The senior class at high school A rented and filled 3 vans and 6 buses with 306 students. High school B rented and filled 1 van and 3 buses wit 144 students. Every van had the same number of students in it as did the buses. Find the number of students in each van and in each bus.

8 students in each van ~ 22 in each bus

Step-by-step explanation:

- Equations:

8v + 8b = 240

4v + b = 54

- Modify:

8v + 8b = 240

8v + 2b = 108

- Subtract and solve for "b":

6b = 132

b = 22 (# of students in each bus)

- Solve for "v":

4v + b = 54

4v + 22 = 54

4v = 32

v = 8 (# of students in each van)

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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step-by-step explanation:

care to share were the trapezoid shown is ?