Hii everyone myself ashutosh anand from india

any girl here ??

Find the greatest common factor of the polynomial: 10x^5+15x^4-25x^3 10x^5 x^3 5x^3 5

Two cyclists 84 miles apart start riding toward each other at the samen time. one cycles 2 times as fast as the other. if they meet 4 hours later what is the speed (in miles) of the faster cyclists

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16