What is the diagonal length of a photo frame with dimensions that are 24 cm x 7 cm
A) 19 cm
B) 25 cm
C 28 cm
D) 32 cm
(Thank you in advance please explain im so lost

Sum of the interior angles of a pentagon

Car a and car b were in a race .the driver of car b claimed that his car was twice as fast as car a

How many liters of peroxide should be added to 12 liters of an 8% peroxide solution so that the resulting solution contains 16% peroxide?   original added new amount of peroxide 0.96 liters x 0.96 + x amount of solution 12 liters x 12 + x 0.18 liter 1.14 liters 1.92 liters 2.10 liters