Step-by-step explanation:
we see the common difference is
a2-a1 = 11x + 9 - 4x - 5 = 7x + 4
an = an-1 + (7x+4) = a1 + (n-1)×(7x+4)
for a7 we have then
a7 = 4x + 5 + 6×(7x +4) = 4x + 5 + 42x + 24 = 46x + 29
Maybe the price of the fourth pair is like about fifty dollars because the average of the four shoes are fifty dollars. The other shoe pairs that he/she bought is thirty five, forty and fifty dollars.
So, the price is about fifty dollars.
First equation
L.H.S = 4x -0.25y
so it doesn't equal the R.H.S
2nd equation
R.H.S = 15q + 3qr
so it doesn't equal the L.H.S
3rd equation
R.H.S = -30m -60n
so R.H.S doesn't equal L.H.S
4th equation
L.H.S = -16a +4
so L.H.S equal R.H.S
The answer is D
Answer:
7 is median, 1 is minimum, 12 is maximum, 11 is upper quartile, 2 is lower quartile
if you add both hours together you'll come up with two hours, then add 45 and 15
45+15=60minutes
60minutes=1hour
three hours.