An Earring design is shaped like a triangular pyramid. All the faces are equilateral triangles with side lengths of 14 mm. The slant height is 12.1 mm. What is the surface area of the earring ?

you need to show us the graph.

step-by-step explanation:

9 x 8 divided by (5-3)=36

answer: 12

step-by-step explanation:

because yes

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