Answer:
[tex]C. 7(4 + 5)[/tex]
Step-by-step explanation:
we have
[tex]28+35[/tex]
we know that [tex]28=7*4[/tex]
and that [tex]35=7*5[/tex]
so the number 7 is their greatest common factor, thus instead of [tex]28 + 35[/tex] we can write the following:
[tex]7*8+7*5[/tex]
and taking the common factor out:
[tex]7(4+5)[/tex]
we get that the answer that is the product of the greatest common factor (7) and the sum of two whole numers (4+5) is opction C.