When a number is increased by 7.1%, the result is 89. what is the original number  to the nearest tenth?

The original number is

Step-by-step explanation:

Let

x -----> the original number

Remember that

The increased number is equal to multiply the original number by the factor 1.071

so

Solve for x

Divide by 1.071 both sides

third option: 6x+8

step-by-step explanation:

we can see that the given question is a sum of series and the values of n vary from 0 to 3

the first term will be:

when n=0, [(0)*x+2] => (0+2) => 2

when n=1, [(1)*x+2] => (x+2) => x+2

when n=2, [(2)*x+2] => 2x+2

when n=4, [(3)*x+2] => 3x+2

so adding up all the terms will give us:

=2+x+2+2x+2+3x+2

=x+2x+3x+2+2+2+2

=6x+8

so,

third option is the correct answer ..

i pretty sure it is