1 answer:
N76 [4]3 years ago
5 0

I cant see it too small

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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.

6 0
3 years ago
True or false just answer like that pls
sveta [45]

Answer:

false

false

true

false

true

Step-by-step explanation:

brainliest?

3 0
2 years ago
HELLO<br><br> HELP<br><br> THANKS<br><br> BYE
seropon [69]
C) 5.5 thats what I got.
3 0
3 years ago
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What is the domain of function of f(x)=-2x+4x
dem82 [27]

Answer:

Domain= x∉Real numbers

Step-by-step explanation:

4 0
3 years ago
If a watermelon weighs 6 255 grams and a scales measures the weight 6 475 grams. What is the scales percent error
Liono4ka [1.6K]

Answer:scales percent error=3.51%

Step-by-step explanation:

P ercent error = Experimental value - Theoretical value /Theoretical value  x 100

Theoretical value = 6255 grams

Experimental value ( use of scale ) = 6475grams

Percent error =(6475- 6255)grams / 6255grams x 100

=220/6255 x 100

=3.51%

6 0
3 years ago
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