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17-02-2022
Mathematics

contestada

Which is an equivalent expression for 21a+35?
Select one:

7(3a+5)

21(a+35)

7(3a+35)

Respuesta :

semsee45 semsee45

17-02-2022

Answer:

7(3a + 5)

Step-by-step explanation:

Rewrite 21 as 7 · 3

Rewrite 35 as 7 · 5

Therefore,

⇒ 21a + 35 = 7 · 3a + 7 · 5

Factor out common term 7:

⇒ 7 · 3a + 7 · 5 = 7(3a + 5)

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