Evie was doing a science fair project by surveying 30 students. 15 had brown hair and 17 had blue eyes and 6 had neither brown hair nor blue eyes. determine the number of students who had brown hair and blue eyes.

8 students

Step-by-step explanation:

Let x be the number of students which had brown hair and blue eyes. Then

Hence,

30-((15-x)+x+(17-x)) students had neither brown hair nor blue eyes.

The number of students who had brown hair and blue eyes = 8

Step-by-step explanation:

It is given that,There are total 30 students.

15 had brown hair and 17 had blue eyes and 6 had neither brown hair nor blue eyes.

From the given information we get,

The number students in which either brown hair or blue eyes or both is given by =   30 - 6 = 24

Let x students had brown hair  and y students had blue eyes

x∩y = the number of students who had brown hair and blue eyes

x = 15 and y = 17

we can write

24 = x + y - x∩y

x∩y = x + y -24 = 15 + 17 - 24

x∩y = 8

Therefore  the number of students who had brown hair and blue eyes = 8

idk i would have to be there to under stand it

step-by-step explanation:

idk i would have to be there to under stand it

a) y = -3x +2

b) y = 1/2x -6

these 2 can be combined into one equation.

-3x +2 = .5x -6

8 = 3.5x

x = 8 / 3.5 = 2.2857142857

y = -3 * (8 / 3.5) +2

y = (-24 / 3.5) + 2

y = -4.8571428571

step-by-step explanation: