What would the advertised size of a TV be if its length and width are 20 inches by 21 inches?
1 answer:
You might be interested in
Answer:
vertex = (- 1, 3 )
Step-by-step explanation:
Given a parabola in standard form
y = ax² + bx + c ( a ≠ 0 )
Then the x- coordinate of the vertex is
= -
y = 2x² + 4x + 5 ← is in standard form
with a = 2, b = 4, then
= -
= - 1
Substitute x = - 1 into the equation for corresponding value of y, that is
y = 2(- 1)² + 4(- 1) + 5 = 2 - 4 + 5 = 3
vertex = (- 1, 3 )
Answer:
or approximately
units
Step-by-step explanation:
The formula for finding the circumference of a circle is , where
= circumference and
= radius. In this case,
, so after plugging that into
, we get:
Since is approximately
,
, which rounds to
. Therefore, the circumference of the circle is
, or approximately
units. Hope this helps!