There are 12 third grade students and 15 4th grade students in the band they will travel to a concert in cars that can hold four students each which of these can be used to find out how many cards are needed to drive the students

#_cars = 7

Explanation:

For this exercise let's start by finding the total number of students

          #_students = 12 +15

          #_students = 27

Now we can use a direct proportion relationship or rule of three. If 4 students drive, how many cars for 27 students?

          #_cars = 27 (¼)

          #_cars = 6.75

the number of cars must be an integer therefore the correct answer is

         #_cars = 7

they are non-matter

explanation:

they are non-matter. basically, any type of energy or any abstract concept is an example of something that does not matter. other examples include dreams, magnetism, radio, and hate

the word that best describes martin luther king jr.'s tone in the video is dignified

martin luther king, jr. was a social activist and baptist minister who played a key role in the american civil rights movement from the mid-1950s until his assassination in 1968. the video shows his manner and attitude having or showing a composed or serious manner that is worthy of respect so dignified is the correct answer