jb141553
29.07.2020 •
Mathematics
What is the value of the 35th term in the sequence -15, -11, -7, ...? 121 125 151 374
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Ответ:
121
Step-by-step explanation:
This is an arithmetic sequence.
First term a = -15
Common difference [d] = second term - first term
= -11 - [-15] = -11 + 15 = 4
nth term = a + (n-1) * d
35th term = -15 + (35 - 1) * 4
= -15 + 34 * 4
= - 15 + 136
= 121
Ответ:
121 and 257
Step-by-step explanation:
So we would have our equation for arithmetic sequences which is a1 is the first term, n is the term we want to know, and d is the common difference. We would plug in the numbers into the equation so we would get . And if you simplify you would get .
Than for the other one we would do the same thing so you would get and if you simplify you would get .
Ответ:
-2x+8=x-1
add 2x to both sides
8=3x-1
add 1
9=3x
divide 3
3=x
sub
y=x-1
y=3-1
y=2
(x,y)
(3,2)