Replace x with -1, and y = 9
Therefore, (x²y)/-7 becomes (-1² · 9)/-7
-1² is just 1, and 1 × 9 is just equal to 9, so your final answer is -9/7.
Answer:
0.78814
Step-by-step explanation:
We solve using z score
z = (x-μ)/σ, where
x is the raw score = 4.0 inches
μ is the population mean = 4.4 inches
σ is the population standard deviation = 0.5 inches
z = 4.0 - 4.4/0.5
z = -0.8
Probability value from Z-Table:
P(x<4.0) = 0.21186
P(x>4.0) = 1 - P(x<4.0)
= 1 - 2.1186
= 0.78814
The probability that the rod you chose will be greater than 4.0 inches is 0.78814.
Answer:
x is greater than or equal to -8
Step-by-step explanation:
multiply by 2 to get the x alone, and you have your answer.
VARIABLES:
[x] Yearbook Club (expression: x)
[y] Drama Club (expression: x + 12)
EQUATIONS:
#1 x + y = 72
#2 y = x + 12
Now we shall use the method of substitution to solve.
FINDING X:
#1 x + (x + 12) = 72
#2 2x + 12 = 72
#3 2x = 60
#4 x = 30
The amount of students in the yearbook club: 30
The amount of students in the drama club: 72 - 30 = 42
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