Answer:
2962
Step-by-step explanation:
2 8 8 8
+ 7 4
----------------
2 9 6 2
Alright so I'm coming up with this on the fly; you have the first six letters (a,b,c,d,e,f) and 0-9 and your ten numbers. calculate the amount of possible combinations for the letters by simply writing them down.
ab, ac, ad, ae, a f- five
bc, bd , be, bf- four
cd, ce, cf- three
de, df- two
ef,- one.
adding these all together gets a total of 15 for the letters. now the numbers
01, 02, 03, 04, 05, 06, 07, 08, 09- nine
12, 13, 14, 15, 16, 17, 18, 19- eight
23, 24, 25, 26, 27, 28, 29- seven
34, 35, 36, 37, 38, 39- six
45, 46, 47, 48, 49- five
56, 57, 58, 59- four
67, 68, 69- three
78, 79- two
89- one
added together with a total of 45 combinations.
alright so, 45 different number combinations and 15 letter combinations. multiplying 15 by 45 should tell you the total possible combinations for a two letter and two number serial-number
True or false?
ok, so just use your head and use this simple memory tool
for remembering inequalities, the aligator eats the bigger number
x>y means x is biger than y
x<y means x is smaller than y or y is bigger than x
remember: the farther to the right a number is, the bigger it is
8<9
and
-10<-3 since -3 is farther to right than -10
so see them
b. 5>7, duh, false
c. 15≥17, are you kidding me, false
d. true
e. nay, no negative number is ever greater than a positive, false
f. true, -2 is farther to the right than -13 is
g. x>4, x is any number bigger than 4, not including 4
h. x is any number bigger than 8, not including 8
i. x is less than or equal to -4, so it can be -5, or even -4
