What is the result of adding -2.9a + 6.8 and 4.4a - 7.3 ?

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.

The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.

The probability that an adult possesses a credit card is .70. a researcher selects two adults at random. by assuming the independence, the probability that the first adult possesses a credit card and the second adult does not possess a credit card is: