Here you go :   http://www.purplemath.com/modules/distform.htm

12p-7=-3p+8     add 3p to both sides    add 7 to both sides

15p = 15       divide both sides by 15

p = 1

Since the sqrt of 74=8.602........, then a whole closest number to this number would be a 9.

sqrt (81) = 9

sqrt(74) = about 8.6

sqrt(64)  = 8

l -86 l  + 45  =

86  + 45   =

131 ft

Your answer is:

-15

If your cost is greater than your sales, you nave no profit...in this case.....you lose 112 - 98   = $14

Joe can type 11 words in 8 seconds. At this rate, how many words can he type in two minutes?

11/8=1.375 words per second that Joe can type. But 2minutes X 60=120 seconds,

So in 120 seconds Joe can type=120 X 1.375=165 words in 2 minutes, or 165/2=82.5 words per minute!!!. That makes Joe very fast typist!!.

Assuming she didn't spend money on anything else but coffee....3 x $1.29  =   $3.87

15km x 1 mile/.621 km  = 9.315 mi

1L = .264 gallons

So  9.315mi / .264 gal =  35.28 mi/gal

250 - 60 + 115.50 - 42.50 - 35.00  = $228

Since UPS charges $7.00 + .20x pounds, and

Fedex charges $5.00 + .30x pounds, then

7 +.20x=5 + .30x

2=.10x,and

x=2/.10=20 Pounds for UPS & Fedex to cost the same

          18                                                             

A student pipets 5.00 ml of ethanol into a flask weighing 15.25 grams. She finds that the mass of the flask plus ethanol = 19.17 grams. Calculate the density of ethyl alcohol

Density=Mass/Volume

Since the mass of the flask with ethanol=19.17 grams, and without ethanol is 15.25 grams, then the mass of ethanol must be=19.17 - 15.25=3.92 grams. Since, she only had 5.00 ml of ethanol, which is the same as 5.00 cubic centimeters(since 1 ml=1cm^3) of ethanol.

So now we use our Density formula above:

Density=Mass/Volume=3.92g/5cm^3=.784 grams per cubic cm, which is the density of her ethanol. 

Find the effective annual interest rate r of the given annual interest rate. Round your answer to the nearest 0.01%. 2% compounded quarterly

Compounded quarterly means you divide r by 4 & then by a hundred, thus:

2%=2/400=.005, then you add $1 to it so that it becomes=1.005. That's how much interest you earn per quarter.But 1 year=4 quarters, so we have 1.005^4=1.0201505. That's the copounded interest for 4 quarters or for 1 full year. So now, we subract the $1 we added to it & multiply it by 100 to make it into a percentage, thus:1.0201505-1=.0201505 X 100=2.01505%, which is your annual effective interest rate r. And that's how arrive at an effective annual interest rate.

i means imaginary number. i² = -1 and the square root of -1 is i. Remeber that. So -16 is realy just 16* (-)1, the root of 16 is four and the root of -1 is i.

6.7082039324993691

-58

no its a whole number and an integer

THANK YOU! YOUR AN ANGEL FROM HEAVEN!!!!!!

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