Afamily has two cars. the first car has a fuel efficiency of 40 miles per gallon of gas and the second has a fuel efficiency of 25 miles per gallon of gas. during one particular week, the two cars went a combined total of 2150 miles, for a total gas consumption of 65 gallons. how many gallons were consumed by each of the two cars that week?

Step-by-step explanation:

Follow the steps of your previous question.

x - gallons of first car

y - gallons of second car

x+y=65 gal

40x+25y=2150 mi

40x+25y=2150

25x+25y=1625

15x=525

x=35 gal

y=65-35=30 gal

Hope this helps!

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)

see below

step-by-step explanation:

x+2> 6

subtract 2 from each side

x+2-2 > 6-2

x > 4

there is an open circle at 4 since is it is greater than and the line goes to the right