Hello :
y = 3x²+9x
= 3(x² + 3x )
= 3 ( x² +2(3/2)x +(3/2)²) -(3/2)²)
= 3((x+3/2)² -9/4)
y = 3 (x+3/2)² -27/4
<span>the x-coordinate of the vertex is : - 3/2</span>
B- the atmosphere 30,000 years ago was different than our atmosphere today
Answer:
<u>D: 920</u>
Step-by-step explanation:
My reasoning here was simple: 920 is the only option listed that is not divisible by 180.
Hope this helps. Have a great day!
Answer:
well I am going to say A
Step-by-step explanation:
it
just
seems
like
it
makes
more
sense
in
my
head
This is the concept of trigonometry, the height of the ramp will be given by:
sin theta=[opposite]/[hypotenuse]
theta=30
opposite=x
hypotenuse=40 ft
hence;
sin 30=x/40
thus;
x=40sin30
x=20 ft
the ramp is 20 ft high
