Given six digits 1, 2, 3, 4, 5 and 6. a) Determine the number of four-digit numbers that can be formed using the digits given

if no repetition is allowed.

b) How many four-digit numbers greater than 4,000 can be formed using the digits given
without repetition?​

4th option is correct xy=-10

if this was to u plzz mark me the brainliest

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10

saving = more money

step-by-step explanation:

if you have 100 bucks, and you want to buy a candy bar, even if you have one at home, if you choose not to buy it, you save.

~courtney