Which operation can be used with the augmented matrix below? Switch column 1 and column 2.
Multiply row 3 by 0.
Add row 2 and column 3.
Multiply row 2 by –1 and add it to row 3.

is there a question here?

step-by-step explanation:

168

step-by-step explanation:

first off, we know that he drove 3.5 hours at a rate of 48 mph.

knowing that, we want to see how many miles he drove all-together.

in this case, we can just multiply 48 by 3.5.

48 * 3.5 = 168