PLS HELP -8+13+(-13)!!!!

Answer:

the answer is the third one

• Increase the shape 3 times its original size.

Answer:

To learn one must experiment and leave their comfort zone

- Sun tzu (probably)

So, by a scale factor of 3 it simply means multiply the size by 3.

Answer:

circle with centre (-2, 4) and radius 6

Step-by-step explanation:

x² + 4x +y² - 8y = 16

complete the square for x² + 4x:

(x + 2)² = x² + 4x + 4. we have 4 more than the original. so we subtract 4.

we now have (x + 2)² -4 + y² - 8y = 16.

add 4 to both sides:

(x + 2)² + y² - 8y = 20

complete the square for y² - 8y:

(y - 4)² = y² - 8y + 16. we have 16 more than the original. so we subtract 16.

we now have (x + 2)² + (y - 4)² - 16 = 20

add 16 to both sides:

(x + 2)² + (y - 4)² = 36

(x + 2)² + (y - 4)² = 6²

this is the circle with centre (-2, 4) and radius 6

The length of the tape is 3 and it is divided into equal parts or groups. The length of each group is 1/4. This means that the number of groups in 3(the tape) would be

3÷1/4

We can hold 3 and flip the fraction, 1/4. If we flip 1/4, it becomes 4/1 and the division sign becomes multiplication. The expression would be

3 x 4/1 = 12

The correct option is A

Answer:

marks obtained /maximum marks × 100 = X%

The value of the x in the circle is 17.

'

The angle measure of the central angle is congruent to the measure of the intercepted arc.

Therefore, let's find the value of x.

Hence,

180 - 3x(angle on a straight line) = 7x + 10

180 - 3x = 7x + 10

add 3x to both side of the equation

180 - 3x = 7x + 10

180 - 3x + 3x = 7x + 3x + 10

180 = 10x + 10

180 - 10 = 10x

170 = 10x

x = 170 / 10

x = 17

Therefore,

x = 17

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Answer:

The answer is "\(0.45 \pm 0.18204\)"

Step-by-step explanation:

For the +4 sample proportion\(= \frac{(7+2)}{(16+4)} = \frac{9}{20} = 0.45\)

Sample percentage measurements estimated stdev

\(= \sqrt{\frac{[(0.45)(1-0.45)]}{[(16+4)]}}\\\\ = \sqrt{\frac{[(0.45)(0.55)]}{[(20)]}}\\\\ = \sqrt{\frac{0.2475}{20}}\\\\= \sqrt{0.012375}\\\\=0.111\)

Calculating the critical z for a=0.1, two-tailed = 1.64

Calculating the confidence interval:

\(= 0.45 \pm 0.111 \times 1.64 \\\\= 0.45 \pm 0.18204\)

The standard deviation is 1.0319

x values between 10.4681 and 12.5319 are respectively ( 11 , 12 )

The probability that the number of granite specimens selected for analysis is within 1 standard deviation of its mean value is 0.6740

We are given that: a geologist has collected 14 specimens of basaltic rock and 14 specimens of granite.

Thus total rocks = N = 14 +14 = 28

The geologist instructs a laboratory assistant to randomly select 23 of the specimens for analysis.

Thus sample size = n = 23

Part a) What is the pmf of the number of granite specimens selected for analysis?

x = the number of granite specimens selected

Thus M = Number of granite specimens = 14

Thus x can have the following values:

x n-x = 23-x

9 14

10 13

11 12

12 11

13 10

14 9

We can select a minimum 9 granite specimens, so that total becomes 9 granite specimens + 14 basaltic rock = 23

and maximum 14 granite specimens, so that total becomes 14 granite specimens + 9 basaltic rock = 23

Here x = the number of granite specimens selected follows Hypergeometric distribution with parameters N = 28 ,M=14 , n = 23 .

P(X=9) =0.02037

Similarly, we find all next probabilities:

x P(x)

9 0.0204

10 0.1426

11 0.3370

12 0.3370

13 0.1426

14 0.0204

Part b) What is the probability that all specimens of one of the two types of rock are selected for analysis?

the probability that all specimens of one of the two types of rock are selected

That is:

P( All 14 are granite specimens and rest 9 are basaltic rock OR All 14 are basaltic rock and rest 9 are granite specimens)=......?

