Which of the following number sentences is an example of the associative property of multiplication? 1. (12 × 3) × 8 = 12 (3 × 8)
2. 6 × 1 = 6
3. 4 × 5 = 5 × 4
4. 20 × (10 + 6) = (20 × 10) + (20 × 6)

It is 1 or 4 i think

Step-by-step explanation:

1. (12 × 3) × 8 = 12 (3 × 8)

Step-by-step explanation:

i did lesson you're welcome!!

start with a line segment pq that we will copy. mark a point r that will be one endpoint of the new line segment. set the compasses' point on the point p of the line segment to be copied. adjust the compasses' width to the point q. the compasses' width is now equal to the length of the line segment pq.

step-by-step explanation:

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.