Answer:
55in is the answer
Step-by-step explanation:
I had the same test
The rate of Sue is 1 car per hour: 1 (c/h)
then the rate of Steve is 2 (c/h) , because Steve works faster, he can wash twice the number of cars, for the same amount of time.
Thus If Steve and Sue work together, they can wash 1 + 2 = 3
(cars per hour).
That is, the rate of Steve and Sue working together, is 3 (c/h).
In the first 30 minutes, Sue washes half of the car.
The remaining half will be washed at a rate of 3 (c/h)
The main formula is Work = Time * Rate
where Work is washing (1/2)c, and rate is 3(c/h)
Time=Work/Rate =
![\frac{ \frac{1}{2} c}{3 \frac{c}{h} }= \frac{1}{6}h](https://tex.z-dn.net/?f=%20%5Cfrac%7B%20%5Cfrac%7B1%7D%7B2%7D%20c%7D%7B3%20%5Cfrac%7Bc%7D%7Bh%7D%20%7D%3D%20%5Cfrac%7B1%7D%7B6%7Dh%20)
1/ 6 h =(1/6)*60 min = 10 min
Answer: 10 min
Since negative 1 is negative, we multiply by 1 and make it negative. Therefore, if the integer is x, the product of that and negative 1 is -1*x=-x
27/25 is in the lowest form
Answer:
the GCF for 84 and 56 is 28
Step-by-step explanation: