Answer:

Let's start by breaking down the problem.
This is how it should look. ↓
 ÷
 ÷  ⇒
 ⇒  ⇒
 ⇒ 
What does that <em>x</em> mean? <em>x</em> is just a substituted value for the first 2 equations.
Now, we can solve.
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 ÷  
 
Add 3

Now, multiply 6 times 5 squared. What does 5 squared mean? 5 squared is just 5 times itself once. You most likely want to solve 5 squared before multiplying.

And now for the last step, multiply 25 times 6

With that information, the problem is solved! Your answer is 150
 
        
                    
             
        
        
        
Answer:

Step-by-step explanation:
When finding the average of a set of numbers, we 
- A) Add up all the numbers 
- B) Divide that sum by the total number of numbers in the data set 
Let's represent this with a formula, s being the sum of all numbers, n being the total number of numbers.

Since we <u>already know the sum</u> and we <u>know how many numbers there are</u> (8), we can substitute inside our expression  to find the average.
 to find the average.
Therefore, the average of all these numbers is 11.25.
Hope this helped!
 
        
             
        
        
        
Answer:

Step-by-step explanation:

substitute (1) to (2):
 add x to both sides
     add x to both sides

 subtract 5 from both sides
        subtract 5 from both sides


substitute the values of x to (2):

 
        
             
        
        
        
15. -2
16. A. The pool was originally empty
        
             
        
        
        
90% of <span>£41 = 90/100 × 41 = </span><span>£36.9
</span>£41 decreased by 90% = 41 - 36.9 = <span>£4.1</span>