angle a and angle b are both complementary angles. the measure of angle b is (4x) and the measure of angle a is 50. whats the value of x show work. answer asap please

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

answer: 177/8

step-by-step explanation:

x= cost per bracelet

number of bracelets * x + shipping charge = total cost

so

9x+9=72

the answer is 9 because the question is telling how much it be together.