Ok so we have the first portion. We need to do cross multiplication first. So that would be 20(2x - 9) and 10(9)
So
20(2x - 9)=90
40x - 180=90
Then add 180 to itself then to 90
40x=270
X=6.75
Now let’s set the next one up knowing what we know from the previous one.
18(3x + 4)= 12(15)
54x + 72=180
Subtract 72 from it’s self and 180
54x=108
X=2
-2/5x -2= 18
-2/5x=18+2
Divide -2/5 with both sides
x= -50
The mean of a sequence of numbers is the average.
The true statement is: 
The given parameters are:
The mean of a dataset is calculated as:
So, we have:
Multiply both sides by m
When the sequence is split into two, we have:
Where:
So, we have:
Hence, the true statement is:
Read more about mean and averages at:
brainly.com/question/16217700
Answer:
254,251,200
Step-by-step explanation:
This is a combination question, since the order doesn't matter, the formula for combinations is n!/(n-r)! n is the amount of things we can choose from but r is the amount of things (employees in this case) we actually select. n = 50 and r = 5. This we get 50!/(50-5)! or 50!/45!, using a calculator, we can find that 50!/45! is equal to 254,251,200. That is our final answer for the amount of combinations available.
The vertex form of the function f(x) is 
.
<h2>Given </h2>
Function; 
<h3>What is the vertex form of function?</h3>
The vertex of a parabola is the point at which the parabola passes through its axis of symmetry.
The standard equation which represents the vertex form of the function is;
Where h and k are vertexes of the given parabola.
The function is in vertex form;
Hence, the vertex form of the function f(x) is .
To know more about the Vertex form lick the link given below.
brainly.com/question/9070346
