Andy has three planks of wood. Two planks are each 1.5 m long. One plank is 2.5m long. What is the total length of all the three planks?

Given:

Two planks are each 1.5 m long.

One plank is 2.5m long.

To find:

The total length of all the three planks.

Solution:

Two planks are each 1.5 m long. So,

First plank = 1.5 m

Second plank = 1.5 m

One plank is 2.5m long. So,

Third plank = 2.5 m

Now, the total length of all the three planks is

Therefore, the total length of all the three planks is 5.5 m.

Written in standard form, which just means organizing your terms by degree (degree being the exponent, and constants being last):

-3x² + 5x + 2

so, with this, you can see that the first/leading coefficient is -3 and your constant is 2