Question

Rate Problem

AHHHHHHHHHHH

Answer 1

To set up a rate problem algebraically, use the equation:

w = rt,

where w represents the work to be done, r represents the rate, and t represents the time it takes to complete the work.

Answer 2

Please help me solve this one there are a bunch more EXACTLY like it so i really need to know how to do it

Answer 3

Jeff and Lucy have been asked to wash their mom’s minivan. It takes Jeff 2 hours to wash the van by himself, and it takes Lucy 1.5 hours to wash the van by herself. How long will it take Jeff and Lucy to wash the van if they work together?

What equation is used to solve this problem? What does each variable represent?
Identify the given information.
Enter the given information into the equation.
Solve the equation.
State the solution.

Answer 4

ok here we go, but first the answer

\[\frac{2\times 1.5}{2+1.5}\]

Answer 5

please give info in this format/order
What equation is used to solve this problem? What does each variable represent?
Identify the given information.
Enter the given information into the equation.
Solve the equation.
State the solution.

Answer 6

trick is to say that washing the van is 1 as in one job
jeff takes two hours, so his rate is \(\frac{1}{2}\) per hour

Answer 7

1/4 an hr not 1/2 of job an hr right?

Answer 8

lucy takes 1.5 hours so her rate is \(\frac{1}{1.5}=\frac{2}{3}\) per hour

Answer 9

never mind i'm thing about 1/2 hrs :)

Answer 10

now we use amount equals rate times time
jeffs rate is \(\frac{1}{2}\) and if we put time as \(t\) his contribution is \(\frac{1}{2}t\)
lucy's is \(\frac{2}{3}t\) and we want to know how long (as in solve for \(t\) ) it will take them to complete one job
set
\[\frac{1}{2}t+\frac{2}{3}t=1\] and solve for \(t\)

Answer 11

there are many ways to solve this but in this case we can simply add on the left
\[\frac{1}{2}t+\frac{2}{3}t=1\]
\[\frac{7}{6}t=1\]
\[t=\frac{6}{7}\]

Answer 12

State the solution please in non numerical form

Answer 13

if you want it to look more like \(w=rt\) then the combines rate is \(\frac{1}{2}+\frac{2}{3}=\frac{7}{6}\) and so you can write
\[\frac{7}{6}t=1\]

Answer 14

what the monkey does "non - numerical form" mean?

Answer 15

so it will take them 70 min to wash the van together??

Answer 16

no answer is \(\frac{6}{7}\) so sixth seventh of an hour, not 7 sixths of an hour

Answer 17

how long is that min wise?

Answer 18

about \(51\tfrac{6}{7}\) minutes

Answer 19

roughly 50 min then?

Answer 20

i would round to 51

Answer 21

i made a mistake it is \(51\tfrac{3}{7}\) minutes

Answer 22

yes, roughly 50

Answer 23

yeh the decimal value is 51.42 under 1/2 so rounding down i go :)

Answer 24

on line class?

Answer 25

yes 7 assignments left

Answer 26

@satellite73 thnx you are a lifesaver