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2 years ago

Help! (40pts)

Mathematics

1 answer:

Vilka [71]2 years ago

3 0

Answer:

Is only if a Biconditional?

The general form (for goats, geometry or lunch) is: Hypothesis if and only if conclusion. Because the statement is biconditional (conditional in both directions), we can also write it this way, which is the converse statement: Conclusion if and only if hypothesis.

Step-by-step explanation:

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Pls Answer this right away! PLS

LenaWriter [7]

The results of the experiment are shown in the frequency side
a) 14
b) 3600 Best guess 300*12

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2 years ago

6x7-8/4 using the order of operations will reward 10 pts best answer will be marked brainliest.

Phantasy [73]

Answer:

Step-by-step explanation:

6x7-8/4 =42 - 2 = 40

8 0

2 years ago

Evaluate the surface integral. s y ds, s is the helicoid with vector equation r(u, v) = u cos(v), u sin(v), v , 0 ≤ u ≤ 6, 0 ≤ v

Juliette [100K]

Compute the surface element:

$\mathrm dS=\|\vec r_u\times\vec r_v\|\,\mathrm du\,\mathrm dv$

$\vec r(u,v)=(u\cos v,u\sin v,v)\implies\begin{cases}\vec r_u=(\cos v,\sin v,0)\\\vec r_v=(-u\sin v,u\cos v,1)\end{cases}$

$\|\vec r_u\times\vec r_v\|=\sqrt{\sin^2v+(-\cos v)^2+u^2}=\sqrt{1+u^2}$

So the integral is

$\displaystyle\iint_Sy\,\mathrm dS=\int_0^\pi\int_0^6u\sin v\sqrt{1+u^2}\,\mathrm du\,\mathrm dv$

$=\displaystyle\left(\int_0^\pi\sin v\,\mathrm dv\right)\left(\int_0^6u\sqrt{1+u^2}\,\mathrm du\right)$

$=\dfrac23(37^{3/2}-1)$

4 0

2 years ago

If 3 marbles are drawn from a bag of 12 marbles consisting of three red, four white and five blue, without returning them to the

FinnZ [79.3K]

Answer:

The probability of that happening is 1/22

Step-by-step explanation:

In order to find the probability, you need to start by finding the probability for each step. The probability of the first one being red is the number of red marbles divided by the total number of marbles.

3 red / 12 total.

3/12

1/4

Now the chance that the second is white is the total number of white marbles divided by how many are left in the bag.

4 white / 11 left

4/11

Lastly, the chance of the last one being blue is the number of blue marbles divided by the amount of total marbles left after two pulls.

5 blue/ 10 left

5/10

1/2

Now to find the overall probability of all 3 happening, we multiply all 3 probabilities together.

1/4 * 4/11 * 1/2 = 1/22

7 0

2 years ago

F(x)=x cubed +3x squared -6x-8

svlad2 [7]

Answer: x = {-4, -1, 2}

Step-by-step explanation:

q p

F(x) = x³ + 3x² - 6x - 8

$\frac{p}{q} = +/- \frac{1, 2, 4, 8}{1}$

Possible rational roots are: +/- {1, 2, 4, 8}

F(1) = (1)³ + 3(1)² - 6(1) - 8

= 1 + 3 - 6 - 8

= -10 Since the remainder is not 0, then x = 1 is not a root

F(-1) = (-1)³ + 3(-1)² - 6(-1) - 8

= -1 + 3 + 6 - 8

= 0 Since the remainder is 0, x = -1 is a root.

Use synthetic division to find the remaining factor:

x = -1 → x + 1 = 0

-1 | 1 3 -6 -8

| ↓ -1 -2 8

1 2 -8 0

(x + 1)(x² + 2x - 8) = 0

Next, factor the polynomial:

(x + 1)(x + 4)(x - 2) = 0

x + 1 = 0 x + 4 = 0 x - 2 = 0

x = -1 x = -4 x = 2

6 0

2 years ago