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3 years ago

Only need this one please....

Mathematics

2 answers:

Nataliya [291]3 years ago

7 0

Answer:

Step-by-step explanation:

2(14y-3y+28x+12.2-5y-17.5) = 2(14y - 3y - 5y + 28x + 12.2 - 17.5)

= 2( 6y + 28x - 5.3)

= 2*6y + 28x* 2 - 5.3*2

= 12y + 56x - 10.6

NeX [460]3 years ago

6 0

Answer:

56x+12y-10.6

Step-by-step explanation:

The multiple choice answer is B.

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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

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3 years ago

1.Where is the least change in the amount of money earned?

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30 or 3 and 4 weeks hope this helps

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3 years ago

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Leya [2.2K]

Answer:

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3 years ago

The area of the surface of the swimming pool is 210 square feet. What is the length d of the deep end (in feet)?

luda_lava [24]

The answer is 3.16 ft

The surface area (SA) of the rectangular prism is:
SA = 2lw + 2ld + 2wd

However, the pool is without the top side, so the area of the top side should be excluded from the surface area of the pool. The surface area of the rectangular pool is:
SA = lw + 2ld + 2wd

We know:
SA = 210 ft²
l = 9 ft
w = 10 ft
d = ?

210 = 9 * 10 + 2 * 9 * d + 2 * 10 * d
210 = 90 + 18d + 20d
210 - 90 = 38d
120 = 38d
d = 120/38
d = 3.16 ft

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3 years ago

HELP!!!!ASAP!!!!Anna and Ariana work at after-school child care center. Together they cared for 32 children this week. Anna care

Stolb23 [73]

Answer:

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Step-by-step explanation:

i believe it should be that 99% sure

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3 years ago