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
Varvara68 [4.7K]
3 years ago
6

From the set {-252, -64, 64}, use substitution to determine which value of x makes the equation true.

Mathematics
1 answer:
Effectus [21]3 years ago
3 0

9514 1404 393

Answer:

  x = 64

Step-by-step explanation:

I find it easier to solve the equation, which requires 1 operation. Substituting 3 numbers requires 3 operations, so is 3 times the work. (I'm basically lazy.)

  4x = 256 . . . . given

  x = 256/4 = 64 . . . . the last of the listed values

__

Alternatively, you can let a graphing calculator or spreadsheet try the list of values for you. That result is attached.

_____

Since you know the rules of signed multiplication, you know that x must be positive. Only one answer choice is positive, so you really only need to try one number.

  4(64) = 256 . . . . true, so x = 64

You might be interested in
Find the equation of the exponential function represented by the table below
Gennadij [26K]

Answer:

y = 3^(1 + x)

Step-by-step explanation:

Notice that each time x increases by 1, y increases by a factor of 3.

Thus, the required equation  has the form y = 3^x.

Check:  If x = 0, do we get 3?  No.  Therefore we must modify the exponent:

y = 3^(1 + x)

Check:  If x = 0, do we get 3?  3^(1 + 0) = 3 (correct)

If x = 2, do we get 27?  3(1 + 2) = 3^3 + 27 (correct)

4 0
3 years ago
4a x 6a⁵ ÷ 8a²<br><br>please answer the question in full steps, thank you ​
german

Answer:

4a×6a^5 ÷8a^2

24a^6÷8a^2

3a^4

6 0
3 years ago
Read 2 more answers
What is the difference of 15 and 23=
Evgesh-ka [11]
Just simply subtract 23 by 15 to get the difference of 8

4 0
3 years ago
Read 2 more answers
A mother explains to her child that the price on the sign is not the total price for an oil painting, because the price does not
dlinn [17]

Answer:

Or u cld simply just say 945 - 875 = 70

3 0
2 years ago
How do you find the x intercepts of 3x^(5/3) - 4x^(7/3)
kaheart [24]
Set the whole expression = to 0 and solve for x.

3x^(5/3) - 4x^(7/3) = 0.  Factor out x^(5/3):     x^(5/3) [3 - 4x^(2/3)] = 0

Then either x^(5/3) = 0, or 3 - 4x^(2/3) = 0.

In the latter case, 4x^(2/3) = 3. 

To solve this:  mult. both sides by x^(-2/3).  Then we have

4x^(2/3)x^(-2/3) = 3x^(-2/3),            or 4 = 3x^(-2/3).  It'd be easier to work with this if we rewrote it as

4           3
---  = --------------------
1            x^(+2/3)

Then 

4
---  = x^(-2/3).  Then, x^(2/3) = (3/4), and x = (3/4)^(3/2).  According to my     3                      calculator, that comes out to x = 0.65 (approx.)

Check this result!  subst. 0.65 for x in the given equation.  Is the equation then true?

My method here was a bit roundabout, and longer than it should have been.  Can you think of a more elegant (and shorter) solution?
7 0
3 years ago
Read 2 more answers
Other questions:
  • The dimensions of a rectangle are 3x - 4 and 5x - 11. Which formula can be used to find the perimeter p of the rectangle?
    9·2 answers
  • Convert 21 99 to a decimal using long division.
    11·2 answers
  • How do I set the proportions up
    12·1 answer
  • Marco's painting has an area of 320 square inches. If the width of the painting is 16 inches, what is the length of the length o
    10·2 answers
  • Choose the equation that best fits the following graph.​
    9·1 answer
  • Can someone please help me!! Ive been asking for help and I not getting any.. please help
    5·2 answers
  • 3x+13 what is x I need help please Need a quick response
    5·1 answer
  • Write the equation of a line that passes through the point (22,6) and is parallel to the line that passes through the points (0,
    13·1 answer
  • In the picture below, how many unit
    11·1 answer
  • Allie identifies the coordinates of point D as (3, 7). Explain her error and explain how to correctly identify the ordered pair.
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!