Sofia is 4 years younger than Mark. David is 7 years older than Mark. How old will Sofia be when David is 30 years old? please answer

Evaluate 4 a for a = 5 2/3 . express your answer in simplest form.

Is every rectangle is a parallelogram? true false

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.