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3 years ago

What is the surface area for the figure? PLEASE HELP

Mathematics

1 answer:

olga_2 [115]3 years ago

6 0

Answer:

516 cm squared

Step-by-step explanation:

To find the surface area of a rectangular prism such as this, is basically just like finding the OUTSIDE surfaces. We are looking for the "perimeter" of a 3D shape.

How do we do it?

Calculate each face of the prism by multiplying Length x Width.
Make a shortcut by combining like-figures (front of the cube and back of the cube are the same surface areas, etc.)
Make your formula

2(4 · 15) + 2(10 · 15) + 2(12 · 4)

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Write 4 over 6 in simplest form.

aalyn [17]

Answer:

2/3

Step-by-step explanation:

Cancel the common factor 2 = 2/3

6 0

3 years ago

If x+y = z and y−z=x which of the following must be equal to z?

umka21 [38]

ANSWER

EXPLANATION

We have two equations:

The first one is

$x + y = z...(1)$

The second equation is

$y - z = x...(2)$

Let us make z the subject of this second equation:

$\implies \: -x +y = z...(3)$

We now add equation (1) and (3) to get:

$(-x + x) + (y + y) = z + z$

We simplify to get:

$0+2y= 2z$

$2y= 2z$

Divide throu by 2.

$\frac{2y}{2} = \frac{2z}{2}$

$y= z$

$\therefore \: z = y$

The correct answer is C

8 0

4 years ago

Find the total surface area of a cone whose radius is r/2 and slant height is 2l

Hunter-Best [27]

Total surface area of cone: πrl + πr²

Assuming the bottom of the cone is closed.

r = r/2, l = 2l

Total surface Area = π*(r/2)*2l + π(r/2)² = πrl + πr²/4

Total Surface Area = πrl + πr²/4

3 0

4 years ago

To snails are 189 cm apart. They crawl towards each other at rates that differ by 1 cm a minute. After 27 minutes they meet. How

Stella [2.4K]

Speed of snail 1 = 3.795 cm/minute

Speed of snail 2 = 4.795 cm/minute

Solution:

Given that,

Total distance = 189 cm

They crawl towards each other at rates that differ by 1 cm a minute

Let the speed of snail 1 be "x"

Let the speed of snail 2 be "x + 1"

Total time = 22 minutes

Since the snails are moving towards each other,

Speed = x + x + 1 = 2x + 1

How fast is each snail crawling?

$Distance = speed \times time\\\\189 = 2x + 1 \times 22\\\\189 = 44x + 22\\\\44x = 189 - 22\\\\44x = 167\\\\x = 3.795$

Thus,

Speed of snail 1 = 3.795 cm/minute

Speed of snail 2 = 3.795 + 1 = 4.795 cm/minute

7 0

3 years ago

What is the best estimate for 59.87 - 42.1? A. 18 B. 22 C. 25 D. 30

daser333 [38]

Answer:

18 ???

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers