Answer:
Density is defined as mass per unit volume:
density = mass/volume
Density can be calculated using the mathematical formula (expression):
d = m ÷ V
where d = density, m = mass, V = volume
The greater the density, the more mass per unit volume.
The unit of density derived from SI units is kilograms per cubic meter, kg/m3 or kg m-3.
More commonly, densities are given in g/mL (g mL-1) or g/cm3 (g cm-3 or g/cc).
Density is a characteristic property of pure substances so density can help identify a particular pure substance.
Since different substances have different densities, density can also be used to separate one substance from another.
In general, solids are more dense than liquids which are more dense than gases:
density of solid > density of liquid > density of gas
Step-by-step
Answer:
0.338 g/mL
Step-by-step explanation:
Density is the mass per unit volume of any object. It is calculated by dividing the mass of an object by its volume. This is:
ρ = m/V
ρ = 4.05 g / 12 mL
ρ = 0.3375 g/mL
ρ ≅ 0.338 g/mL
this is a khan academy question
Answer:
Its A hope this is correct, please give me brainliest, my dog died today :(
Step-by-step explanation:
What is the benefit of writing expressions to represent real-world situations?
Answer: it help understand life better
Step-by-step explanation:
Can you pls help me with these questions?
I'm giving brainliest ^^
Answer:
A. 15, 9, 3, -3, -9
Step-by-step explanation:
That's all I know, sorry
Answer:
See attached pdf
Step-by-step explanation:
30 POINTS FOR THIS...Bus Stop: A graph has time (minutes) on the x-axis, and distance (miles) on the y-axis. A line goes through points (0, 5), (6, 8), and (12, 11). Friend's house: A 2-column table with 3 rows. Column 1 is labeled Time (minutes) with entries 3, 6, 9. Column 2 is labeled Distance (miles) with entries 4, 6, 8.
Seth is comparing scenarios to determine which starting point he should get dropped off at to get him to school faster. Seth's house is 17 miles from school.
In which scenario does Seth start closer to school?
In which scenario does Seth travel at a greater speed, and what was the rate?
Answer:
In which scenario does Seth start closer to school?
bus stop, 5 miles from home
In which scenario does Seth travel at a greater speed, and what was the rate?
friend’s house, 2 miles every 3 minutes
The speed of Seth when he travels from the Bus stop will be faster. Because the speed is greater.
What is an average speed?The distance covered by the particle or the body in an hour is called the average speed. It is a scalar quantity. It is the ratio of the total distance to the total time.
We know that the average speed formula is given as,
Average speed = Total distance / Total time
The speed of Seth when he travels from the Bus stop will be
Average speed = (8 - 5) / (6 - 0)
Average speed = 3 / 6
Average speed = 0.5 miles per hour
The speed at Seth when he travels from the Friend's house will be
Average speed = (8 - 4) / (9 - 3)
Average speed = 4 / 6
Average speed = 0.33 miles per hour
The speed of Seth when he travels from the Bus stop will be faster. Because the speed is greater.
More about the average speed link is given below.
https://brainly.com/question/12322912
#SPJ2
The Boardman family walked two over five of a mile in two over seven of an hour. What is their unit rate in miles per hour?
two-sevenths over two-fifths equals one and two-fifths miles per hour
two-sevenths over two-fifths equals five over seven miles per hour
two-fifths over two-sevenths equals one and two-fifths miles per hour
two-fifths over two-sevenths equals five over seven miles per hour
Answer:
two-fifths over two-sevenths equals one and two-fifths miles per hour .
The mouse covered 15 I’m sorry haha
Answer:
x=37
Step-by-step explanation:
First you set up the equation, 2x+15+3x-20=180
Then you add like terms, 5x-5=180
Add to both sides, 5x=185
Divide by 5 on both sides, x=37
Which rate has the same unit rate as 8 books in 12 weeks?
F. 2 books in 1 week H. 6 books in 15 weeks
G. 5 books in 7 weeks J. 3 books in 4.5 weeks
Answer: 3 books in 4.5 weeks
Step-by-step explanation:
Answer:
3 books in 4.5 weeks
Step-by-step explanation:
23,461 rounded to the nearest hundred
Answer:
23,500
Step-by-step explanation:
At Supply World, 4 pens cost $10.00. How much do 3 pens cost if the price per pen is the same?
Answer:
$7.50
Step-by-step explanation:
Daniel decides to use the method of proportions and similar
triangles to find the height of a tower. He measures the length of the
tower's shadow and finds it is 72 feet long. Then he holds a 12-inch
ruler perpendicular to the ground and finds that it casts an 24-inch
shadow. How tall is the tower?
a. 3 ft c. 36 ft
b. 4 ft d. 144 ft
Answer:
The answer is B
Step-by-step explanation:
Answer:
It's C.
