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
seraphim [82]
3 years ago
14

What is the x-coordinate at the point of intersection for these equations?

Mathematics
2 answers:
DerKrebs [107]3 years ago
7 0
Think of the given

<span>f(x) = 2.8x - 12
g(x) = 5.8x + 9

as 

</span><span>y = 2.8x - 12
y = 5.8x + 9

We want the value of x, not the value of y.  So, subtract the 2nd equation from the first.  Doing so will eliminate the variable y and leave you with one equation in the variable x.  Solve for this x value.
</span><span> 
 y= 2.8x - 12 
 -y =-(5.8x + 9)
--------------------
 0 = -3x - 21     What is the value of x?</span>
DerKrebs [107]3 years ago
4 0

Answer:

A) x = -7 .

Step-by-step explanation:

Given : f(x) = 2.8x - 12

g(x) = 5.8x + 9.

To find : What is the x-coordinate at the point of intersection for these equations.

Solution : We have given that

y = 2.8x - 12  ------- ( equation 1)

y = 5.8x + 9--------( equation 2)

On subtracting equation 2 from equation 1.

y = 2.8x - 12

(-)y = (-)5.8x +(-) 9

______________

0=  - 3x - 21

On adding 21 both sides

21 = -3x

On dividing both sides by -3 and switching sides .

x = -7 .

Therefore, x = -7 .

You might be interested in
How many blocks fill this prism?
zaharov [31]
Answer : 72 blocks

To find the answer, you have to find the volume of the prism. To find the volume you multiply the length, width, and height.

6 x 3 x 4 = 72

This gives you 72 blocks.
3 0
3 years ago
What algebraic expression models the word phrase three fewer than the sum of c and d?
Serjik [45]
" the sum " means add

(c + d) - 3 <== ur expression
4 0
3 years ago
Read 2 more answers
If m DBC = 25x+ 7 and m TBC = 12x+ 5 =, find the degree measures of TBC, DBT, and DBC.
AlladinOne [14]
I honestly don't know any of this so
5 0
3 years ago
Read 2 more answers
Alternate angles explain
Tanzania [10]

Here is the required diagram .

\setlength{\unitlength}{1cm}\begin{picture}(0,0)\thicklines\multiput(0,0)(0,3){2}{\line(1,0){4}}\qbezier(0,0)(0,0)(4,3)\qbezier(1,0)(1.2,0.35)(0.8,0.6)\qbezier(3,3)(2.8,2.65)(3.2,2.4)\put(2.5,0.02){\vector(1,0){0}}\put(1.5,3.02){\vector(-1,0){0}}\end{picture}

Alternate angles are equal .

4 0
3 years ago
The domain of both
Margarita [4]

Answer:

The domain of function h(x) is set of all real numbers.

Domain: (-∞,∞)

Step-by-step explanation:

Given:

f(x)=x-6

g(x)=x+6

the domain of both the above functions is all real number.

To find domain of :

h(x)=f(x)g(x)

Substituting functions f(x) and g(x) to find h(x)

h(x)=(x-6)(x+6)

The product can be written as difference of squares. [a^2-b^2=(a+b)(a-b)]

∴ h(x)=x^2-36

The degree of the function h(x) is 2 as the exponent of leading term x^2 is 2. Thus its a quadratic equation.

For any quadratic equation the domain is set of all real numbers.  

So Domain of h(x) is (-∞,∞)

7 0
3 years ago
Other questions:
  • Which expression gives the volume of a sphere with radius 15?
    12·2 answers
  • Shane returned from Las Vegas with $700, which is 75% more than what he had in the beginning of the trip, how kuch money did Sha
    10·2 answers
  • A map of Scotland is drawn to a scale of 1:325,000. How many centimetres on the map would show 65km?
    9·1 answer
  • Population growth is:<br> A) Logarithmic<br> B) Linear<br> C) Exponential<br> Please help ASAP!!! :(
    7·1 answer
  • What is the volume of this cube? <br> Show your work.<br> no bots
    11·1 answer
  • Please helppppppp. <br> 5<br> 15<br> 32<br> 40
    12·2 answers
  • Solve for X, please give a brief run-over on how you got there.
    7·1 answer
  • GIVING BRAINLIEST, NO LINKS, LOOK AT THE PICTURE
    14·1 answer
  • Please help quickly!!<br> What is the radius, diameter and r2 of a circle with a 3cm area?
    14·1 answer
  • Factor the polynomial below completely
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!