Snail D can travel 6 inches in half an hr (or 30 minutes)
Step-by-step explanation:
Age of dave = y
Age of Julia = x
y = 4x - 8
if y = 16
then
4x - 8 = 16
4x = 16 + 8
4x = 24
x = 24/4
x = 6
Julia is 6 years old
we know that
<u>Alternate interior angles</u> are two interior angles which lie on different parallel lines and on opposite sides of a transversal. Alternate interior angles are congruent.
so
m∠3=m∠6 -------> by alternate interior angles
therefore
<u>the answer is the option</u>
Alternate interior angles
X - the number
you double the number - 2x
you subtract the result from five - 5-2x
you get negative one - 5-2x=-1

The number is 3.