The awnser is D to your question
The solution to the problem is as follows:
For 3 notebooks you pay $1.98 so the ratio is 1:0.66.
For 10 notebooks, then we could scale the ratio and it will become 10:6.60. So they will cost you $6.60.
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change
given you
making x the subject by transferring the -19 to the right hand side of the equation
dividing through by 5
{}
also given
change the operation sign to =
dividing through by -4
so the truth set is
{x:x>9/4}.
The < sign changes to > because we divided by a negative number when solving for x
Circumference = πd, where d = diameter
we know the wheel has a diameter of 27 inches, so the total circumference is 27π, and that's the arc length of one revolution.
there are 5280 feet in 1 mile and 12 inches in 1 foot.
so in 40 miles there are 40(5280)(12) inches.
and we also know that there are 60 minutes in 1 hour.