In an experiment, Seth was given a substance known as ammonium carbonate, (NH4)2CO3. Seth connected a bunsen burner to the gas valve using a gas hose. He turned on the gas valve and lit the bunsen burner. Using a test tube, Seth heated a piece of ammonium carbonate. Seth noticed the following:
- Condensation appeared on the sides at the top of the test tube.
- An ammonia smell was coming from the test tube.
Seth continued to light a wooden splint and stick it down the test tube and it immediately was extinguished.

Throughout this experiment, how many signs of chemical changes were observed and actual chemical changes took place?
A) 4
B) 5
C) 6
D) 7

Answer:

5[tex]\frac{+}{-} \sqrt{35}[/tex]

Let's solve your equation step-by-step.

x^2−10+25=35

Step 1: Simplify both sides of the equation.

x^2+15=35

Step 2: Subtract 15 from both sides.

x^2+15−15=35−15

x^2=20

Step 3: Take square root.

x=±√20

Answer:

As i can help you the answer is

Step-by-step explanation:

-13+(-56)÷14÷9=-13.4444444 so i goes on countinusly

-16•3-(-36)÷12= -13.3 so these are the answers and mark me as a brainliest

It’d be 12 because you have to divide 132 by 11

Answer: 12 feet.

Step-by-step explanation:

The formula used to calculated the area of a rectangle is:

[tex]A=l*w[/tex]

Where "l" is the lenght and "w" is the width.

You need to find the lenght of the bedroom, then you must solve for the lenght "l":

[tex]l=\frac{A}{w}[/tex]

You know that the floor of Paul's and Matthew's rectangular bedroom has an area of 132 square feet and its width is 11 feet. Then, you can substitute these values into [tex]l=\frac{A}{w}[/tex] to calculated the lenght. Therefore, the result is:

[tex]l=\frac{132ft^2}{11ft}[/tex]

[tex]l=12ft[/tex]

b is the correct answer it's the only 9ne that fits

Answer:

5/10 or 1/2 because there is 10 marbles in total so denominator is 10 and we are pulling white marbles and there is 5 (so what ever the variable is for this case it is the white marbles that would be the numerator so 5/10)

Hope this Helps :D

Answer: white marble: you have a 5/10% chance

               Black marble: you have a 5/9% chance

Step-by-step explanation:

for the white marble you have 5 out 10 because there are half and half then you have to add them all up for the total and not placing it back in the bag there are only 9 left with still 5 black ones so you have a 5 out 9 chance to get a black one

the slope is -3 and the y intercept is -2

Answer: i believe your answer is (80/99)

Step-by-step explanation:0.8080... repeating is a fraction. It is a fraction in decimal form rather than in the form of a ratio. However, that does not stop it being a fraction.In rational form, it is 80/99.

I hope i helped :)

[tex] \frac{80}{99} [/tex]

[tex]x = 0.808080[/tex]

[tex]100x = 80.808080[/tex]

[tex]99x = 80[/tex]

[tex]x = \frac{80}{90}[/tex]

To estimate the difference between 10 1/9 and 5 14/15, we round them to the nearest whole numbers, 10 and 6, respectively, and then subtract to get an estimated difference of 4.

To estimate the difference between the two numbers 10 1/9 and 5 14/15, we can round them to easier numbers to subtract. 10 1/9 is approximately 10, and 5 14/15 is close to 6 because 14/15 is almost a whole number. Now, we can simply subtract 6 from 10.

10 - 6 = 4

So, the estimated difference between 10 1/9 and 5 14/15 is about 4.

Answer:

16=8x2

I hope this helps you!!

The possible values of the lengths and widths of the rectangle are (16, 1) and (8, 2).

We know the perimeter of any 2D figure is the sum of the lengths of all the sides except the circle and the area of a rectangle is the product of its length and width.

We know the area of a rectangle is (length×width).

Given, The area of the rectangle is 16 square units.

Therefore, (length×width) = 16.

So, the possible dimensions are multiples of 16 which is,

(length, width) = (16, 1) (8, 2).

(4, 4) is not admissible as it would make it a square.

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Answer:

-216

(-6)^3

Step-by-step explanation:

-6 * (-6*-6)

-6 * 36

-216

or

-6 * -6 *-6

This is -6 multiplied together 3 times

(-6) ^3

[tex]32a ^{ \frac{9}{2} }b^{ \frac{7}{2} } [/tex]

bad cropping, but there it is. i suggest using an app called photo math if youre having trouble. it shows you the step by step process

We are given that the cost of each shirt = $12.25

It is given that she bought total 'x' shirts, each of cost $12,25.

So, the cost of 'x' shirts is  dollars

Also, there is a shipping charge of $3.99

So, the total cost of 'x' shirts is

Since, the shirts cost her total $77.49.

