Worldwide, there are about 3,000 species of snakes. Of those, about 200 of those species produce venom that causes serious injury, disability, or death to humans. There are 3 times as many vemon-producing snakes in general. How many venomous snakes species there are.

 Venomous snakes distribution and species risk categories ... Venomous snakes occur throughout many regions of the world and are a threat to ... Out of more than 3000 species of snakes in the world, some 600 are venomous and over 200 are ... about antivenom products for treating envenoming caused by their bites.

Step-by-step explanation: I love snakes

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