Marcel bought a Rubik's™ puzzle in the shape of a triangular pyramid. The base is an equilateral triangle with sides of 3 inches and a height of
2.6 inches. The height of the puzzle is 2.1 inches. What is the volume of
this puzzle to the nearest tenth of a cubic inch?​

$450

step-by-step explanation:

first, you have to multiply 150x2=300

next, you have to add 150+300= 450

step-by-step explanation:

first, eliminate the parenthesis:

3

x

+

2

−

4

x

second, group like terms:

3

x

−

4

x

+

2

third, combine like terms:

(

3

−

4

)

x

+

2

→

−

1

x

+

2

→

−

x

+

2