Tutors Answer Your Questions about Human-and-algebraic-language (FREE)
Question 1145947:
Meg rowed her boat upstream a distance of 15 mi and then rowed back to the starting point. The total time of the trip was 16 hours. If the rate of the current was 7 mph, find the average speed of the boat relative to the water.
Click here to see answer by ikleyn(52780)   |
Question 1145949: Jeff and Kirk can build a 75-ft retaining wall together in 5 hours. Because Jeff has more experience, he could build the wall by himself 2 hours quicker than Kirk. How long would it take Kirk (to the nearest minute) to build the wall by himself?
Click here to see answer by ikleyn(52780) |
Question 1145944: Jeff and Kirk can build a 75-ft retaining wall together in 7 hours. Because Jeff has more experience, he could build the wall by himself 3 hours quicker than Kirk. How long would it take Kirk (to the nearest minute) to build the wall by himself?
Click here to see answer by ikleyn(52780) |
Question 1145948: Twin brothers, Billy and Bobby, can mow their grandparent's lawn together in 73 minutes. Billy could mow the lawn by himself in 35 minutes less time that it would take Bobby. How long would it take Bobby to mow the lawn by himself?
Click here to see answer by ikleyn(52780) |
Question 1145945: Twin brothers, Billy and Bobby, can mow their grandparent's lawn together in 113 minutes. Billy could mow the lawn by himself in 40 minutes less time that it would take Bobby. How long would it take Bobby to mow the lawn by himself?
Click here to see answer by ikleyn(52780) |
Question 1145946:
A boat traveled downstream a distance of 90 mi and then came right back. If the speed of the current was 20 mph and the total trip took 6 hourscomma nbspfind the average speed of the boat relative to the water.
Click here to see answer by ikleyn(52780) |
Question 1145950: Homer and Mike were replacing the boards on Mike's old deck. Mike can do the job alone in 1 hour less time than Homer. They worked together for 5 hours until Homer had to go home. Mike finished the job working by himself in an additional 4 hours. How long would it have taken Homer to fix the deck himself?
Click here to see answer by josgarithmetic(39617) |
Question 1145943:
Homer and Mike were replacing the boards on Mike's old deck. Mike can do the job alone in 1 hour less time than Homer. They worked together for 7 hours until Homer had to go home. Mike finished the job working by himself in an additional 3 hours. How long would it have taken Homer to fix the deck himself?
Click here to see answer by josgarithmetic(39617) |
Question 1146394: Juan recently hired a contractor to do some necessary work. On the final bill, Juan was charged a total of $716. $300 was listed for parts and the rest for labor. If the hourly rate for labor was $52, how many hours of labor was needed to complete the job?
(A) First write an equation you can use to answer this question. Use x as your variable and express any percents in decimal form in the equation.
The equation is
(B) Solve your equation in part (A) to find the number of labor hours needed to do the job.
Answer: The number of labor hours was
Click here to see answer by josgarithmetic(39617) |
Question 1152137: The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half its initial mass. Starting with 110 grams of a radioactive isotope, how much will be left after 6 half-lives?
Click here to see answer by Theo(13342)  |
Question 1152823: To rent a certain meeting room, a college charges a reservation fee of
$
38
and an additional fee of
$
5.70
per hour. The history club wants to spend at most
$
60.80
on renting the meeting room.
What are the possible amounts of time for which they could rent the meeting room?
Use
t
for the number of hours the meeting room is rented, and solve your inequality for
t
.
Click here to see answer by Edwin McCravy(20054)  |
Question 1152823: To rent a certain meeting room, a college charges a reservation fee of
$
38
and an additional fee of
$
5.70
per hour. The history club wants to spend at most
$
60.80
on renting the meeting room.
What are the possible amounts of time for which they could rent the meeting room?
Use
t
for the number of hours the meeting room is rented, and solve your inequality for
t
.
Click here to see answer by josmiceli(19441)  |
|
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