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
IrinaK [193]
3 years ago
7

(Multiple Choice, 20 pts)

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

Answer:

x = -3, x = 0 is a extraneous solution

Step-by-step explanation:

Step 1: Cross-multiply

3x² = 4x² + 3x

Step 2: Isolate <em>x</em>'s

0 = x² + 3x

Step 3: Factor

0 = x(x + 3)

Step 4: Find roots

x = 0, -3

Step 5: Double check work

Plug in both to see if they both work. Only x = 0 should be extraneous. We now have our answer!

You might be interested in
A movie ticket in 2008 cost $10. this year it cost $18
marta [7]

Answer:

inflation is cause of change of price

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
Haos dog ate 40 cns of dog food in 31 day. how many cans should hao buy to feed his dog in 6 days
Crank
The answer is 8. 40 / 31 = 1.29032258. Multiply that by 6 and you have 7.74193548. Round up because you can't buy 7.7 cans of dog food.
7 0
3 years ago
What is an equation of the line that passes through the point (-4,3) and has a slope of -1?
vlabodo [156]
Y=mx+b
plug in the point
3=-1*-4+b
3=4+b
b=-1
y=-1x-1
8 0
2 years ago
Lexi2984 can u help me with this question
arsen [322]

9514 1404 393

Answer:

  see the attachment

Step-by-step explanation:

The x- and y-intercepts are easily found:

<u><em>X-intercept</em></u>

Set y = 0 and divide by the coefficient of x.

  -x +0 = 8

  x = -8

__

<u><em>Y-intercept</em></u>

Set x = 0 and divide by the coefficient of y.

  0 -2y = 8

  y = -4

__

Now, we have two points on the graph: (-8, 0) and (0, -4). A third point can be one that is halfway between these: (-4, -2). The graph is attached.

7 0
2 years ago
Identify the factors of x2 − 4x − 21. (x − 7)(x 3) (x 7)(x − 3) (x 21)(x − 1) (x − 21)(x 1)
Tanzania [10]

The factors of the quadratic expression x² - 4x - 21 is <u>(x - 7)(x + 3)</u>, making the <u>first option</u> the right choice.

A quadratic expression is of the form ax² + bx + c, which can be factorized using the mid-term factorization method, where b is shown as the sum or difference of two such numbers, whose product is equal to the product of a and c.

In the question, we are asked to factorize the quadratic expression, x² - 4x - 21.

In the given expression, a = 1, b = -4, and c = -21.

Thus, ac = -21.

The numbers having a product 21 are:

1*21 = 21,

3*7 = 21.

Since, 3 - 7 = -4 (That is b), we break b into 3 and -7.

Thus, the expression can now be shown as:

x² - 4x - 21

= x² + (3 - 7)x - 21

= x² + 3x - 7x - 21

= x(x + 3) - 7(x + 3) {By taking common}

= (x - 7)(x + 3) {By taking common}.

Thus, the factors of the quadratic expression x² - 4x - 21 is <u>(x - 7)(x + 3)</u>, making the <u>first option</u> the right choice.

Learn more about factorizing a quadratic expression at

brainly.com/question/52959

#SPJ1

5 0
1 year ago
Other questions:
  • Suppose you want to solve the equation 2a+b=2a, where a and b are nonzero real numbers. describe the solution.
    8·1 answer
  • The Elliot’s have budgeted $2000 to install new wood floors in their home. The materials cost them $1055. If the installer charg
    6·2 answers
  • What is 1.1 repeating, 1-1/10, 1.101 from least to greatest?
    10·1 answer
  • How would you find all the possible number of rows without having to check if 8 is a factor of every number between 70 and 150
    12·2 answers
  • Factor completely.<br><br> 3x^2 −147=
    7·1 answer
  • How do you figure out the square root of a number like 76​
    13·1 answer
  • In the following table of values, the first differences are
    12·1 answer
  • Of 10
    13·1 answer
  • Can anyone help? I’m stuck and I’ll give Brainly + 55 pts
    13·1 answer
  • 3 less than the product of 7 and a number?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!