book Maths Puzzle Numerical Ability

Brandon pays $4.95 a month for a long distance telephone service that offers a flat rate on 7 cents per minute. One month his total long distance bill was $10.69. How many minutes of long distance telephone calls were made that month?

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book Other Question

Sarah is the manager of a mutual fund. She placed 30% of the fund's available cash in a 6% annual simple interest account, 25% in 8% corporate bonds, and the remainder in a money m 1.In the case of finding the value of the determinant how it is related to the set of linear equations?
2. what does it mean (physically) by multiplying the first element of first