Which equation best represents this situation?

the sum of 21 and an unknown number is equal to 30.

a. 21b = 30

b. 21 + b = 30

c. 21 ÷ b = 30

d. 21 - b = 30

Which segments are congruent? o jn and ln o jn and nm o in and nk onk and nm

Angela is buying a dress that is on sale for 20% off. if the original price of the dress is $40.00, how much money is angela saving on the dress? a. $0.80 b. $3.20 c. $32.00 d. $8.00

The map shows the location of the airport and a warehouse in a city. though not displayed on the map, there is also a factory 112 miles due north of the warehouse. a truck traveled from the warehouse to the airport and then to the factory. what is the total number of miles the truck traveled?