+818 1. Four friends agree to split the cost of a rental car equally. One of the friends decided to take a taxi, so the remaining three friends each paid $11 more. What was the cost of the rental car, in dollars?
2. London is five hours ahead of New York. A passenger airplane departs New York at 10:30 P.M. The flight is scheduled to last 6 hours, 35 minutes. At what time is the flight scheduled to arrive in London?
3. In the addition problem below, A, B, C, and D represent distinct nonzero digits. What is the value of A+B+C +D? A B A + C C =D 0 0 B
4. Last Tuesday, Frank averaged 40 miles per gallon on his way from his home to work. On the return trip, he took the same route, but only averaged 30 miles per gallon due to slower traffic. What was Frank’s overall fuel efficiency, in miles per gallon, for the round trip? Express your answer as a decimal to the nearest tenth.
5. A right triangular prism has all edges of length 2 cm. What is the surface area of the prism? Express your answer in simplest radical form.
1)
Let the cost of rental car = C
Let the share of each = S, then:
C/4 =S - original share of each
3[S + 11] =C, solve for C, S
C = $132 - cost of the rental car.
S = 33 - original share of each
2)
10:30 PM in New York is 3:30 AM in London
3:30 AM + 6 hours, 35 minutes
10:05 AM - in London the following morning, when the plane lands.
+37157 #4 x miles/ (40 m/g) + x miles/(30 m/g) = 2x miles/ ?m/g
divide by x 1/40 +1/30 = 2/? solve for ? = 34.3 m/g
+130071 1. Four friends agree to split the cost of a rental car equally. One of the friends decided to take a taxi, so the remaining three friends each paid $11 more. What was the cost of the rental car, in dollars?
Let the cost of the rental car = C
So....the amount that each would pay before one left is C / 4
So.....after one lleft.....the amount each pay is C/4 + 11
So
3 (C/4 + 11) = C simplify
(3/4)C + 33 = C
33 = 1/4C multiply both sides by 4
$132 = C
+37157 #5 Three sides are 2x2 so 3 x 2 x2 = 12 cm^2
the ends are equalateral triangles with sides= 2 area = 2 sides x sqrt3/4 x (2^2) =3.464
3.464 + 12 = 15 . 464 cm^2
or 12 + 2 sqrt(3) cm^2
