81, 27, 9, find the common ratio of the given sequence, and write an exponential function which represents the sequence. use n = 1, 2, 3, a) 3; f(n) = 81^n-1 b) 3; f(n) = 81(3)^n-1 c) 1 /3 ; f(n) = 81(3)^n-1 d) 1/ 3 ; f(n) = 81(1 /3 )^n-1answer -since each term is multiplied by 1/3to get to the next term, the common ratio is 1/3. the common ratio is also the base of anexponential function. the correct answer is1/3; f(n) = 81(1/3)^n-1so d.

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)

the solution is the point

step-by-step explanation:

we have

> equation a

> equation b

adds equation a and equation b

substitute the value of x in equation b to find the value of y

the solution is the point