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jok3333 [9.3K]
2 years ago
11

A rectangle has a length of x+ 4 centimeters and a width of x centamentere the perimeter of the rectangle is 28cm what is the va

lue of x
Mathematics
2 answers:
Mashutka [201]2 years ago
6 0

Answer: The perimeter of the rectangle is 28 centimeters.

Step-by-step explanation: I hope this helps-

FinnZ [79.3K]2 years ago
3 0

Answer:

x=10

Step-by-step explanation:

x+4+x=24

2x=20

x=10

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I still dont understand slope can someone help?
katen-ka-za [31]

m = slope\\(x1, y1) = coordinates of first point in the line\\(x2, y2) = coordinates of second point in the line

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2 years ago
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Arrange the parabolas with respect tonthe postion of their vertices from left to right
agasfer [191]

Answer:

The correct answer for this question is this one:


If the x position of the vertex for f(x) is k then : 


1. f(k) => 4x+3=k, x = (k-3)/4 = (k/4)-(3/4) 

2. x = k+3 

3. x = (k+1)/2 = (k/2)-(1/2) 

4. x = 2(k+2) = 2k+4 

5. x = k+7 

6. x = k-3 

7. x = k-2 


So the order depends on the original position of the vertex k, e.g for k=0 the positions would be: 


1. -3/4 

2. 3 

3. -1/2 

4. 4 

5. 7 

6. -3 

7. -2 


So, therefore, the order would be 6 7 1 3 2 4 5



6 0
3 years ago
Find f(-3) if f(x) = x2<br> Help me please!!
tatuchka [14]

Answer:

-3x^2

Step-by-step explanation:

negative three x squared

4 0
3 years ago
the credit remaining on a phone card in dollars is a linear function of the total calling time made with the card in minutes. Th
Advocard [28]

Answer:

he credit remaining on a phone card (in dollars) is a linear function of the

total calling time made with the card (in minutes), as shown in the figure below.

The remaining credit after 45 minutes of calls is $22.80 , and the remaining

credit after 64 minutes of calls is $19.76.

What is the remaining credit after 73 minutes of calls?

;

Not sure what figure you are referring to, write an equation from the given values:

Assign the values as follows

x1 = 45; y1 = 22.80

x2 = 64; y2 = 19.76

:

Find the slope (m) using the formula: m = %28y2-y1%29%2F%28x2-x1%29

m = %2819.76-22.80%29%2F%2864-45%29 = %28-3.04%29%2F%2819%29

m = -.16

:

Write the equation using the point/slope formula: y - y1 = m(x - x1)

y - 22.80 = -.16(x - 45)

y - 22.80 = -.16x + 7.2

y = -.16x + 7.2 + 22.80

y = -.16x + 30

;

Use this equation to find the credit (y) when minutes (x) = 73

y = -.16(73) + 30

y = -11.68 + 30

y = $18.32; credit after 73 minute of calls

:

:

That you can also see the original value of the phone card: x=0, y = $30

;

:

Did this help you understand what's going on here? Any questions

Step-by-step explanation:

8 0
2 years ago
In AKLM, m = 1.2 cm, k = 5.1 cm and
Elodia [21]

Answer:

  4.2 cm

Step-by-step explanation:

The law of cosines is applicable.

  l² = k² +m² -2km·cos(L)

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  l ≈ √17.4236

  l ≈ 4.2 . . . cm

4 0
3 years ago
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