compounds are pure substances. What other substances are considered pure substances? A: chemical reactions B: elements C: mixtures D: solutions

Answers

Answer 1

Answer:

Step-by-step explanation:

B


Related Questions

Can u guys help me with #5 and 6 please?

Answers

Hope this works!
Jjgvxdhgkhxsggvxsouyvuvy

The speed (v) of a gear varies inversely as the number of teeth (t). If a gear that has 48 teeth makes 20 revolutions per minute, how many revolutions per minute will a gear that has 30 teeth make?

I give Brainliest! Please show work too.

Answers

Answer:

80

Step-by-step explanation:

8x + y = 20
x - 2y = -6

Answers

Answer: the answer is

Step-by-step explanation:

Which expression best describes the array modeled below?

Answers

Answer:

Where is it??

Step-by-step explanation:

Using Substitution solve: y=x+5
4x+y=20

Answers

Answer:

3

Step-by-step explanation:

So first, plugin y to your equation, it should look like this: 4x+x+5+20. Now, we can solve this. Next, we have two x's so we can combine them. The equation will now look like this: 5x+5=20. Now, we have an extra 5 laying around that we need to get rid of, so we can subtract that 5 to both sides of the equation and we get this: 5x-5=20-5 which ends up being 5x=15. Now, we just divide both ides by 5 and since 15 divided by 5 is 3, we get: x=3

Point L is on line segment

K

M

‾

KM

. Given

L

M

=

2

LM=2 and

K

M

=

19

,

KM=19, determine the length

K

L

‾

.

KL

.

Answers

Answer:

k is the option that makes sense

An arts academy requires there to be 5 teachers for every 115 students and 3 tutors for every . How many students does the academy have per​ teacher? Per​ tutor? How many tutors does the academy need if it has 77 students ​?

Answers

Answer:

1.23

2. Question incomplete

3. Needs Question 2 to Answer

Step-by-step explanation:

1. 115÷5=23

Tam giác ABCD có góc B = 65 Độ góc C = 115 Độ hỏi góc A bằng bao nhiêu độ

Answers

Answer:

a

Step-by-step explanation:

kasi yun ang tama at

nain tindi han ko

A





pls give me brainliest!! <3 have a good day

Simplify 3c-9d+7c+5d

Answers

Answer:

10c - 4d

Step-by-step explanation:

Hey there,

Combine like terms

3c - 9d + 7c + 5d

3c + 7c - 9d + 5d

= 10c - 4d

Hope this helps you.

Let me know if you have any other questions :-)

Which number equals 3/4 to the power of negative 2

Answers

Answer:

16/9

Step-by-step explanation:

16/9=1.77777777778

(3/4)^-2=1.77777777778

what is the graph of the function rule?
y= 4x - 1

Answers

Answer:

join the two points

Step-by-step explanation:

(x,y) = (1,3)

(just by substituting the number into the equation to make it fit)

then, also draw a point at (0.-1)

Answer:

I hope this helps, and is what you are looking for.

good luck!

put these fractions in order from least to greatest

4/10 4/11 4/7​

Answers

Answer:Putting these fractions from least to greatest would be (4/11, 4/10, and 4/7).

Step-by-step explanation:

Hope this helps! ^_^ Please give brainleist and leave a rating if you like this answer!

what can 34 be divided by

Answers

Answer:

1, 2, 17, 34

Step-by-step explanation:

1 x 34 = 34

2 x 17 = 34

Answer:

Well 34 can be divided by anything...

Step-by-step explanation:

34/1 = 34

34/2 = 17

34/3 = 11.3333

34/4 = 8.5

34/5 = 6.8

34/6 = 5.6666

34/7 = 4.857...

34/8 = 4.25

34/9 = 3.7777

34/10 = 3.4

Hope this help!

Hugh drove on the highway at a constant rate. He traveled 204 miles in 3 hours. How far did hugh travel in 1 hour? At what rate was he traveling?

Answers

68. Divide 204 by 3. I hope this helps :)

HELP ASAP. A cargo plane and a private jet leave at the same time from the same airport traveling in opposite directions. The jet travels at twice the speed of the cargo plane. They are 2,400 miles apart in 4 hours. Find the speed of the cargo plane and the jet plane.
////////////////Rate Time Distance
Cargo

___________________________

Jet

Answers

600 miles in a hour then just look up how fast that is cause 2,400 divided in 4 hours is 600

3x = 4у + 12 .
What is the y intercept

Answers

Answer:

I think it is y=-3

Step-by-step explanation:

Answer:

y=-3

Step-by-step explanation:

Mr. Webster is buying carpet for an exercise room in his basement. The room will have an area of 230 square feet. The width of the room with have 12&1/2 feet. What is the length?

PLEASE DO NOT JUST GIVE THE ANSWER, (I could have done that myself) PLEASE SHOW WORK ON HOW YOU GOT THE ANSWER.

Thanks!

Answers

Answer: 18.4 ft

Step-by-step explanation:

Area= L x W

230= 12.5 x L (Divide both sides by 12.5 to get L)

L= 18.4 ft

Answer:

The length of the room is 18 2/5 feet.

