A student would like to estimate the proportion of students at his school who have lunch during period 4. To do so,

Mathematics

1 answer:

iren2701 [21]3 years ago

8 0

Answer: sample

Step-by-step explanation:

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What are the 2 factors that multiply 15000 and adds up to 5

s2008m [1.1K]

Ok so there are no real solutions for xy=15000 and x+y=5
there are immaginary solutions though so

xy=15000
x+y=5

x+y=5
y=5-x

x(5-x)=15000
-x^2+5x=15000
0=x^2-5x+15000
quadriacic formula
if ax^2+bx+c=0, then
x= $\frac{-b+/- \sqrt{b^{2}-4ac} }{2a}$

x^2-5x+15000
a=1
b=-5
c=15000
x= $\frac{-(-5)+/- \sqrt{(5)^{2}-4(1)(15000)} }{2(1)}$
x= $\frac{5+/- \sqrt{25-60000} }{2}$
x= $\frac{5+/- \sqrt{-59975} }{2}$
x= $\frac{5+/- 5i\sqrt{2399} }{2}$
so the numbers are
$\frac{5+ 5i\sqrt{2399} }{2}$ and $\frac{5- 5i\sqrt{2399} }{2}$

3 0

3 years ago

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A manufacture of skateboards offered a 5/2/1 chain discount too many customers. Bobs sporting goods ordered 20 skateboards for a

Thepotemich [5.8K]

A discount string 5/2/1 means the following:
1) Apply 5% discount to the original price.
2) Apply 2% discount to the result of step 1).
3) Apply 1% discount to the result of step 2).
We have then that the result will be given by:
625 * (0.95) * (0.98) * (0.99) = 576.05625 $
Then, the price of each skateboard is:
(576.05625) /20=28.8028125 $
Answer:
The net price of the skateboards was:
28.8028125 $

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3 years ago

You have $4.55 made up of an equal number of pennies, nickles, dimes, quarters and half dollars. How many of each coin do you ha

Papessa [141]

So...

You have 16 quarters. 5 dimes. And 1 nickel. (Half dollars are 2 quarters put together)

I hope this helps!

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3 years ago

What is the area of a triangle with a base of 10 cm and a height of 4 cm?

Alekssandra [29.7K]

Answer:

20 cm

Step-by-step explanation: