Answer: 8
Step-by-step explanation: As the woman is not looking and assuming that the probability of taking a red ball is the same of a blue ball, she must select 8 balls to be sure she has at least 3 blue balls.
Because at the case of selecting 5 red balls in the first 5 selects and to have at least 3 blue ones in her hand, she will select the third blue ball at selection number 8.
3/4
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Answer:
The speed of the bus is 40mph.
Step-by-step explanation:
Given that increase in 20% causes the bus to drive at 48mph. In order to find the original speed, we can assume that the original speed is 100% :
100% + 20% = 48mph
120 % = 48mph
1% = 0.4mph
100% = 40mph
Answer:
y=-3x2 - 12x+6
, x = -(-12)/2*3 = 2 this one has axis of symmetry x = 2
Step-by-step explanation:
y = 3x² + 12x+6 : x = -12/6 = -2
y = 3x2 - 6x+12
, x = -(-6)/2*3 = -1
y=-3x2 - 12x+6
, x = -(-12)/2*3 = 2 this one
y=-3x2 + 12x+6 , x = -12/2*3 = -2
Answer:
= 1.75
Step-by-step explanation:
7/6 divided by 6
= 7/36
7/36 = x/9
Cross multiply fractions:
36x = 63
Divide each side by 36:
x = 7/4 or 1.75
