Can anyone plz explain the permutation formula in math? and plz make it simple because I'm just a 7th grade student

Mathematics

1 answer:

mixas84 [53]3 years ago

7 0

Answer:

To calculate permutations, we use the equation nPr, where n is the total number of choices and r is the amount of items being selected. To solve this equation, use the equation nPr = n! / (n - r)!.

You might be interested in

Write an equation of a line that is parallel to y = 3x – 5 and goes through the point (3, 1).

scoray [572]

Paralell means has same lsope
y=mx+b
m=slope

given
y=3x-5
slope=3

y=3x+b
find b
(3,1)
x=3
y=1
sub and find b

1=3(3)+b
1=9+b
minus 9 both sides
-8=b

y=3x-8 is equation

5 0

3 years ago

Which triangles in the diagram are congruent?

GenaCL600 [577]

Answer: triangle 1, triangle 2, and triangle 3

Step-by-step explanation:

Triangles 1 and 3 are congruent by SAS. So, by CPCTC, all three sides are congruent, making triangle 2 congruent to them as well by SSS.