1/21 * 1/20 = 1/420 that is the probability that you are chosen first.
Probability of your friend chosen first = 1/420 also.
So the required probability = 1/420 + 1/420 = 1/210 Answer
Its D
45 x 5 = 225 minutes per week
225 x 36 = 8,100 minutes per school year
Answer:
0.375
Step-by-step explanation:
Answer:
y = -1x + 2
Step-by-step explanation:
We need to find y = mx + b
Use the following equation

Plug in the values
= 
We have found the slope(m) which is -1
We have to find y-int b
Plug in any given x,y into the slope formula
-1 = -1(3) + b
-1 = -3 + b
2 = b
At last the formula is
y = -1x + 2
2x^2-15=x
2x^2-x-15=0
(X-3)(2x-5)=0
x-3=0 or 2x-5=0
X=3 2x=5
x=5/2=2.5