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2 years ago

6

calculate the surface of each 3D shape below then from the right, drag and drop the correct surface area calculation into the bo

x below with the corresponding shape

1 answer:

Vikentia [17]2 years ago

6 0

Answer:

thy

Step-by-step explanation:

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1/(x+1) - 1/(x+2) = 1/2

katen-ka-za [31]

Please include the instructions; I assume your job is to find the value of x.

<span>1/(x+1) - 1/(x+2) = 1/2 would better be written as

1 1 1
</span><span>-------- - ------------ = ----
x+1 x+2 2

Identify the LCD. It is (x+1)(x+2)(2). Mult. all 3 terms of the equation by this LCD:

2(x+2) - 2(x+1) = 2(x+1)(x+2)

We can factor out the 2 from all terms:

x+2 - x - 1 = x^2 + 3x + 2

Let's move all terms from the left to the right side:

0 = x^2 + 3x + 2 - x - 2 + x + 1

Then x^2 + 3x + 1 = 0. This is a quadratic with a=1, b=3 and c=1.

What is x?

-3 plus or minus sqrt( 9-4(1)(1) ) -3 plus or minus sqrt(5)
x = --------------------------------------------- = ---------------------------------
2 2

I rather expected to obtain an integer value for x.

Why don't you give this problem a try yourself? Suggestion: First mult. every term by 2. This will give you:

2 2
------- - ------- = 1 and this may be slightly easier to work with. Please
x+1 x+2 give it a try: try to find x that satisfies this equation.
Important: note that x cannot equal either -1 or -2.

</span>

8 0

3 years ago

The ratio is 8:9 is the ratio between 0.45 - 0.60?

bagirrra123 [75]

Divide 8 by 9

8 / 9 = 0.888

0.88 is greater than 0.60 so it is not between 0.45 - 0.60

4 0

3 years ago

Solve the quadratic. x^2+8x+3=0

Reil [10]

Factor
find wht 2 numbers add to 8 and multiply to 3
none do

use quadratic formula which can be used when
ax^2+bx+c=0
x= $\frac{-b+/- \sqrt{b^{2}}-4ac }{2a}$

a=1
b=8
c=3

x= $\frac{-8+/- \sqrt{8^{2}-4(1)(3)} }{2(1)}$
x= $\frac{ -8+/- \sqrt{64-12} }{2}$
x= $\frac{ -8+/- \sqrt{52} }{2}$
x= $\frac{ -8+/- 2 \sqrt{13} }{2}$
x= $-4+/- \sqrt{13}$

x= $-4+ \sqrt{13}$ or x= $-4- \sqrt{13}$
aprox x=-7.60555 or x=-0.394449

6 0

2 years ago

Read 2 more answers

What is the discriminant of the quadratic equation

kkurt [141]

The discriminant is b^2 -4ac
a = 1
b = -2
c = 4

discriminant = 4 -4 * 1 * 4 =
4 -16 =
-12
I get MINUS 12 as the answer but that isn't one of the choices.

7 0

2 years ago

Whats the answer to 3,000(6-2) + 3,000

yuradex [85]

The answer is 15000

$3000 \times ( 6 - 2) = 12000 + 3000 = 15000$
3000*6=1800
3000*-2=-6000
18000-6000=12000
12000+3000=15000

8 0

3 years ago