The ratio of boys to girls in a class is 1: 2. if there are 51 students in the class, how many boys are there?

17

Step-by-step explanation:

The ratio of boys to girls is 1:2

The total ratio of students in the class is 1+2 = 3

Since there are 51 students in the class therefore, the number of boys in the class is 1/3 × 51

= 17

step-by-step explanation:

y = | -2(-2) |     →     y = | 4 |     →     y = 4       ⇒   (-2, 4)

y = | -2(-1) |     →     y = | 2 |     →       y =   2       ⇒   (-1, 2)    

y = | -2(0) |     →     y = | 0 |     →       y = 0         ⇒   (0, 0)

y = | -2(1) |   c →     y = | -2 |     →     y =   2         ⇒   (1, 2)    

y = | -2(2) |     →     y = | - 4 |     →     y =   4         ⇒   (2, 4)