The 5th term of an arithmetic sequence is 30, while the 13th term is 70

a = 10

d = 5

Step-by-step explanation:

a + 4d = 30 ------------------(I)

a + 12d =70 -------------(II)

Multiply equation (II) by (-1) and then add.So, 'a' will be eliminated and you can find the value of d

(I)         a +   4d = 30

(II)*(-1)   -a - 12d = -70   {Now add}

               - 8d   =  - 40

Divide both sides by (-8)

d = -40/-8

d = 5

Plugin d = 5 in equation (I)

a + 4*5 = 30

a + 20 = 30

a = 30 - 20

a = 10

i believe it is c.y = 9x

rise over run. 9 units up over 1 unit right or 9/1

i use my brain for prombles like this maybe you could try it

step-by-step explanation: