<span>Well 68/80 as a percent is 85 % .I got that by dividing 68 by 80 and them multiplying by 100. 100-85= 15. So therefore the dress decreased in price by 15%. </span>
Answer: The number of different combinations of 2 vegetables are possible = 15 .
Step-by-step explanation:
In Mathematics , the number of combinations of selecting r values out of n values = ![^nC_r=\dfrac{n!}{r!(n-r)!}](https://tex.z-dn.net/?f=%5EnC_r%3D%5Cdfrac%7Bn%21%7D%7Br%21%28n-r%29%21%7D)
Given : Number of available vegetables = 6
Then, the number of different combinations of 2 vegetables are possible will be :
![^6C_2=\dfrac{6!}{2!(6-2)!}=\dfrac{6\times5\times4!}{2\times4!}=15](https://tex.z-dn.net/?f=%5E6C_2%3D%5Cdfrac%7B6%21%7D%7B2%21%286-2%29%21%7D%3D%5Cdfrac%7B6%5Ctimes5%5Ctimes4%21%7D%7B2%5Ctimes4%21%7D%3D15)
Hence , the number of different combinations of 2 vegetables are possible = 15 .
8x+15=7
In the statement the phrase the sum of can tell you that it is going to be an addition problem. So 8x ( eight times a number) would be added to the 15, 8x+15. Since its an addition problem the part where it says ' ... is seven', you know that it will all equal 7. So the answer would be 8x+15=7.