Pls help I’ll brainlest and add extra points ASAP solve it one step equation

1) a-2=10

add +2 to both sides to get a by itself

you get a = 12

2) 1/3n= 13

Make 1/3 into reciprocal 3/1

Multiply 3/1 to both sides

you get n= 39

3)  34= y/2

      Multiply 2 to both sides

      you get y= 68

4)  3/7n= 24

  Make  3/7 into reciprocal  7/3

    Multiply 7/3 to both sides

      you get 56

5)  x+2= 12

        -2   -2

x=  10

a-2=10

  +2  +2

a=12  

1/3n=13

•3     •3

n=39

34= y/2

•2   •2

68=y

3/7n=24

÷3      ÷3

1/7n=8

•7    •7

n=56  

w+2=12

   -2   -2

w=10

Step-by-step explanation:

easy math

this answer is !

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;