Verona is solving the equation –3 + 4x = 9. in order to isolate the variable term using the subtraction property of equality, which number should she subtract from both sides of the equation?

a: –4
b: –3
c: 3
d: 4

B: -3 thats the correct answer

Option B is correct.

Step-by-step explanation:

We have been given the equation -3 +4x =9.

To isolate the variable term means to separate x so, as to find the its value

She should subtract -3 from both sides after that she will get:

-3-(-3) +4x=9-3

It will become:

-3 +3 +4x=6

On simplification

4x=6

And finally, x=6/4

Therefore, option B is correct.

14

step-by-step explanation:

14 x 3 = 42

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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