AzizHusain

Interesting how something about a xerox machine ended up on this website!

Xerox = xorex = xor rex = zor rex = zor t-rex = czar t-rex = russia dinosaur = country creature = land animal = place living = living place = house = place with appliances = printers/photocopiers, etc. = Xerox!

Happy International Friendship Day, Rosala! 

The one related to the cigarettes and cockroaches is funny. 

Anyway, good to see you again after a week. Also, it is already August now...time is flying by so fast.......and back to deeper "work work" mode soooooon!

(p-q)2 + (q-p)2

(p-q)(p-q) + (q-p)(q-p)

(p² - pq - pq + q²) + (q² - pq - pq + p²)

2p² - 4pq + 2q².

I think you meant to put: How many dimes does she have?

Nickels are 5 cents: 32 nickels*0.05 [5 cents] = $1.60

$2.50 - $1.60 = $0.90

Dimes are 10 cents: 0.10*9 = $0.90 --> Sheila has 9 dimes.

(5x+4)^2

FOIL:

(5x+4)(5x+4)

25x²+20x + 20x + 16

25x² + 40x +16.

Sally = y

Sue = z

y = 200

Before z = 3z, y = 2z

If y = 200, then 2z = 200 --> z = 100 before, now z = 3z = 3(100) = $300.

Convert from verbal to mathematical:

A = 2B (twice as much)

B = 0.5C + C (50% more than C - must add the + C since B earned 50% more than C plus the actual amount C made)

A + B + C = $220,000

By substituting 2B for A, we obtain 2B + B + C = 220,000, then 3B + C = 220,000 --> C = 220,000 - 3B

Then, we substitute for C in B = 0.5C + C --> B = 0.5(220,000 - 3B) + 220,000 - 3B

B = 110,000 - 1.5B + 220,000 - 3B

B = 330,000 - 4.5B

5.5B = 330,000

B = $60,000.

Since the 3 made $220,000 over 3 years...then, on average, B made 60,000 / 3 = $20,000 in any year.

To check: 

A = 2B = 2(60,000) = $120,000

C = 220,000 - 3B = 220,000 - 3(60,000) = 220,000 - 180,000 = $40,000

A + B + C = 220,000?

$120,000 + $60,000 + $40,000 = $220,000...Yes.

210x^2-1680x+7700.

210(6^2) - 1680(6) + 7700 = 5,180.

sqrt(2) = 1.414213562373095.

N = -5000ln(0.085). --> N=12325.520112459102986.