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4 years ago

What is 40÷1000+(-15)

Mathematics

2 answers:

Colt1911 [192]4 years ago

7 0

Answer:

-14.96

Step-by-step explanation:

Tresset [83]4 years ago

6 0

Answer:

The anwser is -14.96

Step-by-step explanation:

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corrine works for 8 hours a day sarting 9 am. in 5 days she makes $720. How much money does corring make in one hour?

Artemon [7]

Hello!

First you have to find out how many hours she works

She worked 8 hours a day for 5 days

8 * 5 = 40

Divide this by the money she earned

720 / 40 = 18

The answer is $18 an hour

Hope this helps!

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3 years ago

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cestrela7 [59]

Answer:

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$\frac{1}{5}$

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3 years ago

Isabel drove 864 miles in 12 hours.<br> At the same rate, how many miles would she drive in 7 hours?

lyudmila [28]

Answer:

504 miles

Step-by-step explanation:

Make a proportion

$\frac{864}{12}$ = $\frac{x}{7}$

7/12 is 0.5833, so multiply 864 by that to find the number of miles

864(0.5833) = 504

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3 years ago

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X²+y²-6x+14y-1=0<br> and please show your work so I can learn

Eva8 [605]

Hello there,

I hope you and your family are staying safe and healthy during this winter season.

$x^2 + y^2 -6x+14y-1=0$

We need to use the Quadratic Formula*

$x =\frac{-b+\sqrt{b^2}-4ac }{2a}$ , $\frac{-b-\sqrt{b^2} -4ac }{2a}$

Thus, given the problem:

$a = 1, b=-6, c=y^2+14y-1$

So now we just need to plug them in the Quadratic Formula*

$x=\frac{6+2\sqrt{(-6)^2-4(y^2+14y-1)} }{2}$ , $x=\frac{6-\sqrt{(-6)^2-4(y^2+14y-1)} }{2}$

As you can see, it is a mess right now. Therefore, we need to simplify it

$x=\frac{6+2\sqrt{10-y^2-14y} }{2}$ , $x = \frac{6-2\sqrt{10-y^2-14y} }{2}$

Now that's get us to the final solution:

$x=3+\sqrt{10-y^2-14y}$ , $x=3-\sqrt{10-y^2-14y}$

It is my pleasure to help students like you! If you have additional questions, please let me know.

Take care!

~Garebear

3 0

3 years ago

What is 40÷1000+(-15)​

What is 40÷1000+(-15)