Express the exercise as a system of linear equations, then find the solution. Use a calculator where appropriate.An 8-cylinder sedan gives 18 miles per gallon in city driving and 21 miles per gallon in highway driving. A 300-mile trip required 15.5 gallons of gasoline. How many whole miles were driven in the city?
A. 132 mi
B. 168 mi
C. 147 mi
D. 153 mi
Answer: D
You might also like to view...
Calculate the quotient.
A. 3 B. -5 C. 4 D. -4
Determine the slope and the y-intercept. Then graph the equation.y = - 
x + 6
A. m = - 
; y-intercept: (0, -6)
B. m = - 
; y-intercept: (0, 6)
C. m = 
; y-intercept: (0, -6)
D. m = 
; y-intercept: (0, 6)
If R is the set of real numbers, Q is the set of rational numbers, I is the set of integers, N is the set of natural numbers, and S is the set of irrational numbers, list the set(s) for which a solution to the given equation exists. If a solution to the given equation does not belong to any set, state none.
= ?25
A. S, R B. Q, R C. R D. none
Solve.When an object is dropped to the ground from a height of h meters, the time it takes for the object to reach the ground is given by the equation t = 
, where t is measured in seconds. If an object falls 44.1 meters before it hits the ground, find the time it took for the object to fall.
A. 9 seconds B. 3 seconds C. 4 seconds D. 6 seconds