Question

Write the expression in standard form: 4(2a) + 7(-4b) + (3 × c × 5).

Answer 1

8a + -28b + 15 x c  

just combine like terms basically.

Answer 2

Answer: $8a-28 b+15c$

Step-by-step explanation:

The given expression : $4(2a) + 7(-4b) + (3 \times c \times 5).$

To write the above expression in standard form , we will simplify each term as

$4(2a)= 4\times2 a = 8a$               (1)

$7(-4b)=7\times-4b= -28 b$           (2)

$(3 \times c \times 5)= 3\times5\times c= 15c$        [using commutative property]         (3)

Using (1) , (2) and (3) , we get

The standard form of the given expression :

$8a-28 b+15c$