This is for a test review, i’ve tried ever way and still can’t seem to get the correct answer. help!

x=12

Step-by-step explanation:

All angles in a triangle always equal 180 degrees

1. Add all of your angles and set them equal to 180

3x+7+74+63=180

2. Simplify

3x+144=180

3. Combine Like-Terms (Subtract 144 from both sides)

3x=36

4. Simplify

x=12

x=12

Step-by-step explanation:

To find the missing angle of this scalene triangle you must make sure all three angles add up to 180°.

Since you're already provided with 63° and 74°, you are able to get the third angle:

First, add 63+74, which gets you 137.

Next, subtract 137 from 180. (180-137=43).

So, the missing angle is 43.

Now, to solve for x, here's a reference equation:

3x+7=43.

Subtract 7 from both sides to get:

3x=36.

Then, divide both sides by 3:

3x/3=x,36/3=12

So, you end up with:

x=12.

Hope this helps!

7. d. 64

8. i. 32

9. c. 125

10. j. none of the above

11. d. 81

12. i. 216

13. e. none of the above

14. g. 240

15. e. none of the above

16. g. 32

17.   e. none of the above

step-by-step explanation:

the true ones are a b and d