Today, noah swam 1 mile at swim practice and Liam sprinted 880 yards at track practice. How many more yards did Noah travel duri
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When the first four terms in an arithmetic sequence are x+y, x-y, xy and x÷y, then the fifth term will be
A sequence of numbers in which every term (except the first term) is obtained by adding a constant number to the previous term is called an arithmetic sequence
In given arithmetic sequence
The first term = x+y
The second term = x-y
Then, the common difference= (x-y)-(x+y)
x-y-x-y= -2y
The third term = x-y+(-2y)
x-y-2y= x-3y
In question third term is given as xy
So both are equal
x-3y=xy
-3y=xy-x
-3y=x(y-1)
x=
Similarly fourth term will be
x-3y-2y=x-5y
substitute the value of x in the equation
Split the middle term and factorize it
(y-1)(5y+3)=0
y cannot be equal to 1, because the third term and fourth term will become x.
substitute the value of y in the equation of x
The fifth term=
Hence, when the first four terms in an arithmetic sequence are x+y, x-y, xy and x÷y, then the fifth term will be
Learn more about Arithmetic sequence here
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Answer: 0.790
Step-by-step explanation:
Given : The state education commission wants to estimate the fraction of tenth grade students that have reading skills at or below the eighth grade level.
The sample size : n= 2004
The number of students read above the eighth grade level = 1584
Then , the proportion of students read above the eighth grade level is given by :-
Hence, the estimate proportion of tenth graders reading at or below the eighth grade level =0.790