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2 years ago

The length of a rectangle is 4 feet more than three times the width. What is the length of the

Mathematics

1 answer:

Hitman42 [59]2 years ago

6 0

Answer:

22 feet

Step-by-step explanation:

width = x

length = 4 + 3x

Perimeter = 2(4+3x) + 2x

8+6x+2x =56

8x =48

x=6

4+3x=4+3times6=22 --> lenght

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Answer:

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2 years ago

A survey was done to determine the effect of students changing answers while taking a multiple-choice test on which there is on

Umnica [9.8K]

Answer:

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Step-by-step explanation:

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2 years ago

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Step-by-step explanation:

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2 years ago

Pleasr help me ASAP! Thank you^-^ If w = 10 units, x = 5 units, and y = 6 units, what is the surface area of the figure? Round y

Sladkaya [172]

Answer:

D:456.2 units²

Step-by-step explanation:

Step 1: Area of all 4 sides of cuboid

Area of rectangle = 4 x length x breadth

Area of rectangle = 4 x 10 x 5

Area of rectangle = 200

Step 2: Calculate bottom of cuboid

Area = length x breadth

Area = 10 x 10

Area = 100

Step 3: Calculate slant height of pyramid

c² = a² + b²

c² is hypotenuse

a² is the base which is half of w (10/2 = 5)

b² is y which is 6

c² = a² + b²

c² = 5² + 6²

c = √61

Step 4: Calculate area of one face of the pyramid

Area of triangle = 1/2 x base x height

Area of triangle = 1/2 x 10 x √61

Area of triangle = 5√61

Step 5: Calculate areas of all 4 faces of the pyramid

4 x 5√61 = 20√61

Step 6: Calculate the total surface area

Total surface area = 200 + 100 + 20√61

Total surface area = 456.2

The surface area of the figure is 456.2 units²

Option D is correct.

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2 years ago