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Tcecarenko [31]
3 years ago
7

M(−6, 7) is the midpoint of DF¯¯¯¯¯ . The coordinates of point D are (−14, 13) .

Mathematics
2 answers:
Helen [10]3 years ago
4 0
(2, 1) is the answer
Sveta_85 [38]3 years ago
3 0

Answer:

F(2,1)

Step-by-step explanation:

Step 1

Find the x-coordinate of point F

we know that

The formula to calculate the x-coordinate midpoint between the point D and the point F is equal to

Mx=\frac{Dx+Fx}{2}

substitute the values

-6=\frac{-14+Fx}{2}

Solve for Fx

-12=-14+Fx

Fx=2

Step 2

Find the y-coordinate of point F

we know that

The formula to calculate the y-coordinate midpoint between the point D and the point F is equal to

My=\frac{Dy+Fy}{2}

substitute the values

7=\frac{13+Fy}{2}

Solve for Fy

14=13+Fy

Fy=1

The coordinates of the point F are (2,1)

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Ali, Carrie and Bryan received a sum of money. Bryan's money was 3/5 as much as Ali's money. The ratio of Ali's money to Carrie'
monitta

Answer:

The sum of money received by Ali, Carrie and Bryan is $ 740.

Step-by-step explanation:

At first we translate mathematically each sentence:

(i) <em>Ali, Carrie and Bryan received a sum of money. </em>

a - Ali's money.

b - Bryan's money.

c - Carrie's money.

(ii) <em>Bryan's money was </em>\frac{3}{5}<em> of  Ali's money</em>.

b = \frac{3}{5}\cdot a (1)

(iii) <em>The ratio of Ali's money to Carrie's money was 4 : 1</em>.

\frac{a}{c} = 4 (2)

(iv) <em>Ali had $ 160 more than Bryan</em>.

a = b + 160 (3)

After some algebraic handling, we have the following system of linear equations:

3\cdot a - 5 \cdot b = 0 (1b)

a - 4\cdot c = 0 (2b)

a - b = 160 (3b)

The solution of the system is: a = 400, b = 240, c = 100

The sum of money is:

s = a + b + c

s = 740

The sum of money received by Ali, Carrie and Bryan is $ 740.

4 0
3 years ago
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I don’t see an attachment
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Afina-wow [57]

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3 years ago
A number is between 50 and 55. It has prime factors of 2, and 9. What is the number?
mihalych1998 [28]

Answer:

The answer is 54.

Step-by-step explanation:

54 divided by 2 will give you 27.

54 divided by 9 will give you 6.

3 0
3 years ago
The total surface area of this cuboid is 112cm^2. Find the value of x.
Oxana [17]

Answer:

The value of x is 3

Step-by-step explanation:

Let us study the face of the cuboind

∵ The cuboid has 6 rectangular faces

∵ Each opposite faces area equal in areas

∴ 2 faces of dimensions 10 cm and 2 cm

∴ 2 faces of dimensions 10 cm and x cm

∴ 2 faces of dimensions 2 cm and x cm

∵ The total surface area of the cuboid is the sum of the areas of the 6 faces

∵ The area of the rectangle = length × width

∴ The total surface area = 2(10 × 2) + 2(10 × x) + 2(2 × x)

∴ The total surface area = 2(20) + 2(10x) + 2(2x)

∴ The total surface area = 40 + 20x + 4x

→ Add the like terms 20x and 4x

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∵ The total surface area of this cuboid is 112 cm²

→ Equate the two sides of the total surface area

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→ Subtract 40 from both sides

∵ 40 - 40 + 24x = 112 - 40

∴ 24x = 72

→ Divide both sides by 24

∴ x = 3

∴ The value of x is 3

7 0
3 years ago
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