PLEASE HELP ME ITS ALGEBRA

I can try but what's the question or topic?

Step-by-step explanation:

Problem: a(n) = 2a (n-1) -3 given the first term is 2

a = 2

Step-by-step explanation:

Step One: Fill in the variable "n"

The variable n is equal to the number they give us in the problem, which in this case would be 2. If we replace all mentions of variable n with 2 (with the exception of a(n), which we just remove to get "a") we get:

a = 2a (2 - 1) -3

Step Two: Get the remaining variables (a) on the same side

In order to do this, we just have to do some simple subtraction. In this case, we'll subtract 2a from both sides, leaving us with:

-a = (2 - 1) - 3

Step Three: Evaluate.

Following PEMDAS, we'll first evaluate anything in parenthesis, leaving us with:

-a = 1 - 3

Next, we'll do subtraction, giving us:

-a = -2

Lastly, since we're trying to find the value of a, not negative a, all we have to do is divide both sides by -1, giving us our final answer of:

a = 2

5050 i think

step-by-step explanation:

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

                      )

triangle abd and cba are similar,

                            (2)

triangle cad and cba are similar,

                      )

using (1), (2) and (3), we get

hence proved.

therefore option 2 is correct.