Step-by-step explanation:
if negative sign is there we must add and if positive sign is there subtraction should be written there.....
Answer is C: Step 3, because a number has been added only to one side of the equation.
Hope this helps.
Am I opinion the answers either a or B but I’m pretty sure it’s been
Answer:
a)4080 trees
b)104 trees
Step-by-step explanation:
<u>1st - 24 trees</u>
<u>last (40th) - 180 trees</u>
If differences between any row (except 40th) and next row are equal then
<u>2nd - 24 trees+X</u>
<u>3rd - (2nd+X) or 24 trees + 2X</u>
coefficient of X is <u>number of row minus 1</u>, therefore 40th row has <u>24 trees + 39X</u>, and it is equal to <u>180</u>. We can make an equation from this:
<u>24tr+39X=180tr</u>
<u>39X=156tr</u>
<u>X=4tr</u>
By this we can find how many trees are there in the 21st, 21st row has 24 trees+20X=24 trees+80 trees=104 trees
To find how many trees are there in the whole orchard, we add them all:
<u>1st - 24 trees, 2nd - 24 trees + X, 3rd - 24 trees + 2X,</u>
easily, it is just <u>24 trees x 40 + 39X x 20 = 4080 trees</u>
List factors
63-1,3,7,9,21,63
36-1,2,3,6,12,18,36
45-1,3,5,9,15,45
72-1,2,3,4,6,8,9,12,18,24,36,72
Find biggest number in all of them...
The greatest common factor is 3
