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
Llana [10]
3 years ago
7

If f(x) = x2 - 2x and g(x) = 6x + 4, for which value of x does (f+g)(x) = 0?

Mathematics
2 answers:
madreJ [45]3 years ago
8 0

Answer:

x=-2

Step-by-step explanation:

f(x) = x^2 - 2x

g(x) = 6x + 4

Add them together

f(x) = x^2 - 2x

g(x) =       6x + 4

-----------------------

f(x) + g(x) =x^2 +4x+4

We want to find when this equals 0

0 =x^2 +4x+4

Factor

What two numbers multiply together to give us 4 and add together to give us 4

2*2 =4

2+2=4

0=(x+2) (x+2)

Using the zero product property

x+2 =0    x+2=0

x+2-2=0-2

x=-2

Law Incorporation [45]3 years ago
7 0

Answer:

-2

Step-by-step explanation:

Let's plug your functions f(x)=x^2-2x and g(x)=6x+4 into (f+g)(x)=0 and then solve your equation for x.

So (f+g)(x) means f(x)+g(x).

So (f+g)(x)=x^2+4x+4

Now we are solving (f+g)(x)=0 which means we are solve x^2+4x+4=0.

x^2+4x+4 is actually a perfect square and is equal to (x+2)^2.

So our equation is equivalent to solving (x+2)^2=0.

(x+2)^2=0 when x+2=0.

Subtracting 2 on both sides gives us x=-2.

You might be interested in
Computer Action Company sells computers and computer parts by mail. The company assures its customers that products are mailed a
Scorpion4ik [409]

Answer:

The t distribution is used, because we have the standard deviation for the sample.

Step-by-step explanation:

When to use the z or the t distribution?

When we have the standard deviation for the population, we use the z distribution.

When we have the standard deviation for the sample, we use the t distribution.

In this question:

We have the standard deviation for the sample, which means that the t distribution is used.

8 0
2 years ago
Find the area a and b circumference of the circle with radius 10 m and use 3.14 for pi
zhenek [66]

Answer:

\rule6cm99999cm

6 0
2 years ago
Read 2 more answers
$29,000;$4 decrease find the new amount given the original amount and the percent of change.
stellarik [79]
$1 - (28,996/29,000) = 0.000138
0.0138%
7 0
3 years ago
PLEASE CAN SOMEBODY HELP PLEASE I AM BEGGING YOU PLEASE
rusak2 [61]
(3,-1)? i believe that's what it would be
5 0
3 years ago
Read 2 more answers
The store brought a pair of shoes for 40$ and sold it for 50$. What percentage was the markup?
PSYCHO15rus [73]

Answer:

20%

Step-by-step explanation:

You would do 40/50 and then 40/50 is also 80/100. Then you'd take the remainder and that'd be the mark up price.

8 0
2 years ago
Read 2 more answers
Other questions:
  • ???? HELPPPPPPPPPPPPPPPPPP
    5·1 answer
  • The graph below represents which system of inequalities? graph of two infinite lines that intersect at a point. One line is soli
    11·1 answer
  • Question below. I need answer asap plsss
    13·2 answers
  • In a year, a study found that of the 6 billion people in the world, 5 billion have cell phones. How many people lived without ac
    8·2 answers
  • What is the length of leg s of the triangle below?
    7·1 answer
  • 1/3 woodwind,1/6 percussion,1/2 brass. The Reagan School Marching Band has three percussion musicians.How many musicians altoget
    10·2 answers
  • Help help me please asap
    5·2 answers
  • This one is pretty easy, i just forgot how to do it.
    6·1 answer
  • Which is the graph of the equation y+2=−12(x−4)?
    7·1 answer
  • Idenify the numbers that are located below -3.5 on a vertical number line
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!