What's the Volume of this??

V = 90 cm^3

Step-by-step explanation:

The volume is given by

V = Bh

where B is the area of the base and  h is the height

The base is the two sides that are identical, which is the triangle

B = 1/2 bh

   = 1/2 (4*3)

   = 1/2 (12)

   = 6

Substituting into the volume equation, where h = 15

V = 6*15

V = 90 cm^3

relating to or denoting a system of numbers and arithmetic based on the number ten, tenth parts, and powers of ten.

it alot will look like this 4.4

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