The equation which is supposed to help you is this one:
a^2 - b^2 = (a+b) (a-b)
So, what we need to do here is apply this equation:
k^2 - 9h^2 =
k * k - (3h)^2 =
(k + 3h) (k - 3h)
Answer:
P(draw a blue or red marble) =
Step-by-step explanation:
The bag contains 8 blue, 5 green, and 8 red marbles
Total number of marbles is 8 + 5 + 8 = 21
P(draw a blue or red marble) = P(blue marble) or P(red marble)
In probability,"Or" means addition (+)
So, P(draw a blue or red marble) = P(blue marble) + P(red marble)
P(draw a blue or red marble) = + =
P(draw a blue or red marble) =
Answer:
5397.76 m^2
Step-by-step explanation:
We have a rectangle in the middle
The area is
A = l*w
A = 44*88 = 3872
We have 2 semicircles on the ends, which is one circle
the diameter is 44 which means the radius is 44/2 = 22
A = pi r^2
A = 3.14 ( 22)^2
A = 3.14 (484)
A =1519.76
Add the two areas together
A =1519.76+3872=5391.76
X - y = 28 (difference between the two numbers)
and
x - 8 = 2y (8 less than twice the smaller number)
From the first . . . x = 28 + y
28 + y - 8 = 2y
20 = 2y - y
20 = y
x - 20 = 28
x = 28 + 20 = 48