Could someone me answer this question because i really don't know how to get the answer or solve it

What is the answer to |-2x-5|-|-4+8| and x=7

The length of the largest fish is 967.74 times greater than the length of the smallest fish. select a variable expression that shows the length of the largest fish, if 8 is the length of the smallest fish. a. s + 967.74 b. \[ \frac{967.74}{s} \] c. 967.74 - s d. 967. 74s

Out of 50 students surveyed, 16 have a dog. based on these results, predict how many of the 280 students in the school have a dog.