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NISA [10]
3 years ago
6

A string of decorative lights is 25 feet long. The first light on the string is 16 inches from the plug. The lights on the strin

g are spaced 4 inches apart. How many lights are there on the string?
Mathematics
1 answer:
joja [24]3 years ago
8 0
25 feet = 25 x 12 = 300 inches

First light is at 16 inches.
300 - 16 = 284 inches

Find the rest of the bulbs:
284 ÷ 4 = 71

Total number of lights = 71 + 1 = 72

Answer  72 lights
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Melanie is 5 years older than 3 times the age of Tonya. Melanie is 39 years old is Tonya?
romanna [79]

Answer:

107

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
The length of a rectangle is twice its width<br> The perimeter of the rectangle is 43cm
boyakko [2]

Answer:

7.17 cm

Step-by-step explanation:

If the width is x, the length is twice this  = 2x

And

Perimeter = 2 (W + L)

so

Perimeter =  2 ( x + 2x)

Perimeter  = 2 (3x)

Perimeter  = 6x

43  =  2 ( x + 2x )

43= 2 ( 3x)  

43  =  6x

= 7.17 cm

Hope this helps i'm pretty sure this is how you do it :-)

6 0
3 years ago
What is the slope of a line that is parallel to the line y = 4x - 5
ValentinkaMS [17]
The slope of a line parallel is 4 because a parallel line must have the same slope as the original
6 0
3 years ago
How do i do this I NEED HELP!!!
Shalnov [3]

Answer:

  • penny object: 5
  • quarter object: 10
  • circle object: 20

Step-by-step explanation:

The first thing to realize is that the penny object is <em>not</em> worth 1, and the quarter object is <em>not</em> worth 25. Once you realize <em>the values are not what they seem</em>, but are consistent throughout, it becomes a different problem than it first appears to be.

___

Let p, q, c represent the values of the penny object, the quarter object, and the circle object, respectively. The trick is to find 3 independent equations describing their values.

The middle two rows of the matrix shown give rise to the equations ...

  2p +c +q = 40

  p +2c +q = 55

The leftmost column adds a third independent equation ...

  p + c + 2q = 45

We can subtract the last equation from the middle one.

  (p +2c +q) -(p +c +2q) = 55 -45

  c - q = 10 . . . . . simplify . . . [eq4]

And we can subtract the first equation from twice the last one.

  2(p +c +2q) -(2p +c +q) = 2(45) -40

  c +3q = 50 . . . . simplify . . . [eq5]

Subtracting eq4 from eq5 gives ...

  (c +3q) -(c -q) = (50) -(10)

  4q = 40 . . . . simplify

  q = 10 . . . . . .divide by 4

The eq4 tells us

  c = 10 + q = 10 + 10 = 20

and the third equation tells us

  p = 45 - 2q - c = 45 -2·10 -20 = 5

The object values are: penny, 5; quarter, 10; circle, 20.

5 0
3 years ago
It’s number 6. I’ll give brainliest
rewona [7]
Answer: $12

explanation:

we know that 2 CDs and 6 DVDs cost $156 and 1 CD and 9 DVDs cost $210.
this gives us the equations:

2x + 6y = 156
and
1x + 9y = 210
where x is CDs and y is DVDs

multiply the top equation by 9 and the bottom by -6 to solve for x:

18x + 54y = 1404
-6x - 54y = -1260

add from top to bottom:

12x = 144

divide both sides by 12 to get:

x= $12
6 0
3 years ago
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