4x+20 3x
determine the value of x

Plzzz answer both questions and i will give you 100 points

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

12 3 4 5 6 7 8 9 10 time remaining 42: 01 ryan gathered data about the age of the different dogs in his neighborhood and the length of their tails. which best describes the strength of the correlation, and what is true about the causation between the variables?