In the parallelogram drawn for the parallelogram method, what does the diagonal between the two terminal points of the vectors represent ? explain your answer

Two customers went to a post office. first customer paid $12 for 14 and 5 envelopes the second paid 24.80 for 10 postcards and 15 envelopes. what is cost of each envelope?

Which of the following functions corresponds to the above sinusoid? a. 10 cos πx - 5 b. -5 sin x - 5 c. -10 cos πx/2 - 0.5 d. 10 sin πx - 5

The gdp is $1,465.2 billion. the population is 249,793,675. find the per capita gdp.