6. How many positive numbers less than 100 are possible by using the digits 0, 1, 2, 3? If the repetition of the digits is not allowed, how many such numbers are possible? 7. How many even numbers are possible between 2000 and 3000 by using the digits 0, 1, 2, 3, 4, only once? ​

I’m not gonna do that

Ok here we go ..there are plenty of ways to solve such math problems but we will go for the smartest and easiest ..5x+2y=7  -2x+6y=9we rearrange them into the following ..by multiplying the 1st equation by 2 it becomes 10x + 4y = 14we rearrange it and so it becomes 10x = 14 - 4yas for the second equation we multiply it by 5 and rearrange it so it becomes as to the following ..-10x + 30y = 45rearranging so 10x = 30y -45now 10x equals both 14 - 4y and 30y -45so   14 - 4y = 30y -4531 = 26yy= 31/26 = 1.19 or around 1.2so by now we can calculate x easily as  -2x+6y=9so 2x = 6y -9 = 6 * 31/26 - 9 = -1.84  then x = - 0.92 or around -0.9best luck!

Yesbecase if u place it by a famous restaurant your get a better chance of pepole comeing to u

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