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juin [17]
3 years ago
9

Find the coordinates of point P that partition AB in the

Mathematics
1 answer:
Ira Lisetskai [31]3 years ago
6 0

Answer:

(1.6, 0)

Step-by-step explanation:

Point P, partitioning AB in the ratio 1:4, implies that it divides AB into, AP and PB, such that AP to PB = 1:4.

Use the formuka below to find the coordinates of point P:

x = \frac{mx_2 + nx_1}{m + n}

y = \frac{my_2 + ny_1}{m + n}

Where,

A(1, -1) = (x_1, y_1)

B(4, 4) = (x_2, y_2)

m = 1, n = 4

Solve by plugging the above values where necessary as follows:

x = \frac{mx_2 + nx_1}{m + n}

x = \frac{1(4) + 4(1)}{1 + 4}

x = \frac{4 + 4}{5}

x = \frac{8}{5}

x = 1.6

y = \frac{my_2 + ny_1}{m + n}

y = \frac{1(4) + 4(-1)}{1 + 4}

y = \frac{4 - 4}{5}

y = \frac{0}{5}

y = 0

The coordinates of P that partitions AB into the ratio 1:4 are (1.6, 0)

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If AC = 14, what is the measure of AD? Round your answer to the nearest hundredth.
nikklg [1K]

Part A

Answer: Choice D) \text{AD} = \sqrt{(2n+5)^2+(4n-3)^2}

-----------------------------------------------

Explanation:

Let E be the intersection point of the diagonals. For any parallelogram, the diagonals bisect each other. This means that AE = EC = 2n+5 and it also means EB = DE = 4n-3

Focus on triangle AED. This triangle is a right triangle with angle AED as a 90 degree angle (any rhombus has its diagonals that are perpendicular to one another). The legs of this triangle are AE = 2n+5 and ED = 4n-3

Apply the pythagorean theorem to find hypotenuse AD

(\text{leg1})^2+(\text{leg2})^2 = (\text{hypotenuse})^2\\\\(\text{AE})^2+(\text{ED})^2 = (\text{AD})^2\\\\(\text{AD})^2 = (\text{AE})^2+(\text{ED})^2\\\\\text{AD} = \sqrt{(\text{AE})^2+(\text{ED})^2}\\\\\text{AD} = \sqrt{(2n+5)^2+(4n-3)^2}\\\\

This points to choice D as the final answer.

===========================================================

Part B

<h3>Answer:   7.07</h3>

-----------------------------------------------

Explanation:

If AC = 14, then half of this is AE = 7. The diagonals bisect each other, so they cut each other in half with E at the midpoint.

Since AE = 2n+5, we can solve for n like so

2n+5 = 7

2n = 7-5

2n = 2

n = 2/2

n = 1

Then we can find the length of AD

\text{AD} = \sqrt{(2n+5)^2+(4n-3)^2}\\\\\text{AD} = \sqrt{(2*1+5)^2+(4*1-3)^2}\\\\\text{AD} = \sqrt{(2+5)^2+(4-3)^2}\\\\\text{AD} = \sqrt{7^2+1^2}\\\\\text{AD} = \sqrt{49+1}\\\\\text{AD} = \sqrt{50}\\\\\text{AD} \approx 7.0710678\\\\\text{AD} \approx 7.07\\\\

Segment AD is roughly 7.07 units long. The other external sides of the rhombus (AB, BC and CD) are also this length because the four sides of any rhombus are the same length.

7 0
3 years ago
F(x) varies inversely with x and f(x) = –10 when x = 5. What is the inverse variation equation?
Andreyy89
<span>f(x) = –10
f(5)=-10
f=</span>-10 divided by 5
f=-2
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3 years ago
The proceeds from a car wash are directly proportional to the number of cars washed. the total after 9 cars was $180.
Tatiana [17]

Answer:

a) 1200

b) 75

Step-by-step explanation:

6 0
3 years ago
1) What would be another way to name plane M?
garri49 [273]

The correct answer is C plane HJG

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Chen is bringing fruit and veggies to serve at an afternoon meeting. He spends a total of $28.70 on 5 pints of cut veggies and 7
deff fn [24]
The answer would be $1.75 (Rounded off to the nearest cent).

Substitute the given cost of each pint of fruit to the equation. Transpose and simplify, to get the price of a pint of veggies.
Given: <span>5v + 7f = 28.70; f = $2.85
Solution: </span><span>5v + 7(2.85) = 28.70
                </span><span>5v + 19.95 = 28.70
                5v = 8.75
                  v = 1.75</span>
6 0
3 years ago
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