Which of the following best describes the solution to the system of equations below? 5x + 8y =7 5x + 8y=14 a. the system of equations has exactly one solution where and . b. the system of equations has exactly one solution where and . c. the system of equations has no solution. d. the system of equations has infinitely many solutions.

Which of the following best describes the solution to the system of equations below? 5x + 8y =7 5x + 8y=14

A. The system of equations has exactly one solution where and .

B. The system of equations has exactly one solution where and .

C. The system of equations has no solution.

D. The system of equations has infinitely many solutions.

Step-by-step explanation:

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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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