crap

John has quarters, nickels and dimes in his pocket. The ratio of the number of each type of coin is the same as the relative value of the coins. If doubling the number of each of the coins in his pocket leaves John with nine dollars in his pocket, how many quarters did he originally have? (A) 2 (B) 4 © 10 (D) 15 (E) 20 Please explain your answers. Tx

Is positive number x greater than 1.5? (1) The units digit of x is greater than 1. (2) The tenths digit of x is greater than 5.

A circular jogging track forms the edge of a circular lake that has a diameter of 2 miles. Johanna walked once around the track at the average rate of 3 miles per hour. If t represents the number of hours it took Johanna to walk completely around the lake, which of the following is a correct statement? a. 0.5 b. 1.75 c. 2.0 d. 2.5 e. 3

For which of the following functions f is f(x) = f(1-x) for all x? a. f(x) = 1 - x b. f(x) = 1 - x^2 c. f(x) = x^2 - (1-x)^2 d. f(x) = x^2 (1-x)^2 e. f(x) = x / (1-x) Please explain the answer.

sjmit4,thanks for the shortcut. doubt-1: ...........-4.......... -3 ........... .......... (0).........(0)........... (+) ve........ (-) ve ....(+) ve From the above, how did you come out with the range? doubt-2: "for values between (-4) and (-3); (x+3) will be negative but (x+4) are positive hence [equation Values between (x+3) and (x+4) should all be -ve right? How can (x+4) will be positive. I'm not getting the approach. :hmm:

The present ages of a husband and wife are in the ratio of 9:8. If their ages are integers, what could be the possible ratio of their ages five years later? A. 10:9 B. 11:10 C. 12:11 D. 13:12 E. 16:13

A certain amount was to be divided among A, B and C in the ratio of 4:5:6 but by mistake, it was divided in such a manner that 4 times of A's share was equal to 5 times of B's share and 6 times of C's share. As a result, A got $154 more than the expected amount. What was the amount that was divided among them?

Is |a-c| 1. The sum of any two numbers among a, b and c is greater than the third number. 2. a, b and c are non-zero numbers. Explain the answer please.

Find the range of values of x for which x^2 + 7x + 12 > 0. Please explain the answer.

A bag contains 5 blue and 4 black balls. 3 are drawn at random. What is the probability that 2 are blue and 1 is black? Ans with explantion pls. Thanks

One card is drawn at random from a pack of 52 cards. What is the probability that the card drwaw is either red card or king? Ans only with explanations