2x+40=3x-85
2x-3x+40=3x-3x-85
-x+40=-85
-x+40-40=-85-40
-x=-125
Multiply by -1 to get positive x and for -125
(-1)(-x)=(-125)(-1)
x=125
Check answer by using substitution method
2(125)+40=3(125)-85
250+40=375-85
290=290
Answer is x=125
Answer:
y=2x+2
Step-by-step explanation: y=mx+b
To find M:
10-(-2) divided by
4-(-2) equals
12/6=3
To find B:substitute
10=2(4) +b
10=8+b
-8 -8
2=b
Answer:
a)0.5611
b)0.1828
c)0.6217
d)0.4389
e)6.25
Step-by-step explanation:
Let's define the following event :
X : ''Calls involving a fax message''
The random variable X can be modeled as a Binomial random variable.
N ~ Bi(n,p)
N ~ Bi(25,0.25)
Where n is the sample and p is the success probability
Let's also define nCr as the combinatorial number :
The probability function for X is :
Where k is the number of success
a)
b)
c)
d)
e) They are asking us about the expected value for random variable X
In a Binomial random variable :
E(X) = μ = n.p
Answer:
Simplify the expression.
13
x
3
+
3
x
2
+
1
Step-by-step explanation:
Answer:
x = 11
Step-by-step explanation: