CPhill

I'm using the convention that the water surface lies at "0"...thus, above the surface is "positive" and below the surface is "negative"...so we have

d = 17 - 10.4m       where d is the depth after m minutes 

The depth after 60 minutes is

17 - 10.4(60)  =  -607   = 607 ft below the surface

LOL !!!

You'd better watch out......Melody will "chomp" down on you......!!!!

Hey.....I invented sunglasses......!!!!!

No doubt about it......!!!!!

Assuming the sides are 3 in......the area of one face is just 3 x 3 = 9 square inches

And there are six of these

Can you take it from there???

LOL!!!! h7......!!!!

Good try, selena......!!!

Let's look at this again

"is" means " = "       "of" means "multiply"        and 4%   = .04        so we have

2 = .04 N      divide both sides by .04

2 / .04 = N

50 = N

NAH.....I have an endless supply of them.....!!!!

3x+4y=11

5x+2y=-5        note that, if we multiply the second equation  by -2 and add it to the first one, we can "eliminate" y

So we have

3x     +   4y = 11

-10x  -    4y = 10

------------------      add

-7x             =  21    divide both sides by -3

x = -3

To find y, just substitute for x in any of the equations......i'll use the first one

3(-3) + 4y = 11

-9  + 4y     = 11    add 9 to both sides

4y  = 20               divide both sides by 4

y = 5

And that's it