Sara goes to the mall every 6th day. Andy goes to the same shopping mall every 7th day. How many times will they meet in the mall in the month of December and January if we start counting from 1st December.

Only once.

Step-by-step explanation:

Given: Sara goes to the mall every 6th day. Andy goes to the same shopping mall every 7th day.

Then, from starting the first day , the number of day when they meet = L.C.M of (6,7)

Since 7 is a prime number , so the least common multiple of 6 and 7 = 6 x 7 = 42

So, every 42th day they will meet.

Both December and January have 31 days.

Starting from 1st December , they will meet on 11th January because 42 = 31 +11 , where 31 days are of December and next 11 days of January.

next time they will meet 42 days after Also 20 + 22 , where 20 remaining days of January and 22 of February, so next time they will meet on 22nd February.

So, they will meet only once at 11th January in the month of December and January .

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.

2.56 is the width of the garden

step-by-step explanation: