4+ 2 + (-7)= ? i have no idea if the place i'm supposed to start on in the number line is -7 so if u could tell me that would thx

-4 + 2 -7 = -9

Im notsure what you are referring to as far as the number line. But, I believe you would start at -4, add 2, then subtract seven on the number line as well.

Hope this helps

19

step-by-step explanation:

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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