Question

here are five rods a-1 a a a a+3 all measurements are in cm the total length of the five rods is l cm find a formula for l in terms of a write your formula as simply as possible

Answer 1

Answer:

$I=5a+2$ (simplified form)

Step-by-step explanation:

I is the total length of all the 5 rods.

Each of the 5 parts lengths are $(a-1), a, a, a, (a+3)$, respectively.

We add all of them and equate it to I:

$I=(a-1)+a+a+a+(a+3)$

Simplifying this, we take like terms and add:

$I=(a-1)+a+a+a+(a+3)\\I=5a-1+3\\I=5a+2$