Ineed to find the answers to these 4 algebra problems. i don't know what i'm doing wrong, i got everything right in

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

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

Jose predicted that he would sell 48 umbrellas. he actually sold 72 umbrellas. what are the values of a and b in the table below? round to the nearest tenth if necessary