How many different arrangements of the letters in the word "ALGEBRA" are there?
2,520
25
1,260
3.5

2,520

Explanation:

The word ALGEBRA has 7 letters with the letter A repeated twice.

Hence we permute all 7 letters with A repeated twice

₇P₇ / 2! = 7!/ [  (2!) ( 7-7)!]

= 2,520

asmr

quish

sluuup

crunch, crunch , crunch

yeahhh

wet,wet,wet

lick,lick,lick

ek = (m·v2) / 2

v - velocity of system after the collision

m = m1 + m2

ek = (m1 + m2) ·v2/2

ek = (200 + 250) ·2,32/2 = 450·5,29/2 = 1190,25 j