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Damm [24]
3 years ago
12

Johnny ran at a constant rate of 5.125 miles per hour.If he ran for 2,116 hours, what was his average rate per second

Mathematics
1 answer:
kogti [31]3 years ago
3 0
7,394,050 per second 
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alan bought 3 pencils and a notebook. the notebook cost $6, and he spent a total of $12. how much did each pencil cost?
Step2247 [10]

Answer:

Step-by-step explanation:

3x+6=12

-6. -6

3x=6

Divid three by both sides.

X=2

Each penicillin cost 2 dollars

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3 years ago
Solving the systems of equations by elimination-solo team teach<br><br> x+y=-7 <br> 3x+y=-9
maria [59]

Answer: x= -1, y= -6

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3 years ago
You were told that the amount of time lapsed between consecutive trades on the New York Stock Exchange followed a normal distrib
uysha [10]

Answer:

Step-by-step explanation:

Given that that (X) the amount of time lapsed between consecutive trades on the New York Stock Exchange followed a normal distribution with a mean of 15 seconds.

i.e. X is normal with mean = 15 and unknown std deviation \sigma

Given thatP(X

i.e. P(z

z=-1.475 (from normal table)

Hence \frac{13-15}{\sigma}=-1.475\\\sigma = 1.356

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6 0
3 years ago
Find the length of side AB in the right triangle shown.
Bogdan [553]
Side AB is 72 cm long.



Explanation:

To find the length of side AB you have to use this formula:

{a}^{2}  +  {b}^{2}  =  {c}^{2}

*Remember there are two legs (a and b) and a hypotenuse (c) on a triangle. The longest side will be the hypotenuse and the other two will be the legs. For this triangle the hypotenuse is side BC while the legs are sides CA and side AB.

Plug in the numbers into the equation.


{65}^{2}  +  {b}^{2}  =  {97}^{2}
For this triangle, you were given the hypotenuse (c) and one leg (a). To find the last length solve the equation and balance it so only b is left, like this:

4225 +  {b}^{2}  = 9409

9409 - 4225 = 5184

Soo...

{b}^{2}  = 5184

Then to get the side length, square root 5184.

\sqrt{5184}  = 72

So the length of the last side is 72 cm.
5 0
3 years ago
It costs $200.00 to rent the mini-golf course, plus $7.25 per person. What would be the total cos
igor_vitrenko [27]

$417.50 should be the correct answer you just multiply  the $7.25 to 30 and then add the $200.

7 0
3 years ago
Read 2 more answers
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