CAN SOMEONE HELP ME PLEASE ASAP!?

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog

Robin spent 25% more time on his research project than he had planned he’s been an extra h ours on the project which of the following expressions could represent the number of hours rob actually spent on the project

Which of the following is best modeled using a linear equation y=ax+b, where a is less than 0?