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Where to round of decimals?

Step-by-step explanation:

I keep getting rounded answers and none of them are correct. They all go pass 180 but:

14x + 2 + x = 180

OR

89 + 7x - 10 + x = 180

Since ALL triangles = 180

* You will get a decimal answer either way. I am checking it with my calculator and this is easy algebra but the answers are decimals.

You need to ask your teacher if you round to a certain point because they are all decimal answers.

Angle NST : 156 degrees

Step-by-step explanation:

Let's find the angle STU.

We know that the sum of angles of the triangle STU is equal to 180 degrees.

89 + 7x - 10 + angle STU = 180

The angle NST is equal to 14x + 2 and the sum of the angle NST and the angle STU is 180°.

Hence : Angle STU + Angle NST = 180°

Angle STU + 14x + 2 = 180°

Angle STU = 180° - 14x -2

89 + 7x - 10 + 180 - 14x -2  = 180

-7x + 257 = 180

-7x = -77

x = 11

Angle NST : 14 (11) +2 = 156 degrees

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

step-by-step explanation: