Ed is doing a survey of popular colors for cars for a school report . He decides to take a sample by sitting near a busy intersection and noting the colors of the cars as they go by him . Ed counts 23 black cars , 9 red cars , 17 blue cars , 25 white cars and 21 silver cars during 20 minutes of watching . How many more white and blue cars are there than silver and red cars?

step-by-step explanation:

we are given

since, we have to isolate x on anyone side

so, we can move all x terms on one side

subtract both sides by 2x

add both sides by 9

divide both sides by 4

we get

7.25

step-by-step explanation:

we know that 7 equals to 7.0. we also know that 1/4=0.25. so we can add the two together and we get 7.25

the answer is $42.96

step-by-step explanation:

x= cost per bracelet

number of bracelets * x + shipping charge = total cost

so

9x+9=72