Pleaseee helpo me

Student C has the mistake.

Step-by-step explanation:

4y2+5y−8y2+4−2y

=4y^2+5y+−8y^2+4+−2y

Combine Like Terms:

=4y^2+5y+−8y^2+4+−2y

=(4y^2+−8y^2)+(5y+−2y)+(4)

=−4y^2+3y+4  or 3y - 4y^2+4

omg what happend to your question? if you could edit this question i can

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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step-by-step explanation: