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

18

Step-by-step explanation:

3 x( 1x2) = 6 plus...

2 x 2 x 3 =12

so 6 plus 12 is 18

y =18

Step-by-step explanation:

y = 3 × 1 ×2 + 2 ×2× 3

y = 6 + 12

y = 18

To find the value of the underlined digit (in this case 3), you will be looking at its "spot." For example, 5 is in the ones spot, 3 in the tens spot, 0 in the hundreds spot, and 6 in the thousands spot. In each of these spots (starting right to left), you simply add one zero at the end. Since 5 is in the ones spot, there is no 0. Next, 3 will become 30, 0 will become 000 (although its value remains 0), and 6 will become 6000. So, the value of 3 is 30.