Highest common factor of 12 and 18

12

3 4

 2 2

3 x 2x 2

18

9 2

3 3

2 x 3 x3

= 6

6

Step-by-step explanation:

12 = 4 * 3 = 2 *2 * 3

18 = 2 * 9 = 2*3 *3

Highest common factor = 2 * 3 = 6

the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is

answer: 10 turtles

step-by-step explanation: as turtles have four legs so 4.10=40 therefore birds are 4 which sue counted