Question

If y = 3ab + 2b3, what is y when a = 1 and b = 2

Answer 1

Answer:

$\large\boxed{y=22}$

Step-by-step explanation:

In this question, we're trying to find what y equals to when a = 1 and b = 2.

This means that we would be plugging in the numbers to its appropriate variable.

You would plug 1 in a and 2 in b.

Your equation should look like this:

$y=3(1)(2)+2(2)^3$

Now, we will solve:

$y=3(1)(2)+2(2)^3\\\\y=3(2)+2(2)^3\\\\y=6+2(2)^3\\\\(2)^3 \,\text{is the same as}\,\, 2*2*2\\\\y=6+2(8)\\\\y=6+16\\\\y=22$

When you're done solving, you should get y = 22

This means that y = 22

I hope this helped you out.

Good luck on your academics.

Have a fantastic day!