Simplify 2a+3b+31

Could someone please help me with this question :)

The triangles are similar. what is the value of x? show your work.

What is the rate of change of a line that passes through (2,-5) and (6,-2)?

The frequency table shows the results of a survey comparing the number of beach towels sold for full price and at a discount during each of the three summer months. the store owner converts the frequency table to a conditional relative frequency table by row. which value should he use for x? round to the nearest hundredth. 0.89 0.90 0.92 0.96