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Vesnalui [34]
3 years ago
7

Factor mn - 4m - 5n + 20

Mathematics
2 answers:
anastassius [24]3 years ago
4 0
Mn - 4m - 5n + 20

In this, mn and -4m have a common factor; m. So we can take that out to make it:

m(n-4) -5n + 20

Now, -5n + 20 also has a common factor which is 5, because 20/5 gives you 4, and 5/5 equals 1. So we can talk out that -5 (it doesn't need to be negative, but negatives on variable, no gusta). So you'd get

m(n-4)-5(n-4)      OR m(n-4)+5(-n+4)
quester [9]3 years ago
3 0

Answer:

We have to factor the expression

=mn-4m-5n+20

=m*(n-4)-5*(n-4)

Taking (n-4), common between these two terms

=(m-5)(n-4)

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3 years ago
X+y=5<br> 2x - y = 1<br><br> Need help
erma4kov [3.2K]

Answer:

y = 3

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Step-by-step explanation:

x+y=5  ==   -2x - 2y = -10

2x-y = 1 ==  2x - y = 1    +

                  -------------------

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