Yes, 60 is correct. We have 5 letters in total and the letter, "O" repeats twice, so 5!/2!=5*4*3=20*3=60 ways.
Cross-multiplying, we have 8(n+3)=5n, 8n+24=5n, 8n-5n=-24, 3n=-24, n=-8.
Thank you, CPhill!
Well, that is correct. Read here, for more info: https://cs.uwaterloo.ca/journals/JIS/sommars/newtriangle.html
We have N choose 3, in this case, 12 choose 3, which is 12!/9!*3!=12*11*10/3*2*1=220 triangles. You can add 108 triangles to that.
We have 2x+1=7x-14. Solving, we attain 5x=15, x=3. So, with 2 rows: 2(3)+1=7. Or, with 7 rows: 7(3)-14=21-14, x=7.
Monday: x watermelons
Tuesday: 2x watermelons
Wednesday: 1/2x
Thursday: 18
Friday: 4+2(x+2x)=2(3x)=6x+4
x+2x+1/2x+18+6x+4=60, 9 1/2x=38, 19/2x=38, x=38*2/19, x=2*2=4.
So, 6(4)+4=24+4=28 watermelons.
Tell me if this is correct!
10 1/2 pi. Just tell me if it's correct, then I'll provide a solution.
I have time for number 1.
1. (7x+3)(4x-5)=28x^2-35x+12x-15, 28x^2-23x-15
By reading the title, we have 1 1/4/ 1 3/4= 5/4 / 7/4= 5/4*4/7= 5/7.
1. 15/100x=45, x=45*100/15, x=300.
3. 112%=62720, 1%=560, 100%=56000.
