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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 .

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seropon [69]
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Since she makes $56 along with 15% of meals served (which is $65.25), you add those together to get her final income the week she serves $435 worth of meals, so...
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3 0
3 years ago
Pleaseee help help
Eddi Din [679]

The angle the golfer went off line from the tee when they  drove the ball

is \phi=28.2 \textdegree because the cosine rule has been applied to calculate the angle

From the question we are told that:

Distance of hole from tee d_h=340yards

Distance to the right d_r=230yards

Ball distance from hole d_b=175 yard

Given that the three points form a triangle x,y,z respectively

Where

d_h=xz

d_r=xy

d_b=yz

Using Cosine Rule

yz^2=xy^2+xz^2-2(xy)(xz)cos\phi

Therefore

cos\phi=\frac{yz^2}{xy^2+xz^2-2(xy)(xz)}

cos\phi=\frac{(175)^2}{230^2+340^2-2(230)(340)}

cos\phi=0.88

\phi=28.2 \textdegree

In conclusion the angle the golfer went off line from the tee when they

drove the ball is mathematically deducted and give as

\phi=28.2 \textdegree

For more information on this visit

brainly.com/question/21856223

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V125BC [204]

Answer:

<u>Given </u>

  • f(x) = 3 + 6x

A

<u>Find the inverse of f(x):</u>

  • x = 3 + 6f⁻¹(x)
  • 6f⁻¹(x) = x - 3
  • f⁻¹(x) = (x - 3) / 6

B

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C

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  • f((x - 3)/6) =
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