Answer:
12
Step-by-step explanation:
8.x-13=3+4.x
8.x-13=7.x
x-13+8=7.x
x-5=7.x
x-x=7+5
x-x=12
x=12
A tetrahedron is also called a regular triangular pyramid.
option b is the correct answer.
Answer:
i think 5% but not too sure
Step-by-step explanation:
is it right?