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vlada-n [284]
2 years ago
12

Find out if the lengths form a right triangle ​

Mathematics
1 answer:
Mila [183]2 years ago
3 0

Answer:

The triangle is a right triangle.

Step-by-step explanation:

Since The Pythagorean Theorem only works on right triangles, we can use this knowledge to prove whether this triangle is right:

a^2 + b^2 = c^2\\10^2 + (2\sqrt{39})^2 = 16^2\\100 + (4 \times 39) = 256\\100 + 156 = 256\\256 = 256

Therefore, the triangle is right.

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6. A rectangle has a perimeter of 62 feet. If its length is 9 feet longer than its width, find
Anastaziya [24]

Answer:

length = 20 ft, width = 11 ft

Step-by-step explanation:

let w be width, then length = w + 9

The opposite sides of a rectangle are equal , then

2w + 2(w + 9) = 62

2w + 2w + 18 = 62

4w + 18 = 62 ( subtract 18 from both sides )

4w = 44 ( divide both sides by 4 )

w = 11

and w + 9 = 11 + 9 = 20

then width = 11 ft and length = 20 ft

8 0
3 years ago
How do i do this and tell me how u got the answer
EastWind [94]
Substitute.
2x+(2x -15) = -3

4x -15 = -3
Add 15 to both sides

4x = 12

Divide by 4

X=3

2(3) + y = -3

6+y=-3
-6 from both sides
Y=-9

(3,-9)
3 0
3 years ago
How do I complete this formal check?
postnew [5]
IDK sorry I need points
8 0
3 years ago
Mitchell is measured in February for the customs of a school play he’s 47 feet fabric he has 12 1/3 yards of fabric how many mor
Step2247 [10]
47- 12 1/3 = 34 2/3
He needs 34 and 2/3 feet more of fabric
8 0
3 years ago
-2=k. 2 = k·1=k<br> Solve the equation.<br> Enter your answer in the box.<br> k=
Gekata [30.6K]

Answer:

k=-1

Step-by-step explanation:

-2=k. 2

Diving whole equation by 2

-2/2=k

k=-1

5 0
3 years ago
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