Five positive whole number, which are not necessarily all different, are written on 5 different cards. Peter calculates the sum of each pair of cards. He obtains only 3 different results, 57, 70, and 80. What is the biggest number written on the cards? A) 35 B) 42 C) 48 D) 53 E)8

you need more information to answer this question

step-by-step explanation:

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.

r and t.

both are 64 degrees.

22.83 repeating

step-by-step explanation:

137 ÷ 6 is 22.8333333 therefore we understand that 3 is repeating.

happy to

pls mark as brainliest