Question 6 (multiple choice) janine and wesley sell office chairs. janine earns a base salary of $2800 a month, plus $100 for each chair she sells. wesley earns a base salary of $2400 a month, plus $125 for each chair he sells. how many chairs do janine and wesley have to sell before they earn the same amount of money? a. 16 chairs b. 10 chairs c. 20 chairs d. 25 chairs

Answers:

16 chairs

(:

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

360/29

step-by-step explanation: