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the help video did not help what do i put in the blank boxes u get a lot of points from this also plz actually anwser don't put "idk" (yes that has happened)

the help video did not help what do i put in the blank boxes u get a lot of points from this also plz actually anwser dont put idk yes that has happened class=

Respuesta :

Estellia

Answer:

Basically, this is trying to say that

[tex]a(b+c)=ab+ac[/tex].

15 can be split up into 10 and 5.

And multiplying 3 by 15 is the same as the sum of multiplying 3 by 10 and 3 by 5.

[tex]3*10=30[/tex] (First Box)

[tex]3*5=15[/tex] (Second Box)

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[tex]30+15=45[/tex]

[tex]3*15=45[/tex]

(Proof that it works)

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