This problem makes no sence to me i tried it but i know i am completely wrong someone please help.

The cost for a long-distance telephone call is $0.36 for the first minute and $0.21 for each additional minute or portion thereof. Write an inequality representing the number of minutes a person could talk without exceeding $3.

my answer and solving way:
.36x+.21 = 3
-.21 .21
.36x = 2.79
---- ----
.36 .36

x = 7.75

i think o.36+0.21x=3.00
so 0.21x=2.64. then you just find x

let he talks for X minutes
out of this 1 minute is @ 0.36$/min
and (X-1) minutes @ 0.21$/min
therefore
=> 0.36+0.21(X-1)<=3.0
=> 0.36+0.21X-0.21 <=3.0
=> 0.15+0.21X <=3.0
=> 0.21X <=2.85
=> X <= ( 2.85/0.21 )
=> X <14 minutes
precisely X= 13.57 minutes

Let x = number of minutes.
0.21 x + 0.36 = 3.00
0.21 (x-1) = 2.64
x = 13.57 minutes IF the person were charged for the unused part of the last minute. However, the caller would be charged for 1 + 13 minutes, or $3.09. That exceeds the $3 limit, so talking would actually have to stop at 13 minutes, when the charge would be $2.88.

I am having a little trouble with maths because It is really hard 8-)

No worries, math can be challenging but with practice and understanding, it can become easier. Let's walk through the problem step by step.

The problem asks you to write an inequality representing the number of minutes a person could talk without exceeding $3. We'll assume that x represents the number of minutes.

To start, we know that the cost for the first minute is $0.36, and for each additional minute (or portion thereof) it is $0.21. So the total cost for x minutes would be:

0.36 + 0.21(x-1)

We subtract 1 from x because the first minute is already accounted for in the initial $0.36.

We can now set up the inequality:

0.36 + 0.21(x-1) ≤ 3

Next, let's simplify the inequality:

0.36 + 0.21x - 0.21 ≤ 3

0.15 + 0.21x ≤ 3

Now, we can isolate the variable by subtracting 0.15 from both sides:

0.21x ≤ 2.85

Lastly, divide both sides by 0.21 to solve for x:

x ≤ 2.85/0.21

x ≤ 13.57

So, the person can talk for up to 13 minutes and still stay within the $3 limit.