We have the equation,

12.25x + 3.99 = 77.49

Answer: 5000 cm is greater than 5 m

Step-by-step explanation:

When you convert 5000 cm to m 5000 cm is equal to 50 m so 5000 cm is greater than 5 m

Answer: The answer to your question is infinitely many solutions

Step-by-step explanation: There is two solutions to the system of equations, which means there is complex solutions, or in other words many solutions. And when you have more than one solution, you have infinitely many solutions. Hope this helps:)

And please mark my answer the brainliest

Answer:

Order of a matrix is determined by the number of rows and columns the matrix consists. For example if a matrix is 2 X 5 matrix where 2 is the number of rows and 5 is the number of columns then the order of the matrix is 2 X 5.

I think the answer is B. Cylinder

A lateral surface and two circulars bade is a cylinder.

We have given that,

A. Prism

B.cylinder

C.sphere

D.cone

We have to determine the

A lateral surface and two circulars bade,

A cylinder has traditionally been a three-dimensional solid, one of the most basic curvilinear geometric shapes. Geometrically, it can be considered as a prism with a circle as its base.

The most precise name for the space figure with the given properties

A lateral surface and two circulars bade is a cylinder.

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Simplifying

3x2 + 5x + -7x + 3 + -5x2 + 2 = 0

Reorder the terms:

3 + 2 + 5x + -7x + 3x2 + -5x2 = 0

Combine like terms: 3 + 2 = 5

5 + 5x + -7x + 3x2 + -5x2 = 0

Combine like terms: 5x + -7x = -2x

5 + -2x + 3x2 + -5x2 = 0

Combine like terms: 3x2 + -5x2 = -2x2

5 + -2x + -2x2 = 0

Solving

5 + -2x + -2x2 = 0

Solving for variable 'x'.

Begin completing the square. Divide all terms by

-2 the coefficient of the squared term:

Divide each side by '-2'.

-2.5 + x + x2 = 0

Move the constant term to the right:

Add '2.5' to each side of the equation.

-2.5 + x + 2.5 + x2 = 0 + 2.5

Reorder the terms:

-2.5 + 2.5 + x + x2 = 0 + 2.5

Combine like terms: -2.5 + 2.5 = 0.0

0.0 + x + x2 = 0 + 2.5

x + x2 = 0 + 2.5

Combine like terms: 0 + 2.5 = 2.5

x + x2 = 2.5

The x term is x. Take half its coefficient (0.5).

Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.

+ 0.25 + x2 = 2.5 + 0.25

Combine like terms: + 0.25 = 1.25

1.25 + x2 = 2.5 + 0.25

Combine like terms: 2.5 + 0.25 = 2.75

1.25 + x2 = 2.75

Factor a perfect square on the left side:

(x + 0.5)(x + 0.5) = 2.75

Calculate the square root of the right side: 1.658312395

Break this problem into two subproblems by setting

(x + 0.5) equal to 1.658312395 and -1.658312395.

Subproblem 1

x + 0.5 = 1.658312395

Simplifying

x + 0.5 = 1.658312395

Reorder the terms:

0.5 + x = 1.658312395

Solving

0.5 + x = 1.658312395

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-0.5' to each side of the equation.

0.5 + -0.5 + x = 1.658312395 + -0.5

Combine like terms: 0.5 + -0.5 = 0.0

0.0 + x = 1.658312395 + -0.5

x = 1.658312395 + -0.5

Combine like terms: 1.658312395 + -0.5 = 1.158312395

x = 1.158312395

Simplifying

x = 1.158312395

Subproblem 2

x + 0.5 = -1.658312395

Simplifying

x + 0.5 = -1.658312395

Reorder the terms:

0.5 + x = -1.658312395

Solving

0.5 + x = -1.658312395

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-0.5' to each side of the equation.

0.5 + -0.5 + x = -1.658312395 + -0.5

Combine like terms: 0.5 + -0.5 = 0.0

0.0 + x = -1.658312395 + -0.5

x = -1.658312395 + -0.5

Combine like terms: -1.658312395 + -0.5 = -2.158312395

x = -2.158312395

Simplifying

x = -2.158312395

Solution

The solution to the problem is based on the solutions

from the subproblems.

x = {1.158312395, -2.158312395}

Answer:

144%

Step-by-step explanation:

36/25= 1.44

1.44 x 100

Answer:144%

Step-by-step explanation:

To write 36/25 as a percent you have to remember that 1 equal 100% and that what you need to do is just to multiply the number by 100 and add at the end symbol % .

36/25 * 100 = 1.44 * 100 = 144%

Hope it helps

Answer:

D

Step-by-step explanation:

Answer D is correct.  The indicated line segments are both radii of the circle and are thus of the same length (and thus, congruent).

Answer: D. RE

Step-by-step explanation:

In the given picture , we have a circle with center R having two chords as WF and MU.

The two chords WF and MU have equal length.

i.e. [tex]WF=MU=11.2[/tex]

We know that the equal chords of a circle are equidistant from the center.

