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Vadim26 [7]
2 years ago
11

Calculate the surface area of the rectangle prism in the picture​

Mathematics
2 answers:
kolbaska11 [484]2 years ago
7 0

Answer:

252

Step-by-step explanation:

Formula

2wl + 2lh + 2hw=

2( 12 x 6) + 2( 12x3) + 2 ( 3x 6)

2(72) + 2(36) + 2(18)=

144 + 72 + 36= 216 + 36

252

sergeinik [125]2 years ago
7 0

Step-by-step explanation:

l = 12 in

w = 6 in

h = 3 in

<h3>S. Area = 2 (lw + lh + wh)</h3>

= 2 (12 × 6 + 12 × 3 + 6 × 3)

= 2 (72 + 36 + 18)

= 2 × 126

= 252 in^2

<h3>#CMIIW</h3>

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How do you solve this? r^2+32=12r
Andre45 [30]

Answer:

r = {-8, -4}

Step-by-step explanation:

Simplifying

r2 = -32 + -12r

Solving

r2 = -32 + -12r

Solving for variable 'r'.

Reorder the terms:

32 + 12r + r2 = -32 + -12r + 32 + 12r

Reorder the terms:

32 + 12r + r2 = -32 + 32 + -12r + 12r

Combine like terms: -32 + 32 = 0

32 + 12r + r2 = 0 + -12r + 12r

32 + 12r + r2 = -12r + 12r

Combine like terms: -12r + 12r = 0

32 + 12r + r2 = 0

Factor a trinomial.

(8 + r)(4 + r) = 0

Subproblem 1

Set the factor '(8 + r)' equal to zero and attempt to solve:

Simplifying

8 + r = 0

Solving

8 + r = 0

Move all terms containing r to the left, all other terms to the right.

Add '-8' to each side of the equation.

8 + -8 + r = 0 + -8

Combine like terms: 8 + -8 = 0

0 + r = 0 + -8

r = 0 + -8

Combine like terms: 0 + -8 = -8

r = -8

Simplifying

r = -8

Subproblem 2

Set the factor '(4 + r)' equal to zero and attempt to solve:

Simplifying

4 + r = 0

Solving

4 + r = 0

Move all terms containing r to the left, all other terms to the right.

Add '-4' to each side of the equation.

4 + -4 + r = 0 + -4

Combine like terms: 4 + -4 = 0

0 + r = 0 + -4

r = 0 + -4

Combine like terms: 0 + -4 = -4

r = -4

Simplifying

r = -4

Solution

r = {-8, -4}

3 0
2 years ago
I’m totally confused
elena55 [62]

the first one is a.

the second one is d.

the third one is b.

and the fourth one is c.

6 0
3 years ago
The sum of 2 consecutive integers is –33. If n is the 1st integer, which equation best models the situation?
Masja [62]

Answer:

hard

Step-by-step explanation:

I have never seen this before

8 0
3 years ago
Read 2 more answers
HELP PRECALC DO NOT UNDERSTAND WILL GIVE BRAINLIEST
Olegator [25]

Answer:

  the lower right matrix is the third correct choice

Step-by-step explanation:

Your problem statement shows that you have correctly selected the matrices representing the initial problem setup (middle left) and the problem solution (middle right).

Of the remaining matrices, the upper left is an incorrect setup, and the lower left is an incorrect solution matrix.

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We notice that in the remaining matrices on the right that the (2,3) term is 0, and the (3,2) and (3,3) terms are both 1.

The easiest way to get a 0 in the 3rd column of row 2 is to add the first row to the second. When you do that, you get ...

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Already, we see that the second row matches that in the lower right matrix.

The easiest way to get 1's in the last row is to divide that row by 0.15. When we do that, the (3,4) entry becomes 2100/0.15 = 14000, matching exactly the lower right matrix.

The correct choices here are the two you have selected, and <em>the lower right matrix</em>.

3 0
3 years ago
Find the measure of this angle m 1 = 123 m 8
Anit [1.1K]
If it is parallel lines cut by a transversal then they are probably equal. Alternate exterior.
6 0
2 years ago
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