Step-by-step explanation:
Total = n, Blue = 1 Red = n-1
(a)The prob. that two bags are blue and red each = prob. of blue and the prob. of red =1/n × n-1/n =n-1/n^2
(b)
A. 2 1/4=8/4+1/4=9/4
b. 3 3/5=15/5+3/5=18/5
c. 4 9/12=48/12+9/12=57/12
d. 2 5/7=14/7+5/7=19/7
e. 3 1/9=27/9+3/9=28/9
f. 10 11/12=120/12+11/12=131/12
Answer: quit
Step-by-step explanation:
Answer:
17. x = y^2 - 2ay +a^2
18. x = y^2 - a
Step-by-step explanation:
17. Since we want to make x the subject of the formula, we first isolate the square root of x and get
= y - a.
squaring both sides,
x = y^2 - 2ay +a^2
18. Since both x and the a are under the square root, we first start by squaring both sides.
So y^2 = x+a.
Isolating the x, we get
x = y^2 - a