Xian & his cousin kia both collect stamps. xian has 56 stamps, & kia has 80 stamps. the boys recently joined different stamp-collecting clubs. xian’s club will send him 12 new stamps per month. kia’s club will send him 8 new stamps per month. after how many months will xian & kia have the same number of stamps? how many stamps will each have?

Xian = 3 months and 1 month for Kia.

Step-by-step explanation:

56 + 12 + 12 + 12 = 91

80 + 12 = 92

They will each have 92 stamps.

what golf ball

step-by-step explanation:

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