Describe the equation 23 = 7x + 2 in words. then use pencil and paper to describe a real-world
situation that could be represented by the equation.
which description below matches the given equation?
oa. add 2 to an unknown quantity. multiply the sum by 7. the result is 23.
ob. subtract 7 from 23. divide the difference by 2. the result is an unknown quantity.
oc. multiply an unknown quantity by 7. add 2 to the product. the result is 23.
od. add 7 to 23. divide the sum by 2. the result is an unknown quantity.

Step-by-step explanation:

i think that you subtract 2 and subtract 22 by 2 which is equal 21 ,and than do 21 divide by 7 which is equal 3

The probability is:

                  0. 389

Step-by-step explanation:

We are given a two way frequency table as:

               Humanities   Science      Other      Total

  Male           70                50         60         180

 Female        80                80         70         230

 Total           150              130        130        410    

We are asked to find the probability that a student's first class of the day is a humanities class, given the student is male.

Let A denote the event that a student takes humanities class.

and B denote the event that a student is a male.

Then A∩B denote the event that a  male student takes humanities class.

Also, let P denote the probability of an event.

Hence,

Also,

We are asked to find:

P(A|B)

We know that:

Hence, we have:

         Hence, the probability is:

                 0.389