2 (a-b) does not equal (a-b)^2 is your wrong turn
(b^2-2ab+a^2) / 2(a-b) =
(b-a)^2 / (2(a-b) =
(b-a)^2 /(-2(b-a)) =
(b-a) / -2 =
(a-b)/2
1/2 (a-b)
2 parts + 4 parts + 5 parts + 1 part = 12 parts total of which 4 parts are sand
4 out of 12 or 4/12 sand out of 6.5 cubic meters 4/12 x 6.5 =
4/12*6.5 = 2.167 cubic meters of sand
If we use your numbers the time required will be 60/50 x 3 = 3.6 minutes
If the car is traveling 60 km.hr 2.3 km should only take 2.3 minutes.......what gives?
There is nothing given here to 'solve'....this is the equation of a LINE in the form of y = mx + b
where m (-1/3) is the slope and b (7) is the y-axis intercept (when x=0)
Another way:
\(\sum_{1}^{50}\) 20 + 2(n-1) = 3450 seats
We will be glad to help you ....but you need to give us more information.....what did you leave out? An angle? Shadow lengths? Something?
3^1 = 3
3^2 = 9
3^3 = 27
3^4 =81
3^5 = 243
3^6 = 729
3^7 =2187
3^8 = 6561
3^9 =19683
3^10=59049
You might be able to see a pattern of last digits happening here? (repeating every four?)
2046 mod 4 = 2 The second one above is 9 I expect 3^2046 ends in 9.
ANYTHING divided by ZERO is an error...it is undefined and not allowed.
Updated perspective: If we can keep the disciminant (b^2-4ac) from being ZERO or a perfect square the quadratic will not have integer roots...... I tried to 'brute force' my way through the combinatins, but it was tedious (kept running in to integer roots)....there must be another way...an Excel spreadsheet would be nice ! LOL
