If

then we also have

Pairing up the terms, we can find that


 consists of
 consists of  terms, so there are
 terms, so there are  copies of
 copies of  in the sum
 in the sum  . Then we find an immediate closed form for the sum:
. Then we find an immediate closed form for the sum:

 
        
             
        
        
        
First, convert 17/3 to an improper fraction. 17/3 becomes 5 2/3.
Then convert 5 2/3 to a decimal.
5 2/3 becomes 5.666...
Then convert the decimal to a percent.
5.666... becomes approximately 566.66%
        
             
        
        
        
The value of r is -21/9.
The term BODMAS, which stands for brackets of, division, multiplication, addition, and subtraction, might be used to simplify the expression. It specifies how to answer a mathematical expression in a particular order.
-13=r/9+8
-13-8=r/9
-21=r/9
-21/9=r
What is Expressions and Equations?
Algebraic expressions include variables, numbers, and operational signs. Examples include multiplication, division, exponentiation with the natural exponent, addition, and subtraction. 
Fractional expression is the name given to division in an algebraic expression with variables.
Rational numbers are those that can be expressed in fractional form.
An algebraic expression is referred to as being irrational if it contains the variable's root or a fractional power with a changeable base.
To learn more about Expressions and Equations refer the above link:
brainly.com/question/723406
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Answer:
4 umbrellas
Step-by-step explanation:
Number of Umbrellas              Total Money 
                 1                                            $12                 
                 2                                           $24
                 3                                           $36
                 4                                           $48
She can't go over $48 because $48 + $12 is $60, which is more than she has ($54). So the max amount of umbrellas she can buy is 4.
 
        
             
        
        
        
Answer:
negative correlation
Step-by-step explanation:
If you were to draw a line of best fit (a line that best expresses the relationship between a group of points), it would have a negative slope.