With sn denoting the sum of the first n terms of an arithmetic sequence, we are given that s1=9 and s2=20
a) find the 2nd term
b) calculate the common difference of the sequence
c) find the 4th term

You and a friend went to the movies. you spent half your money on tickets. then you spent 1/4 of the money on popcorn, $2 on candy, and $3 on a soda. if you have $1 left, hiw much money did u take to the movies?

Point r divides in the ratio 1 : 5. if the coordinates of e and f are (4, 8) and (11, 4), respectively, what are the coordinates of r to two decimal places?

Aright cylinder has a diameter of 8 m and a height of 6m. what is the volume of the cylinder