Amanda's age is one-half of sally's. which variable expression represents amanda's age? 2s 1 2 +s s + 2 s 2

Mp model with mathematics explain how the number of text messages dario sent and the cost form an arithmetic sequence. then write an expression to find dario's text messaging bill if he sends n text messages over 250.

Prove that the sum of two consecutive exponents of the number 5 is divisible by 30.if two consecutive exponents are 5n and 5n + 1, then their sum can be written as 30.

How many $20 bills do you need to have to make $280