Is the following a function? each employee's social security number paired with their salary. a.) not enough information is given

b.) yes, because each employee's social security number is unique and will be paired with just one salary

c.) no, because not all employees will have a social security number

d.) no, because more than one employee will be paired with the salary

b.) yes, because each employee's social security number is unique and will be paired with just one salary

Step-by-step explanation:

each employees social security number will be different, but there will be more than one employee with one salary but the employee could be find by the social security number

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15