For what value of m will the system of equations 18x-72y+13=0 and 7x-my-17=0 have no solution?

What is the value of X ?, if 7580 - X = 3440

If 551 ÷ 29 = 19 then 5.51 ÷ 0.0019 = ?

Find the value of given expression. 

[76 – {90 ÷ 5 ⨯ (24 – 36 ÷ 3) ÷ 3}] 

The value of $$ \sqrt{11.981+7\sqrt{1.2996}}$$ is closest to 

The square root of a positive number less than 100 lies between

Direction: what should come in place at question mark(?).

45% of 224×?% of 120=8104.32

If 1.5 a=0.04 b then $$ {b-a\over b+a}$$.