What is the solution to the following system using substitution or elimination: y= 3x + 7 y= 2x - 3
A. (-2,1)
B. (-2, 7)
C. (1,10)
D.(1, -4)

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:

nope.   happens to me as well.

-aparri

a c

step-by-step explanation:

can you complete your sentence? i could !