If sue mows nine lawns in 3 hours, and Jack mows lawns in 3 hours (as in problem one above), and we wish to discover how long it will take Jack and Sue working together to mow 1 lawn, and we let t stand for that time, an equation which could be used to solve for t would be:
a. 9t+6t=1
b. 1/2t+3t=1
c. 2t+3t=1
d. 1/9t+1/6t=1
2007-11-18 12:23:54 · 7 answers · asked by ~Sweetcheeks~ 2 in Science & Mathematics ➔ Mathematics
OK
I saw your first part of the question, which states that Jack mows 6 lawns in 3 hours, or 2 lawns in an hour.
Interestingly, Sue mows 9 lawns in 3 hours or 3 lawns in an hour.
Together, at the rates described, they would mow 5 lawns in one hour, or one lawn in 12 minutes.
From the equations you have, C would be the best answer IF the 1 on the end represents 1 hour
2(12) + 3(12) = 1hour
24 minutes + 36 minutes = 1 hour.
So if t represents the amount of time they take to mow one lawn together and the 1 at the end represents 1 HOUR (not one lawn) C can correctly be solved for t.
IF you interpret the 1 at the end to be one lawn, than none of your equations would work.
Hope that helps.
2007-11-18 12:37:43 · answer #1 · answered by pyz01 7 · 0⤊ 0⤋
9 lawns in 3 hours is 3 lawns per hour, or 3t. 3 hours per lawn is 1/3t. So 3t+1/3t=1
None of the above.
2007-11-18 20:44:36 · answer #2 · answered by Anonymous · 0⤊ 0⤋
a. 9t+6t=1
2007-11-18 20:27:14 · answer #3 · answered by Anonymous · 0⤊ 0⤋
none of the above
2007-11-18 20:26:59 · answer #4 · answered by vanessa 6 · 0⤊ 0⤋
d my parents told me if you have any questions u can always google it
2007-11-18 20:30:00 · answer #5 · answered by luis c 1 · 0⤊ 0⤋
b
2007-11-18 20:29:01 · answer #6 · answered by PoOÒ°A 1 · 0⤊ 0⤋
d.
2007-11-18 20:26:36 · answer #7 · answered by alex s 2 · 0⤊ 0⤋