We need to 'standardise' the value of X = 14.4 by first calculating the z-score then look up on the z-table for the p-value (which is the probability)
The formula for z-score:
z = (X-μ) ÷ σ
Where
X = 14.4
μ = the average mean = 18
σ = the standard deviation = 1.2
Substitute these value into the formula
z-score = (14.4 - 18) ÷ 1..2 = -3
We are looking to find P(Z < -3)
The table attached conveniently gives us the value of P(Z < -3) but if you only have the table that read p-value to the left of positive z, then the trick is to do:
1 - P(Z<3)
From the table
P(Z < -3) = 0.0013
The probability of the runners have times less than 14.4 secs is 0.0013 = 0.13%
Ok to FACTOR:
- 5(p + 3) = 9(- 7 + p)
4p - 78
Answer = 2(2p - 39)
To Simplify: Step by Step
- (5p + 3 ) + 9(- 7 + p)
Distribute:
= (- 5)(p) + (- 5 )(3) + (9)(- 7) + (9)(p)
= -5p + - 15 + - 63 + 9p
combine like terms:
= - 5p + - 15 + - 63 + 9p
= ( - 5p + 9p) + ( - 15 + - 63)
= 4p + - 78
Answer = 4p + - 78
Don't' really know what you were asking, but I did both Factoring, and Simplifying......LOL
Hope it helps.!!
Answer:
15
Step-by-step explanation:
x+(x+1)+(x+2)= 48
=)3x+3=48
=)3x=45
X=15
Answer:
the answer is C I hope it helps you
If I remember correctly you should get y=2x-4 as your equation. I believe when the line is perpendicular you flip the slope given and plug in the coordinates into the x and y spots to solve. Hope this is right!