If pq and rs intersect to form four right angles which statement is true

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.

When 142 is added to a number the result is 64 more then 3 times the number. option 35 37 39 41

Which expression is rational? 6. , square root two, square root 14, square root 49