Amber coaches soccer and volleyball. She coaches both sports for a total of 10 hours each day. The soccer practice lasts 1 hour more than twice as long as the volleyball practice.
(a) Write a system of equations to model the situation. Use v for the number of hours Amber coaches
volleyball in a day and s for the number of hours she coaches soccer.
(b) How many hours each day does Amber spend coaching each sport?
Show your work.

A) 10 = v + (2v + 1)

B) Volley ball practice: 3 hours

Soccer practice: 7 hours

a) x+y=10

   x=2y+1

2y+1+y=10

   3y+1=10

       -1   -1

3y=9

y= 3hrs of volleyball

x=2(3)+1

x=7hrs of soccer

b) 7hrs and 3hrs

-2/

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: