Answer:
thats a long question
Step-by-step explanation:
sorry I'm doing a competition for who ever reaches 1k points
Answer:
x = 2 ±i
Step-by-step explanation:
x^2 = 4x-5
Subtract 4x from each side
x^2 - 4x = 4x-5 -4x
x^2 - 4x= -5
Complete the square
Take the coefficient of the x term, divide by 2 and square it
-4/2 =2 2^2 =4
Add 4 to each side
x^2 -4x+4 = -5 +4
The left side is (x-coefficient of the x term/2)^2
(x-2)^2 = -1
Take the square root of each side
sqrt((x-2)^2) = sqrt(-1)
x-2 = ±i
Add 2 to each side
x-2+2 = 2 ±i
x = 2 ±i
Answer:
M= 1/2(x)+7
Step-by-step explanation:
Let M = Martha.
Let X = Number of Lucy's blocks.
Martha has half the amount as Lucy - 1/2(x)
Then 7 more than that - 1/2 (x) + 7
Answer:
Step-by-step explanation:
Total number of balls = 3 + 2 = 5
1)
a)

b)

c)
Probability of at least one black( means BB or BW or WB)

d)
Probability of at most one black ( means WW or WB or BW)

2)
a) Probability both black without replacement

b) Probability of one black and one white

c) Probability of at least one black ( BB or BW or WB)

d) Probability of at most one black ( BW or WW or WB)
