Lisa invests $4,000 in two types of bonds: x, which offers a 10% return, and y, which offers a 6% return. if the combined return on the investment is $300, how much did lisa invest at the rate of 6%?

The random variable x is the number of occurrences of an event over an interval of ten minutes. it can be assumed that the probability of an occurrence is the same in any two-time periods of an equal length. it is known that the mean number of occurrences in ten minutes is 5.3. the appropriate probability distribution for the random variable

The length of a rectangle plus its width is 25 cm. the area is 156 square cm. what are the length and width of the rectangle? separate the answers with a comma.

Which of the following is the result of expanding the series