That is:

P( 14 granite specimens , 9 basaltic rock OR 14 basaltic rock , 9 granite specimens) =......?

From above table in part a) , we have:

P( 14 granite specimens) = 0.0204 , that means

P(14 granite specimens , 9 basaltic rock) = 0.0204

and

P( 9 granite specimens)=0.0204

That is:

P( 14 basaltic rock , 9 granite specimens) = 0.0204

Thus

P( 14 granite specimens , 9 basaltic rock OR 14 basaltic rock , 9 granite specimens) =0.0204 + 0.0204

P( 14 granite specimens , 9 basaltic rock OR 14 basaltic rock , 9 granite specimens) = 0.0408

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By Angle-Angle-Side (AAS) triangle congruence theorem we know that two triangles are congruent if they have two sets of congruent angles and a set of non-included congruent sides.

Since no figure is given in the question we employ the reflexive characteristic to demonstrate that the overlapping sections are congruent in order to demonstrate that overlapping triangles are congruent.

If two triangles are precisely the same size and shape—that is, if they have the same side lengths and angle measurements—they are said to be congruent. If we are aware that two triangles have all the same sides and angles, we can conclude that the triangles are congruent.

To demonstrate that two triangles are congruent, however, we don't necessarily need to know that all of their sides and angles are congruent.

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In relation to the angle L of the right triangle the sides are as follows:

A right angle triangle is a triangle that has one of its angles as 90 degrees.  The sides of a right angle triangle can be named according to the position of the angles in the right angle triangle.

The sides of a right triangle can also be solved by using Pythagoras's theorem or trigonometric ratios.

Let's identify the sides  j,  k, and I in relation to angle L in terms of opposite, adjacent, and hypotenuse.

Therefore,

The hypotenuse side is the longest side of a right triangle.

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Answer:

Lucas has 16 chocolate bars

Step-by-step explanation:

Let x = number of chocolate bars Lucas has

⇒ x - 2 = number of chocolate bars Caidon has

If they have 30 chocolate bars altogether then:

⇒ x + x - 2 = 30

⇒ 2x - 2 = 30

⇒ 2x = 32

⇒ x = 16

Therefore, Lucas has 16 chocolate bars (and Caidon has 14 chocolate bars).

Answer:

False

Step-by-step explanation:

3x9=27

27^2=729

279=188

The numbers dont match.

Hence, the equation is false.

Answer: False

Step-by-step explanation:

3×9^2=188

Calculate 9 to the power of 2 and get 81.

3×81=188

Multiply 3 and 81 to get 243.

243=188

Compare 243 and 188.

False

The angle measure explained in the solution.

Given that, a || b, we need to find the missing angles,

∠1 = 42° [vertically opposite angles]

∠3 = 62° [vertically opposite angles]

∠2 = 180°-(∠1+62°) [angle in a straight line]

∠2 = 76°

∠4 = ∠2 [vertically opposite angle]

∠4 = 76°

∠4 = ∠9 = 76° [alternate angles]

∠9 = ∠12 = 76° [vertically opposite angle]

∠3 = ∠ 6 = 62° [alternate angles]

∠ 6 = ∠7 = 62° [vertically opposite angle]

∠3 + ∠5 = 180° [consecutive angles]

∠5 = 118°

∠5 = ∠8 = 118° [vertically opposite angle]

∠4 + ∠10 = 180° [consecutive angles]

∠10 = 104°

∠10 = ∠11 [vertically opposite angle]

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Answer:

0.67

Step-by-step explanation:

The probability that the event will not happen is 1 - 0.33 and that is 0.67

The measures of ∠ ABC = 81° and ∠ FEC = 90°

A common property of all kinds of triangles is the angle sum property. The angle sum property of triangles is 180°. This means that the sum of all the interior angles of a triangle is equal to 180°.

