HI could someone help me with this question? Thank you very much

A tip: Just solve & solve it, you will end up having solution.

At first,

On comparing, we can say that,

Put e = f - 10 in 4e = 9f

Put f = -8 in equation(i) to find the value of e;

And finally we have got f = -8 & e = -18, now let procede futher;

Thus, our final answer is 180.

a² + b²= c²

24² + 7² = c²

c= 25

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.

click to let others know, how is it

0.0

0 votes

1

report

read more on -

step-by-step explanation: