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
Lilit [14]
3 years ago
11

Solve each given equation and show your work. Tell whether each question has one solution, an infinite number of solutions, or n

o solutions. Explain your answers. (A) 2x+4(x-1)=2+4x. (B) 25-x=15-(3x+10) (C) 4x=2x+2x+5(x-x)
Mathematics
1 answer:
laiz [17]3 years ago
3 0
2x + 4(x - 1) = 2 + 4x
2x + 4x - 4 = 2 + 4x
6x - 4 = 2 + 4x
6x - 4x = 2 + 4
2x = 6
x = 3........there is 1 solution

25 - x = 15 - (3x + 10)
25 - x = 15 - 3x - 10
25 - x = -3x + 5
3x - x = 5 - 25
2x = - 20
x = -20/2
x = -10.....there is 1 solution

4x = 2x + 2x + 5(x - x)
4x = 4x + 5x - 5x
4x = 4x......this has infinite solutions

learn this...
if ur equation ends in a variable equaling a number, then there is one solution.
if ur equation ends in something not equal, like 2 = 4, or 4 = 6, then there is 0 solutions.
if ur equation ends in something equal to something,(the same) like 2 = 2, or 4x = 4x, then there is infinite solutions

You might be interested in
A solution contains 5 grams of a pure drug in 100 milliliters of solution. How many grams of pure
Artyom0805 [142]

Answer:

4.25 grams

Step-by-step explanation:

100 / 5 = 20

85 / 20 = 4.25

4.25 grams of pure drug are in 85 milliliters of a solution.

7 0
2 years ago
(6 x 10^2) divide (3 x 10^-5)
Hunter-Best [27]

Answer:

=20000000 (let me know if it's incorrect)

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Write the equation of the line that passes through the points (−7,5) and (-7,-8).
Viefleur [7K]

Answer:

x = -7

Step-by-step explanation:

First we find the slope using

m = ( y2-y1)/(x2-x1)

   = ( -8 - 5)/( -7 - -7)

   = (-8-5)/(-7+7)

   = -13/0

This means the slope is undefined and the line is vertical

Vertical lines are in the form

x= constant and the constant is the x value of the points

x = -7

3 0
3 years ago
What is the opposite of -7
Brums [2.3K]
The opposite of -7 is 7. 
3 0
3 years ago
Read 2 more answers
HI can you help me with this problem?The quantity demanded x for a certain brand of MP3 players is 300 units when the unit price
Vlad [161]

The demand equation is P = -0.05x + 105

STEP - BY - STEP EXPLANATION

What to find?

<em>The demand equation.</em>

The following information is used to solve the problem.

If (x₁ , y₁) and (x₂, y₂) are any dinstinct points on a line a non-vertical line L, then the equation of the line that has a slope(m) and passes through the point (x₁ , y₁) is given by the formula below:

y-y_1=_{}\frac{y_2-y_1}{x_2-x_1}(x-x_1)

Assume p, be the unit price and x be the demand when the price is $p.

From the question given, when the unit price x = 300 units, the demand p = $90 and when the unit price x = 1300 units, the demand p = $40

This means the demand curve passes through the points (300, 90) and (1300, 40).

Assume the demand equation is linear, then the line of the equation passes through the points (300, 90) and (1300, 40).

Now;

y=p x₁ =300 y₁ = 90 x₂ = 1300 y₂=40

Substitute the values into the function and simplify.

p-90=\frac{40-90}{1300-300}(x-300)

Simplify the above.

p-90=\frac{-50}{1000}(x-300)p-90=-0.05(x-300)

Open the parenthesis.

P- 90 = -0.05x + 15

Add 90 to both-side of the equation.

P = -0.05x + 15 + 90

P = -0.05x + 105

Hence, the demand function is P = -0.05x + 105

6 0
1 year ago
Other questions:
  • for the breakfast buffet, mr. walker must cut and equally divide 12 loaves of bread over 7 platters. how many loaves of bread ar
    7·2 answers
  • 5 less than a number is more than 20
    13·1 answer
  • Vector has x and y components of -8.80 cm and 18.0 cm, respectively; vector has x and y components of 12.2 cm and -6.80 cm, resp
    15·1 answer
  • Plz help me with this.
    6·2 answers
  • If I have a 60% in class and I get 100% on 4 test. What letter grade will that put me at?
    7·1 answer
  • −5x−4y=10<br> what is the y and x intercept
    5·2 answers
  • Non proportional or proportional
    9·1 answer
  • How many dessert combinations does Megan have? Just write the number in the space below
    15·1 answer
  • Please help will give brainlyisttt
    10·2 answers
  • Given f of x is equal to 2 divided by the quantity x squared plus 3x minus 10 end quantity, which of the following is true?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!