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Law Incorporation [45]
3 years ago
15

The length of a rectangular swimming pool is twice as long as its width. If the perimeter of the pool is

Mathematics
1 answer:
Nitella [24]3 years ago
4 0

The perimeter of a rectangle is the sum of its sides, which are two widths and two lengths:

p=w+w+l+l

Since the length is twice the width, we have l=2w, and the formula for the perimeter becomes

p=w+w+2w+2w=6w

So, we have

6w=120 \iff w=\dfrac{120}{6}=20

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Please help me somebody!!! I really struggle with this in math class!
Tresset [83]

Answer:

y - 9 = -\frac{4}{3}(x - 3)  

Step-by-step explanation:

Given the points (3, 9) and (9, 1), we must first solve for the slope of the line before proceeding with writing the point-slope form.

In order to solve for the slope (<em>m </em>), use the following formula:

m = (y₂ - y₁)/(x₂ - x₁)

Let (x₁, y₁) =  (3, 9)

     (x₂, y₂) = (9, 1)

Substitute these values into the given formula:

m = (y₂ - y₁)/(x₂ - x₁)

m = (1 - 9)/(9 - 3)

m = \frac{-8}{6} = \frac{-4}{3}

Therefore, the slope of the line, m = -4/3.

Next, using the slope, m = -4/3, and one of the given points, (x₁, y₁) = (3, 9), substitute these values into the following point-slope form:

y - y₁ = m(x - x₁)

y - 9 = -\frac{4}{3}(x - 3)  ⇒ This is the <u>point-slope form</u>.

4 0
2 years ago
Please help with areas
Softa [21]

Answer:

Step-by-step explanation:

7) The formula for determining the area of a parallelogram is expressed as

Area = base × height.

Length of base = Area/height

Therefore,

Length of base = 7/2 = 3.5 feet

8) The formula for determining the area of a trapezoid is expressed as

Area = 1/2(a + b)h

Where

a and b are the length of the bases

h is the height. Therefore

21 = 1/2(2 + 4)h

21 = 3h

h = 21/3 = 7 inches

9) Area = base × height.

Height = Area/Length of base

Height = 28/14 = 2 inches

10) a and b are 10 inches each.

Area = 1/2(a + b)h

Therefore,

35 = 1/2(10 + 10)h

35 = 10h

h = 35/10

h = 3 inches

7 0
3 years ago
I need help fast thank you
kondor19780726 [428]

Answer:

RO = 39.5

Step-by-step explanation:

RO/9 = 57/13

13RO = 513

RO = 513/13

RO = 39.46

5 0
2 years ago
Read 2 more answers
Juan bought 14 chicken wings for $22.40. If Juan spent 12.80 how many chicken wings did he buy?
aleksklad [387]
14 chicken wings is $22.40
x chicken wings is $12.80

14x12.80 =179,20
179,20/22,40 = 8

he bought 8 chicken wings
8 0
3 years ago
What mathematical relationship do you see between voltage and current
QveST [7]
V that is potential diff is equal to current multiplied by resistance. This snows that v is proportional to current directly
6 0
3 years ago
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