Evaluate x-y if x = 7/10 and y=3/5?
and also this question too
evaluate s+t if s = 2/3 and t 5/6

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

Ling listed all of the factors of a mystery number: 1,2,4,8,16,32 what is the mystery number?

If a 36 inch yardstick casts a 21 foot shadow, how tall is a building whose shadow is 168 feet? what is the scale factor