What's The Answer? 8-(-12) =

Step-by-step explanation:

8

−

(

−

12

)

Multiply

−

1

by

−

12

.

−

8

+

12

Add

−

8

and

12

.

4

20

because when you subtract a negative number from a positive number its like making the negative number positive and adding them together

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:

they used 313 gallons of paint