Please help. answer and explain:

(-2 x^3 y^4)((-3) x^4 y^4)

Lisa berry plans to rent an apartment for $1,090 per month. she estimates the annual expense will be as shown on the chart below. what is her average monthly cost?

What are the constants in this expression? -10.6+9/10+2/5m-2.4n+3m

Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]