Sara worked 22 hours last week. joan worked 4 hours less than sara, and erin worked half as many hours as joan. how many hours did sara, joan, and erin work last week?

Explanation:

You may set a numerical equation by translating the word statements into arithmetic expressions in this way:

1) Sara worked 22 hours last week: 22

2) Joan worked 4 hours less than Sara: 22 - 4

3) Erin worked half as many hours as Joan: [22 - 4] / 2

4) How many hours did Sara, Joan, and Erin work last week? : add up every arithmetic expression:

5) Simplify doing the operations:

Conclusion:

SO basically Sara worked for 22 hours and Joan worked for 18 hours and Erin worked for only 9 hours. 22 + 18 + 9 = 49 hours in total.

hello there!

i believe the answer is

(cot2+1)/sec2=cot2

    csc2/sec2=cot2

  (1/sin2)/(1/cos2)=cot2

  (1/sin2)(cos2/1)=cot2

  cos2/sin2=cot2

  (1/tan2)=cot2

  (cot2)=(cot2)

hope this !

hyperz ^_^