The expression (x-4) is equivalent to which expression below? A 2x - 16
B. x² + 16
c. x. 8x + 16
D X + 8x + 16

B.

X2 +16

Step-by-step explanation:

X2 +16

=(x+4) (x-4)

just needed some points but try socratic

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: