Multiplying fraction what is 5/8x6/15

Which equation and solution can be used to solve this problem? thirteen less than a number is sixteen. 13-n=16: add 13 to both sides. the answer is 29. n+13=16: subtract 13 from both sides. the answer is 3. n+16=13 subtract 13 from both sides. the answer is 3. n-13=16: add 13 to both sides. the answer is 29.

Find the quotient. 50a2 – 98b2 -5a +7b

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section