Solve the problem.Joe has a collection of nickels and dimes that is worth $4.25. If the number of dimes was doubled and the number of nickels was increased by 10, then the value of the coins would be $7.85. How many dimes does he have?
A. 10
B. 23
C. 15
D. 31
Answer: D
Mathematics
You might also like to view...
Multiply the monomials.(-5z2)(3z3)
A. -15z6 B. 675z5 C. 15z6 D. -15z5
Mathematics
Perform the indicated operation.8.4 kg + 5.4 kg
A. 13.8 kg B. 30 kg C. 138 kg D. 3 kg
Mathematics
Find an equation of a parabola satisfying the given conditions.Focus at 
, directrix y = - 
A. x2 = 3y B. y2 = 3x C. y2 = 12x D. x2 = 12y
Mathematics
Solve the problem.The winner of the 1998 Peoria 500 (mile) race was Serge Bologna, with an average rate of 191.665 miles per hour. What was his time in hours? (Round to the nearest one thousandth hour.)
A. 2.609 hours B. -7.391 hours C. 12.609 hours D. 95,832.500 hours
Mathematics