Answer:
X=6,x=-2
Step-by-step explanation:
To solve this question we will have to follow the step by step procedure
(x-6)(x+2)
x^2+2x-6x-12
Let's continue
x^2-4x-12
Let's factorise
x^2-6x+2x-12
x(x-6)+2(x-6)
(x-6)(x+2)
so to solve further that is to get the value for x
x-6=0
Add 6 to both sides
x=6
x+2=0
Substrate 2 from both sides
x=-2
Therefore x=6,x=-2
Well the volume of dirt she needs to remove is equal to length*width*height=6.2*4.9*0.225=6.8355
Now let's find how many bags she needs.
To solve for this, simply divide room in bags from total room.
6.8355/0.87=7.857
Thus Zoe has barely enough, but enough bags.
Step-by-step explanation:
Solution file attached
20 = 2 x 2 x 5
15 = 3 x 5
common divisor (CD) of 20 and 15 is 5 so n should be 5 and each group has 4 boys and 3 girls.
If there are more than one CD, then there are more than one answer.
If they ask for the largest number of groups, greatest common divisor (GCD) will be the answer.