The variable r represents a value in the set (4,6,7,8). Which value of r makes 2(r-4) + 3=7 a true statement?

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning

At $1.32 million, they closed last month percent above what they paid in 2007." how much did they pay in 2007?