⇒ [tex]\overline{RA}=\overline{RE}[/tex]

Therefore, we conclude that RA is congruent to RE.

Answer: 1. A Please give me a thanks and a brainly

Step-by-step explanation:

Answer:

Step 3 is wrong.

Step-by-step explanation:

They must subtract the 28 from 15 first. This will give you 3x=-13. Then, you divide each side by 3, giving an answer of x=-4.33, or x=-13/3.

Answer:

step 3 is wrong

Step-by-step explanation:

consider step 2

3x + 28 = 15 ( subtract 28 from both sides ) gives

3x = 15 - 28

3x = - 13 ← what step 3 should be

Answer: C 18000

Step-by-step explanation:

Julie contributes $12,000 to her 401k and her employer matches 50% of this amount, contributing an additional $6,000. Thus, the total balance in Julie's 401k after the employer's contribution is added is $18,000.

The question involves calculating the total balance in Julie's 401k account after her employer's contribution. Julie contributes $12,000 to her 401k, and her employer offers a 50% match on contributions. To find the total balance, first calculate the employer's contribution, which is 50% of Julie's contribution, so $12,000 x 0.5 = $6,000.

Adding the employer's contribution to Julie's contribution gives us the total balance in the 401k account. Therefore, $12,000 (Julie's contribution) + $6,000 (employer's match) = $18,000.

Answer:

False

Step-by-step explanation:

6 + (-7)n = 34

Plug in -7 for n and see if it's true:

6 + (-7)(-7) = 34

6 + 49 = 34

55 = 34

No, it's not true, so the mystery number is not -7.

Answer:

1350 different selections.

Step-by-step explanation:

They have 3 choices for the bands. 15 choices for the stones. and 30 choices for the symbols. Multiply 3 x 15 x 30 for the total number of selections.

Answer: There are 1,350 different ring selections.

Step-by-step explanation:

Given : The number of metals used for rings (gold, silver, or white gold ) =3

The number of stones they have = 15

The number of activity symbols = 30

By using the fundamental principal of counting , we have the total number of different ring selections as :-

[tex]3\times15\times30=1,350[/tex]

Therefore, there are 1,350 different ring selections.

20.00 for each pair of shoes

Cost of one pair of shoes is $4.0625 (Approx.)

Cost of 25 pair gloves and 15 pair shoes = $374.25

Cost of 14 pair gloves and 4 pair shoes = $117.49

Cost of one pair of shoes

Assume;

Cost of one pair of gloves = a

Cost of one pair of shoes = b

So,

25a + 15b = 374.25 ......... eq1

14a + 4b = 117.49 ......... eq2

eq2 × 3.75

52.5b + 15b = 440.5875 ........ eq3

Eq3 - eq1

a = 2.41

So,

14a + 4b = 117.49

b = $4.0625

Cost of one pair of shoes = $4.0625 (Approx.)

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Answer:

The lake's shape is a cylinder. The volume of a cylinder is given as: V=πhr^2 where r equals the radius, and h the depth. Therefre, the volume of the lake is:

V=πhr^2

V=π(20ft)(32,5ft)^2

V=66.364,1875‬ ft^3.

Given that 66.364,1875‬ ft^3 equals 496.44 gallons, we can say that 496.44 gallons of water is required to fill the lake.

Answer:

2 batches

Step-by-step explanation:

8.5×2=17

8.5 cant go into 22.2 anymore or else it'd be over 22.2

so  you can only make 2 batches

Answer:

Cone diameter = 18 m therefore radius = 9 m

Lateral Area = PI * radius * slant height

Lateral Area = 3.14 * 9 * 15 = 423.90 square meters

Step-by-step explanation:

Final answer:

The lateral surface area of a cone with a diameter of 18 meters and a slant height of 15 meters is approximately 423.9 square meters, calculated using the formula LSA = πrl with π approximated as 3.14.

Explanation:

The student is asking about finding the lateral surface area of a cone with a given diameter and slant height, where the diameter is 18 meters and the slant height is 15 meters. To find the lateral surface area (LSA) of a cone, the formula LSA = πrl can be used, where 'r' is the radius of the base and 'l' is the slant height of the cone. Since the diameter is 18 meters, the radius is half of that, which is 9 meters. Using 3.14 as the approximation for π (pi), we can calculate the lateral surface area.

The calculation would be as follows:

Find the radius (r): Diameter / 2 = 18m / 2 = 9m.

Use the formula LSA = πrl: LSA = 3.14 * 9m * 15m.

Calculate the LSA: LSA = 3.14 * 135m².

LSA = 423.9m², which is the lateral surface area of the cone.

Therefore, 423.9 square meters is the closest approximation to the lateral surface area of the given cone.

Answer:

her total grade for class

Hope This Helps!   Have A Nice Day!!