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natka813 [3]
3 years ago
10

A rectangular living room has a perimeter of 38 meters and an area of 90 square meters.

Mathematics
1 answer:
ruslelena [56]3 years ago
3 0

Answer:

10 meters by 9 meters

Step-by-step explanation:

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Whats the length in meters of CD?​
Gnesinka [82]

Answer:

The length of DC in meters is  \frac{60}{13} ⇒ A

Step-by-step explanation:

In the circle O

∵ AB passing through O

∴ AB is a diameter

∵ D is on the circle

∴ ∠ADB is an inscribed angle subtended by arc AB

∵ Arc AB is half the circle

→ That means its measure is 180°

∴ m∠ADB = \frac{1}{2} × 180° = 90°

In ΔADB

∵ m∠ADB = 90°

∵ AD = 5 m

∵ BD = 12 m

→ By using Pythagorase Theorem

∵ (AB)² = (AD)² + (DB)²

∴ (AB)² = (5)² + (12)²

∴ (AB)² = 25 + 144 = 169

→ Take square root for both sides

∴ AB = 13 m

∵ ∠ADB is a right angle

∵ DC ⊥ AB

∴ DC × AB = AD × DB

→ Substitute the lengths of AB, AD, and DB

∵ DC × 13 = 5 × 12

∴ 13 DC = 60

→ Divide both sides by 13

∴ DC = \frac{60}{13} m

∴ The length of DC in meters is  \frac{60}{13}

6 0
2 years ago
Helpppppppppppppppppppp pleaseeeeeeeeeee
Umnica [9.8K]

Answer:

FG = 16

Step-by-step explanation:

if df bisects <edg then  triangles DFE and DFG are similar AAA

since DF is the same in both triangles triangles DFE and DFG are congruent

therefore FE = FG

n+5 = 2n-6

subtract n from each side

n-n+5 = 2n-6-n

5 = n-6

add 6 to each side

5+6 = n

n=11

FG  = 2n-6

      =2*11 -6

    = 22-6

   = 16


6 0
3 years ago
Need help asap.pls and thanks
love history [14]

Answer:

your speed is 135 mph

Step-by-step explanation:

                                   

6 0
3 years ago
What are the possible dimensions of trapezoid with an area of 100 cm^2?! Need help ASAP
Digiron [165]

Answer:

First, Second and Last Options are correct choices.

Step-by-step explanation:

Regards: Umer

8 0
3 years ago
What is the solution to the equation? 12 = |X| - 3 X= -36 or 36 X= -9 or 9 X = -4 or 4 X = -15 or 15​
quester [9]

Answer:

x = -15 or 15

Step-by-step explanation:

We can simplify |x| - 3 = 15 to |x| = 15 because we can add 3 on both sides due to -3 being outside of the absolute value bars. Next, we can say that x is either 15 or -15 because of the absolute value (|15| is equal to 15 and |-15| is also equal to 15).

7 0
3 years ago
Read 2 more answers
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