Marie had 20 Christmas balls to decorate her Christmas tree. During
weekends she buys additional Christmas
balls (r). Express her total Christmas balls
in algebraic expression.
A. 20r
B. 20 + r
C. 20 - r
D. r - 20

You are cycling around europe with friends. a cycling festival is starting soon in barcelona. it will take 4.5 hours to cycle there. how many minutes in total is this?

Louise measured the perimeter of her rectangular scrapbook to be 154 cm. if the scrapbook is 45 cm wide, how long is the scrapbook?

Prove the divisibility of the following numbers: 25^9 + 5^7 is divisible by 30.also, read as (25 to the power of 9) + (5 to the power of 7) is divisible by 30. blank x 30what is the blank? ( it should be expressed in exponent form)