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a_sh-v [17]
3 years ago
5

A. B. C. D. please help

Mathematics
1 answer:
Dmitriy789 [7]3 years ago
4 0

Answer:

D

Step-by-step explanation:

-1 + -5 is -6.

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7x+32g-24? Don't count me on that answer.
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Find the real solutions of the equati<br> √7x+1 - √x-5 = 6
Juliette [100K]

The solution of this equation is x = 5 and   x = 9.

<h3>What is the solution?</h3>

Let us recall that what we have here is a radical equation as follows;

√7x+1 - √x-5 = 6

When we isolate we have';

 √7x+1 = √x-5+6

Taking the square of both sides;

  (√7x+1)^2 = (√x-5+6)^2

Hence;

    7x+1 = x-5+36+12√x-5

-12√x-5 = -7x-1+x-5+36

12√x-5 = 6x-30

Raising this equation to power 2

144x-720 = 36x^2-360x+900

When we rearrange we obtain;

36x2  - 504x  + 1620 = 0

Hence;

x = 5 and   x = 9

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5 0
1 year ago
Please help me idk this
vichka [17]

Answer:

\large\boxed{Surface\ Area=63\ cm^2}

Step-by-step explanation:

We have

square  with sides <em>s = 3cm</em>

four triangles with base <em>b = 3cm</em> and height <em>h = 9cm</em>.

The formula of an area of a square:

A_\square=s^2

The formula of an area of a triangle:

A_\triangle=\dfrac{bh}{2}

Substitute:

A_\square=3^2=9\ cm^2\\\\A_\triangle=\dfrac{(3)(9)}{2}=\dfrac{27}{2}=13.5\ cm^2

The Surface Area:

S.A.=A_\square+4A_\triangle\\\\S.A.=9+4(13.5)=9+54=63\ cm^2

5 0
3 years ago
Please help with simplifying 2|-16.75|
klio [65]
First find the absolute value of -16.75. |-16.75|= 16.75

Then multiply that by 2. 16.75x2=33.5

So 2|-16.75| simplified is 33.5
6 0
3 years ago
Read 2 more answers
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