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anyanavicka [17]
3 years ago
8

How is the answer -1? How do I get it?

Mathematics
2 answers:
UNO [17]3 years ago
8 0
When distributing the negative three into the parentheses, that canceled out the -5 and made it a positive 15
Lerok [7]3 years ago
8 0

5x- 3(x-5)=13

5x-3x+15=13

2x=-2

x is  -2

Your mistake is that you forgot to add when you multiply 3 and 5

and negative and negative make positive

hope this helps


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two runners start 30kilometer apart and run toward each other. they meet after 3hours. One Runner runs 2 kilometers per hour fas
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Let the slower runners speed be X kilometers per hour.

Then the faster runners speed would be X+2 kilometers per hour.


The formula for distance is Speed times time.

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Since there are two runners you need to add the both of them together.

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The area of rectangle is ( 30x²y + 20xy ) cm² and its breadth is 10xy cm .Find its length.
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Step-by-step explanation:

1) The area of rectangle is ( 30x²y + 20xy ) cm² and its breadth is 10xy cm .Find its length....

= Solution ,

Length ( L ) = ?

breadth ( b ) = 10xy cm

area ( a ) = ( 30x² + 20xy )

Now ,

area ( a ) = l × b

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or,\frac{30 {xy + 20xy}^{2} }{10xy}  = l \\

or, \: l = 3 {x}^{2 - 1}  + 2cm

\boxed{\sf{l = (3x+2)cm}}

2) Subtract the quotient when 20x⁴y² is divided by 5x³y from the product of 2x and 3y.

= Solution,

= \frac{20 {x}^{4} {y}^{2}  }{5 {x}^{3} y}   \\

= 4xy

The product of 3x and 4y = 6xy

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= \boxed{\sf {2xy}}

hope it helped !!!!

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