Use the distributive property to simplify the expressions. -3(4 - 3p)
-3(7 - 6u)
-6(-1 + 2c)
6(-n + 7)
9(5 + 3c)

Step-by-step explanation:

Do the steps that I did on Problem A for each

A:-3(4-3p)

a=-3, b=4, c=3p

Apply the distributive law:

Add minus - plus rules:

Simplify:

=

B:-3(7-6u)

a=-3, b=7, c=6u

=-3*7+3*6u

Simplify;

=

C:-6(-1+2c)

a=-6, b=-1, c=2c

=-6(-1)+(-6)*2c

=6*1-6*2c

Simplify:

=

D:6(-n+7)

a=6,b=-n,c=7

=6(-n)+6*7

=-6n+6*7

Simplify:

=--6n+42

E;9(5+3c)

a=9,b=5,c=3c

=9*5+9*3c

Simplify:

=45+27c

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: