Mr huynh wrote the sum 7 fifteens and 38 fifteens on the borad draw a modle and wrte the corrtect expression

We are given statement:  The sum 7 fifteens and 38 fifteens .

Solution: It is said 7 fifteens.

So, 15 is written 7 times, that is

15 + 15 + 15 + 15 + 15 + 15 + 15 .

15 + 15 + 15 + 15 + 15 + 15 + 15  can be written as 7 times 15 or 7× 15.

Then, 38 fifteens.

So, 15 is written 38 this time.

So, 38 fifteens could be written as 38 × 15.

Now, the sum 7 fifteens and 38 fifteens can be written finally as :

7 × 15 + 38 × 15               This is our final expression.

table a is wierd

step-by-step explanation:

6*f

an = 22 + (n-1) *6

110 seats

step-by-step explanation:

an=a1+(n-1)(d)

a1 = 22   this is the first item in the sequence

d =6   this is how the sequence goes up

a)   an = 22 + (n-1) *6

b) a12 = 22 + (12-1) *6

    a12 = 22+11*6

  a12 = 22 +88

  a12 = 110