Answer:
Step-by-step explanation:
Because order does not matter this is a combination
5!/(2!3!)=10
Answer:
Step-by-step explanation:
7- 4!= 4*3*2*1=24
8- 10C3 = 10!/(3!*(10!-3!) = 120
9- 7 P3 =7!/(7-3)! = 210
In 7th grade:
red-hair students =58
another color hair students =609
In 8th grade:
red-hair students =60
Let's assume
another color hair students =x
now, we are given
The numbers of red-haired students in 8th grade are proportional to the numbers in 7th
so,

now, we can solve for x
we get

we get

so, students have another color hair in 8th grade is 630.........Answer
I could be wrong, but the second option looks correct.
This would be false because it will depend on the actual values of both a and b, including if they are positive or negative.
This is true.
For example :
B = -6
A = -9
A + B = C = -6 + -9 = -15.
The value is C has the same sign as B.
B = 2
A = -5
A + B = -5 + 2 = -3.
Here The sign for C does not match the sign for B, which is positive.