Simplify by combining like terms in each of the following expressions. 1. 1s2 + 10s2 - 21st =

2. 5st + - st - t2 =

3. x2+ x2 + x3=

4. 6 x - 4 x + 2=

5. 9x - 3s - 2t=

6. 87x + 8x - 1 =

7. 3x + 6x - 2 =

8. 8s - 4s + 3s =

9. 12 +1x - 11 x =

10. 12x + 24 x - 3 x - 4 =

11. 14t + 8t - 12t =

12. 17g + 14g - 6g +g =

13. 13 + 12 -12 + 13x =

14. 17s - 3s + 3s =

15. 14t - 12t + t =

I answered only 5 because the question gives only 5 points

- 70

this is the answer for you hope it

m∠cdf = 43° , m∠gdf = 114°, m∠gde = 23°, m∠edh = 23° , m∠cdh = 157°

step-by-step explanation:

since, it is given that de bisects the angle gdh ⇒ de divides the angle gdh into two equal angles.

⇒ m∠gde = m∠edh

⇒ 8·x   - 1 = 6·x + 5

⇒ x = 3

so, m∠gde = 8·x - 1 = 23°

and m∠edh = 23°

now, it is given ∠cde is an straight angle so, m∠cde = 180°

⇒ m∠cdf + m∠fdg + m∠gde = 180°

⇒ 43° + m∠fdg + 23° = 180°

⇒ m∠fdg = 114°

again, m∠cde = m∠cdh + m∠edh = 180°

m∠cdh + 23° = 180°

⇒ m∠cdh = 157°