Step-by-step explanation:
Total Cost = 25a + 15b + 10c
Answer:
The rocket has a faster unit rate and is
much faster than the penny
Step-by-step explanation:
Find the unit rate of each object and the compare the results
step 1
Find the unit rate per hour of the rocket
To find the unit rate divide the total distance by the time
Let
d -----> the distance in km
t -----> the time in hours
we have


Find the unit rate

step 2
Find the unit rate per hour of the penny
To find the unit rate divide the total distance by the time
Let
d -----> the distance in km
t -----> the time in hours
we have


Find the unit rate

step 3
Compare the unit rates
The units rate of rocket is 
The unit rate of penny is 
Find the difference

therefore
The rocket has a faster unit rate and is
much faster than the penny
6 in a liter, 2 for every third of a liter, so there are 4 grams of sodium in 2/3 a liter of soda
-8x+18y=-12
24x-18y=18
16x=6
X=3/8
Y=3-12)/6
y=-3/2