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nikdorinn [45]
3 years ago
12

Factor 5x2+10x-15 , please lend a helping hand if you will.

Mathematics
1 answer:
Usimov [2.4K]3 years ago
3 0
The correct answer is:  [B]:  " (x + 3)(5x - 5) " .
_________________________________________________________
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Find the exact surface area of the following. The exact surface area is
Nataliya [291]

Answer:

Surface area: 4323pi

Fill the box with the value "4323", as there is a "pi" after the box.

Step-by-step explanation:

We need to find the surface area of the cone (without the base) and the surface area of the semi sphere (without the base).

The surface area of the cone, without the base, is:

S1 = pi * r * s

Where s is the slant height.

To find s, we can use the Pythagoras' theorem with the radius and the height:

s^2 = h^2 + r^2

s^2 = 56^2 + 33^2 = 4225

s = 65

So the surface area is:

S1 = pi * 33 * 65 = 2145pi

Now, to find the surface area of the semi sphere, we just need to find half of the surface area of a sphere:

S2 = (1/2) * 4 * pi * r^2

S2 = 2 * pi * 33^2 = 2178pi

Finally to find the total surface area we just need to sum both surface areas:

S = S1 + S2 = 2145pi + 2178pi = 4323pi.

As after the box to answer there is a pi, we just need to fill the box with the value "4323"

7 0
3 years ago
Help me with this question
astraxan [27]
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7 0
3 years ago
Read 2 more answers
Use the IVT to prove that one solution to <img src="https://tex.z-dn.net/?f=x%5E%7B3%7D%20%2Bx-5%3D0" id="TexFormula1" title="x^
Dafna11 [192]

Let <em>f(x)</em> = <em>x</em>³ + <em>x</em> - 5. <em>f(x)</em> is a polynomial so it's continuous everywhere on its domain (all real numbers). Since

<em>f</em> (1) = 1³ + 1 - 5 = -3 < 0

and

<em>f</em> (2) = 2³ + 2 - 5 = 5 > 0

it follows by the intermediate value theorem that there at least one number <em>x</em> = <em>c</em> between 1 and 2 for which <em>f(c)</em> = 0.

7 0
3 years ago
1/(x+1) + 1/a(x+1) find the lcm​
azamat

Answer:

See below.

Step-by-step explanation:

1/(x + 1) consists of 1 factor, 1/(x + 1)

1/[a(x + 1)] consists of two factors, 1/a and 1/(x + 1)

The LCM is 1/[a(x + 1)]

The LCD is a(x + 1)

5 0
3 years ago
A box contains 10 transistors, 4 of which are defective. If 3 are sold at random, find the probability that exactly 1 are defect
Readme [11.4K]
I'd say around 10%
4 out of 10 = 40%
3 out of the 10 are sold = 30%
1 out of the 3 might be bad = 10%
I may be wrong.
3 0
3 years ago
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