Answer:
77.
Proved
78.
Proved
79.
Proved.
80.
Proved.
Step-by-step explanation:
77. Left hand side
=
=
=
{Since we know,
}
=
= Right hand side (Proved)
78. Left hand side
=
=
{Since
}
=
= Right hand side (Proved)
79. Left hand side
=
=
{Since
}
=
= Right hand side
80. Left hand side
=
=
{Since
}
=
=
= Right hand side. (Proved)
Answer:
Circumference: 37.68
Area: 113.04
Step-by-step explanation:
the formula to find the circumference is 2 x 3.14 x r
r is the radius so you plug in 6 for that
2 x 3.14 x 6 = 37.68
the formula to find the area of a circle is 3.14 x r ²
r is still the radius so you plug in 6 for that
3.14 x 6² = 113.04
Y=15x for the first and answer C for the second
Answer:
volume= area×height /2
( it's like a half a cuboid)
area=6sq inc
Answer: 
Step-by-step explanation:

Hope this helps, now you know the answer and how to do it. HAVE A BLESSED AND WONDERFUL DAY! As well as a great Valentines Day! :-)
- Cutiepatutie ☺❀❤