Step-by-step explanation:
Have a good day.
another brainliest if its right :D
Answer:
C
Step-by-step explanation:
Process of elimination
what is the answer to 2x+3y=-13
Answer:
solve for x
x=(-13/2-3y/2
solve for y
y= -13/2-2x/3
Step-by-step explanation:
hope its the answer you where looking for
help me please thank you!
Answer:
35mins
Step-by-step explanation:
Can you hear me now cost function: y=0.15x+50.75
24 Hour Calls cost function: y=0.9x+24.5
Set two equations equal to each other because we want to find the time (x value) that make the cost (y-value) equal
0.15x+50.75=0.9x+24.5
0.75x=26.25
x=35mins
Sami purchased 5 comic books priced as shown.
$4.50 $3.75 $3.95 $2.19 $3.24
If sales tax is 9%, what is the total price Sami paid? Round to the nearest cent, if necessary.
Answer:
$19.23
Step-by-step explanation:
First, add the prices of all 5 comics together. That should equal $17.63. The tax is 9% so that would be 1.5867 or $1.60. In total, Sami paid $19.23.
please help. I really need it.
pls help me! (question is in the picture)
Answer:
getting the wrong answer or not using the correct symbols
Step-by-step explanation:
Determine how far the vehicle travels in 3 hours. A ferry travels 45 miles every 1 1/2 hours.
Answer:
Um 90 miles lol
Step-by-step explanation:
The ratio of blue marbles to red marbles in a box is 3 to 2. if there are 12 blue marbles in a box then how many red marbles are there?
Answer:
8 red marbles.
Step-by-step explanation:
The ratio is 3:2, blue to red. If there's 12 blue marbles and the first part of the ratio's 3, then:
12/3=4
Then you take the 4 and multiply it by 2, the second half of the ration to get 8.
And so, the answer's 8. If you divide 12:8 by 4 each you get your original ratio of 3:2, so that's your way to check.
Select the three true statements.
1. pi is the area of a circle of radius 1.
2. pi is the area of a circle of diameter 1.
3. pi is the circumference of a circle of radius 1.
4. pi is the circumference of a circle of diameter 1.
5. pi is the constant of proportionality relating the diameter of a circle to its circumference.
6. pi is the constant of proportionality relating the radius of a circle to its area.
Answer:
9/2
Step-by-step explanation:
Need help on
These 2 questions
Answer:
so the answer to the bottom problem is 69
hope this helped i use desmos scientific counculator
- the chair with internet
Which of the following expressions represents the phrase "six added to five times a number"?
O6+5x
O6+5+x
O5+6x
o 11 x
A circular swimming pool measures 79 feet around. What is the diameter?
A. about 200 ft
B. about 25 ft
C. about 50 ft
D. about 100 ft
Answer:
B. about 25 ft
Step-by-step explanation:
you have to add the numbers up a 4 tiems then your awnser comes in and if not multiply 79 2 times your welcome
Step-by-step explanation:
I need help know!!!!!
Answer:Its too small i cant read it
Step-by-step explanation:
Barb needs to run a total of 9 miles each week. So far, she has run 4 miles this week. How much father does she need to run? Write an equation and solve to figure out how many miles she needs to run.
Step by step
Answer: Wouldn't the answer be 5 because 4 plus 5 is 9?
Step-by-step explanation:
Answer:
5 more miles
Step-by-step explanation:
They need to run 9 miles but has already ran 4.
9-4=5
5 miles left to go!
(Hope this helps and I hope I'm not wrong...)
What value of w makes the equation 145 = w + 27 true?
Answer:
118
Step-by-step explanation:
In the equation 145 = w + 27, you can solve for w by subtracting 27 from 145. That would give you 118. You can check this is correct by adding 27 to 118. 118 plus 27 = 145.
Answer:
118
Step-by-step explanation:
145 = w + 27
Switch the + sign before the 27 and switch into a minus and move it to the other side.
145-27=w
145-27=118
w=118
Plsss helppp i rlly need help with this math!!!
Answer:
13.150
14. 11.2
Step-by-step explanation:
Have a good day :)
Help me please.........
What is the slope of the line that passes through the points (-8, -3)(−8,−3) and (-12, -3) ?(−12,−3)? Write your answer in the simplest form.
Answer:
(-3,-5) is the answer
Answer:
-3
Step-by-step explanation:
What is the slope of this line? −3/2 −2/3 2/3 3/2
Answer:
-3/2
Step-by-step explanation:
To find the slope of the line, you need to use the slope formula.
[tex]m=\frac{y_{2} -y_{1} }{x_{2} -x_{1} } \\[/tex]
Plug in the given points into the equation and solve for m.
[tex]m=\frac{-5 -1 }{6 -2 } \\\\m=\frac{-6}{4} \\m=-\frac{3}{2}\\[/tex]
The slope is -3/2.
hey can someone help me with that
Answer:
70
Step-by-step explanation:
because it stand itself
Answer:
The answer is 280
Step-by-step explanation:
400/100=4, so must multiply 70 x 4 = 280