The following box plot shows the number of years during which 20 schools have participated in an inter-school swimming meet at least how many schools have participated for 6 years or more? A: 4
B: 5
C: 10
D: 11​

4 schools

Step-by-step explanation:

Based on the box plot you have given above, the answer would be 20% of the total schools participated for 6 years or more. This is because the part of the box plot wherein it hits 6 years and above is 20%. Thus, if there are 20 schools, then the 20% of it would be 4. In conclusion, there are 4 schools that participated for 6 years or more.

x = -11/4 = -2.750

Step-by-step explanation:

Rearrange:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

                    4*x+9-(-9+7)=0

Step by step solution :

Solving a Single Variable Equation :

1.1      Solve  :    4x+11 = 0

Subtract  11  from both sides of the equation :

                     4x = -11

Divide both sides of the equation by 4:

                    x = -11/4 = -2.750

One solution was found :

                  x = -11/4 = -2.750

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