C and D both have variables because u don’t know what the x stands for
( I hope this helped)
Answer:
Height = 5 ft
Short base = 10 ft
Long base = 14 ft
Step-by-step explanation:
Let h = height, a = short base, b = long base.
From the question,
a = 2h
b = a + 4 = 2h + 4
The area of the trapezoid is given by
. Thus,







or 
or 
We discard the negative value of h since it is a measurement and cannot be negative.

Answer:
A
Step-by-step explanation:
Since F(x) is opening downwards the x component must be multiplied by a - number. The number in the parentheses represents horizontal movement, but it must be remember that if negative it moves right and if positive it moves left. The number outside the parentheses represents represents vertical movement and is more intuitive, where positive is up and negative is down. Keeping this in mind it should be A
Quadratic formula where:



do both do get the roots of the equation
Answer:
C(x) = 25 + 2x
Step-by-step explanation:
He already has 25 cards.
He is collecting 2 cards per month. In x months, he will have collected:
2 * x = 2x cards
That means that the number of cards he will have after x months will be the sum of the cards he already has and the cards he collects per month:
C(x) = 25 + 2x