Lisa is estimating the age of artifacts from an archaeological excavation. What is the level of measurement of the data

Karen is financing $291,875 to purchase a house. she obtained a 15/5 balloon mortgage at 5.35%. what will her balloon payment be? a. $220,089.34 b. $219,112.46 c. $246,181.39 d. $230,834.98

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

Which one ? is the answer and how to find this answer