Given that, BE is the median of Δ ABC, m ∠ ABE = 40°30

40°30 = 40°+30/60° = 40.5°

Since, BE is the median so, AE = EC and m ∠ ABE = m ∠ CBE

m ∠ ABE = m ∠ CBE = m ∠ ABC → By angle sum postulate

m ∠ ABC = 40.5°*2 = 81°

Since, AB = BC, then m ∠ A = m ∠ C → {angles opposite to equal sides are equal}

In Δ ABC, let m ∠ A = m ∠ C = x

x + x + m ∠ ABC = 180°

2x = 180° -  81°

2x = 99°

x = 49.5°

Therefore,  m ∠ A = m ∠ C =  49.5°

In Δ CBE,

m ∠ BCE + m ∠ CBE + m ∠ BEC = 180°

49.5° + 40.5° + m ∠ BEC = 180°

m ∠ BEC = 180° - 90°

m ∠ BEC = 90°

Now,

m ∠ BEC + m ∠ FEC = 180° → by linear pair sum

m ∠ FEC = 180° -  90°

m ∠ FEC = 90°

Hence, The measures of ∠ ABC = 81° and ∠ FEC = 90°

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Answer:

5.6km

Step-by-step explanation:

Using proportion,

Scale: 5cm = 3.5km

Here:. 8cm = xkm

Where, x is an unknown

Cross multiply

x·5 = 3.5·8

Divide both sides by 5

(x·5) / 5 = (3.5·8) / 5

Therefore x = 3.5 * (8/5)

x = 3.5 * 1.6

x = 5.6km

Therefore the two town are 5.6km apart.

Answer:

5 ≤ L ≤ 35

Step-by-step explanation:

Let w represent the width of the rectangle.

The perimeter (P) of the rectangle is given by:

P = 2w + 2L

Where L is the length of the rectangle.

We know that w = 30 cm and that the perimeter is between 100 and 160 cm. We can now set up our compound inequality:

100 ≤ 2(30) + 2L ≤ 160

100 ≤ 90 + 2L ≤ 160

10 ≤ 2L ≤ 70

We can now divide both sides by 2 to solve for L:

5 ≤ L ≤ 35

Therefore, the compound inequality that represents the graph of a rectangle with a width of 30 centimeters and a perimeter of 100 centimeters to 160 centimeters is:  5 ≤ L ≤ 35

Let's take a look at our triangle:

Using the pythagorean theorem, we'll have that:

Solving for h,

This way, we can conlcude that the missing side measures 20 units.

Answer:

its perpendicular

Step-by-step explanation:

A. C

B. C

C. 15 and 26.

Answer: is 126 degrees

Step-by-step explanation:

Answer:

0.75p=c

Step-by-step explanation:

Answer:

y = 1/2x + 7

Step-by-step explanation:

y = mx+ b

y = 5

x = -4

5 = 1/2(-4) + b

5 = -2 + b

7 = b

Answer:

Triangle

Step-by-step explanation:

It has three side unlike the others can't have three sides

Hello!

The absolute value of any number, negative or positive, is always positive.

That's because the absolute value of a number is the number's distance from zero.

Therefore, the absolute value of 56 is 56.

Hope that helps! :)

-art lover

Answer:

$117

Step-by-step explanation:

Given that:

They buy these books for $105 each and sell them to unsuspecting undergraduates at $222 each

Marginal Profit = Marginal Revenue – Marginal Cost.

Marginal Profit = $222 - $105

Marginal Profit = $117

the marginal profit for a single elementary statistics book $117

For the remaining unsold books in the middle of the semester he bundles them up and sells to vendor in another country for $40 each for which he suffers a marginal loss of $105 - $40 = $65 each

The missing value for the quadratic function is given as follows:

y = -3.

As a function of it's roots x* and x**, the quadratic function is defined as follows:

y = a(x - x*)(x - x**)

In which a is the leading coefficient.

The roots of the function are the values of x when y = 0, hence:

x* = -4, x** = -2.

Thus:

y = a(x + 4)(x + 2)

y = a(x² + 6x + 8).

When x = 0, y = -8, hence the leading coefficient a of the function is given as follows:

8a = -8

a = -1.

Hence:

y = -x² - 6x - 8;

The missing value is the value of y when x = -1, hence:

y = -(-1)² - 6(-1) - 8

y = -3.

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