Answer:
a) 0.1429
b) 0.2667
c) 0.3067
d) 0.3524
Step-by-step explanation:
Blue = 6
Gray = 7
Black = 2
Number of socks = 15
a) 2 blue socks.
The probability of getting two consecutive blue socks is:

b) no gray socks.
The probability of getting no grey socks with two picks is:

c) at least 1 black sock.
The probability of getting at least one black sock is:

d) matching socks.
The probability of getting matching socks is the sum of the probabilities of getting 2 black, 2 blue or 2 gray socks:

Answer:
Yes.
Step-by-step explanation:
A quadrilateral is any polygon with four sides. A rectangle, by definition, is a polygon with four sides and four right angles. Thus, every rectangle is a quadrilateral.
Here's the picture, if anyone still needs it.
Answer:
749 ft
Step-by-step explanation:
It's a right-angle triangle so you can use trig ratios
750 feet
tan(59) = opposite/adjacent
tan(59l = X/450
X = 450×tan(59)
X = 748.9 ft
X = 749 ft (correct to 3 sf)