1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
DiKsa [7]
3 years ago
6

Please help, this is from ANNOYING Khan Academy.

Mathematics
2 answers:
Tcecarenko [31]3 years ago
7 0
The answer to this problem is -20
GalinKa [24]3 years ago
5 0

Answer:

-20

Step-by-step explanation:

You might be interested in
Is 2493 closer to 2400 rounded or 2,353
DiKsa [7]
2400 because it is only 93 away from 2493 and 2353 is more than 93 away
8 0
3 years ago
Read 2 more answers
A bike wheel is 26 inches in diameter. What is the bike wheel's diameter in millimeters (1 inch = 25.4 millimeters)? Determine t
Greeley [361]

Answer:

The answer is 660.4 millimeters in diameter.

Step-by-step explanation:

The wheel is 26 inches in diameter. An inch is 25.4 millimeters. 26 * 25.4 = 660.4

3 1
3 years ago
A water tank is being filled by pumps at a constant rate. The volume of water in the tank V, in gallons, is given by the equatio
mamaluj [8]

Answer:

65 gallons per minute

Step-by-step explanation:

The total volume of the tank at any given time is given by the equation:

V(t) = 65t + 280

In order to find the rate of change of volume, we can simply differentiate this equation with respect to time. This will give us the rate of change of the volume or the rate at which water is being pumped into the tank.

Differentiating the above equation we get:

V'(t) = 65

So we can see that the rate at which water is being pumped into the tank is 65 gallons per minute

7 0
3 years ago
Which equation has the solution x = 3?
arsen [322]
Well, let's first solve each equation:

1.) -4x + 6 - 3x = 12 - 2x - 3x

To start, combine each like-term on each side of the equal sign (The numbers with variables in-common // the numbers alike on the same side of the equal sign):

-7x + 6 = 12 - 5x

Now, we get the two terms with variables attached to them, on the same side, so, we do the opposite of subtraction, which is, addition:

-7x + 6 = 12 - 5x
+5x +5x
_____________
-2x + 6 = 12

Next, you do the opposite of addition, which is, subtraction, and, subtract 6 from both sides:

-2x + 6 = 12
-6 -6
____________
-2x = 6

Finally, divide by -2 on each side, to find out what the value of 'x' is:

-2x = 6
÷-2 ÷-2
________
x = -3

So, the answer is not 'A.'
_________________________________________

Now, we test out the rest of the equations, the exact same way:

2.) 4x + 6 + 3x = 12 + 2x + 3x

Combine your like-terms, on each side of the equal sign:

7x + 6 = 12 + 5x

Now, get both terms, with the variable, 'x,' to the same side, and, to do that, do the opposite of addition, which is, subtraction:

7x + 6 = 12 + 5x
-5x -5x
______________
2x + 6 = 12

Next, subtract 6 from both sides:

2x + 6 = 12
-6 -6
__________
2x = 6

Finally, divide by 2, on both sides:

2x = 6
÷2 ÷2
__________
x = 3

So, the answer is 'B.'
_________________________________________

3.) 4x + 6 - 3x = 12 - 2x - 3x

Again, we combine the like-terms, on both sides of the equal sign:

x + 6 = 12 - 5x

Now, we get both terms with the variable 'x,' to the same side, and, the opposite of subtraction, is addition, so, we're going to add 5x to both sides:

x + 6 = 12 - 5x
+ 5x + 5x
______________
6x + 6 = 12

Now, we subtract 6 from each side, because, the opposite of addition, is subtraction:

6x + 6 = 12
- 6 - 6
_____________
6x = 6

Now, divide by 6, on both sides:

6x = 6
÷ 6 ÷ 6
_____________
x = 1

So, the answer is not 'C.'
_________________________________________

4.) 4x + 6 - 3x = 12x + 2x + 3x

First, we combine the like-terms:

x + 6 = 17x

Next, we get both terms, with the variable, 'x,' to the same side:

x + 6 = 17x
-x -x
_____________
6 = 16x

Now, divide by 16, on both sides:

X = 3/8

So, 'D,' is not the answer.
_______________________

The answer is, 'B.'

I hope this helps!
8 0
3 years ago
How many cubes unit fit the container​
Marina86 [1]

Answer:

it depends on the size of the cubes

Step-by-step explanation:

and the volume of the containers

3 0
3 years ago
Other questions:
  • How do you solve 6 x + 5 x − 25 = − 5 x − 28
    9·1 answer
  • An experiment consists of flipping a fair coin 4 times. What is the probability of obtaining at least one head?
    7·1 answer
  • Traveling at 65 miles per hour, approximately how long will it take for Marcus to drive 310 miles
    6·2 answers
  • Which pair shows equivalent expression
    10·1 answer
  • What are the zeros of f(x) = (x − 5)(x − 4)(x − 2)?
    13·2 answers
  • One of those fraction type questions, that I don’t know
    12·1 answer
  • Ryan completed 1/8 of his test in 2/5 hour. If Ryan’s rate stayed the same, how much of his test was finished in one hour
    10·1 answer
  • Convert rectangular equation to polar equation
    7·1 answer
  • 4(4t=(4x4) blank/ answer blank t answer
    13·2 answers
  • 5, 3.1.24<br><br> f(x) = 3x² + 5; find f(x + 3) - [f(x) + 3]
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!