Step-by-step explanation:

The formula for finding the area of rectangles is A = l · w

Since the area and width is given to you, we can substitute that in the formula:

230 = l · 12 1/2

Now we convert the 12 1/2 to an improper fraction so it is easier to solve.

Here's how you convert a mixed number to an improper fraction:

12 · 2 = 24

24 + 1 = 25

and put 25 over the original denominator

     = 25/2

Now you can add that to the equation...

l · 25/2 = 230 (I put 230 on the right side because that is how I am used to solving equations, but you can leave it on the right side as well. It is up to you)

To get rid of fractions, multiply by the reciprocal (Basically you flip the fraction so that the numerator becomes the denominator and the denominator becomes the numerator) on both sides

25/2 · 2/25 cancels itself out

   and

230/1 · 2/25...

   230 · 2 = 460

   1  · 25 = 25

So you would get 460/25

Thus, we end up with:

l = 460/25

Divide 460 by 25 and you get 18.4...

Technically 18.4 is the answer but in decimal form.

If you want it in fraction form, just take 0.4 and put it over 10 because 0.4 is in the tenths place. 4/10 simplifies down to 2/5...

Therefore, the answer is 18 2/5 feet.

I hope this is helpful! Let me know if you have any further questions :D

[tex]200+300+1000[/tex]

Answers

Answer:

200 + 300 + 1000 = 1,500

Step-by-step explanation:

pls brainliest plss :<

Evaluate the expression when m= -3. m²+8m-7​

Answers

Answer:

-22

Step-by-step explanation:

Hope this helps! Pls give brainliest!

geometric proofs- how can i prove that angle DAE=DBE?

Answers

1. AC ~= BC, angle(ACD) ~= angle(BCD)
Given

2. CD ~= CD
Reflexive property

3. triangle(ACD) ~= traingle(BCD)
SAS

4. AD ~= BD
CPCFC (congruent parts of congruent figures are congruent)

5. angle(DAE) ~= angle(DBE)
Properties of isosceles triangle

30% of the swimming team are girls. If there are 18 girls. How many are in the team
altogether?

Answers

Answer:

60 people are in the team altogether

Answer:

60

Step-by-step explanation:

to find the percentage of girls on the swim team, you would multiply a number by 30 percent. to find the number in all, you would divide 18 by 30 percent

18/0.3 = 60

there are sixty people on the swimming team

Find the solution of sqrt(x+3) + 4 = 6 , and determine if it is an extraneous solution. (1 point)

answers

x = 1; not extraneous

x = 1; extraneous

x = 29; extraneous

x = 29; not extraneous

Answers

Answer:

x = 1; not extraneous

Step-by-step explanation:

How to solve -10=║j-7║

Answers

Answer:

-10=||-3-7||

The answer is -3.

-7x+3y=2 (find the ordered pair)

A. (1,3)
B: (-2,-4)
C. Both
D. Neither

Answers

Answer:

C. Both

Step-by-step explanation:

-7(-2) + 3(-4) = 2

14 + (-12) = 2

14 - 12 = 2

2 = 2

-7(1) + 3(3) = 2

-7 + 9 = 2

2 = 2

Both
B
Evidence:
If you plug in the order pair values they equal 2
Step 1:-7(-2)+3(-4)=2
Step 2:14-12=2
Step 3: 2=2

The time it takes for an object dropped from a height to reach the ground is given by the function time (in seconds) =(1/4)√h where h is the initial height in feet. If an object dropped from a building takes 4 seconds to reach the ground what is height of the object was dropped from, to the nearest foot?

Answers

Answer:

256 ft

Step-by-step explanation:

Assuming f(t)=(1/4)√h, we can solve for h by setting 4=(1/4)√h.

4=(1/4)√h

16=√h

h= 16^2 =256 ft

Step-by-step explanation:

h = (4 ÷ ¼)²

h = (4 × 4)²

h = 16² = 256ft

Larry's age if he is 5 years younger than twice his brother's age. Use b for his brothers age.

Answers

Answer:

(b2)-5

Step-by-step explanation:

is it
A) X || Z
B) A T Z
C) A || B
D) X T A

Answers

Answer:

Well I would say the answer is A

Step-by-step explanation:

Because there is no metion of line A

Hope this helps have an awsome day!

6 square root x 6 square root x 6 square root

Answers

Answer:216

Step-by-step explanation:

PLZ HELP, a) twenty two and nine hundred eight thousandths in decimal form. b) three and seven tenths.l in decimal form c) sixty nine and fifty three thousandths in decimal form

Answers

Answer:

Twenty two and nine hundred eight thousandths= 22.908

three and seven tenths = 3.7

sixty nine and fifty three thousandths= 69.053

Write an equation of the form y=kx for the relationship shown in the graph.

Answers

Answer:

28 = 8k

Step-by-step explanation:

(x,y)

so (8,28)

y = kx is a direct proportional formula.

28 = 8k

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