What is the length of ab?

a. 18
b. 12
c. 3
d. 9

Angie has saved 3/8 of the amount she needs to buy a bike. clive has saved 7/10 of the amount he needs to buy a skateboard. what is the difference between clive's and angie's fraction of savings?

Asap! i need this done today and i really don’t understand it. some one ! will mark

5. divide and simplify if possible. √250x16√2x 6. what is the solution of the equation? √2x+13−5=x