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aleksley [76]
3 years ago
5

Which expression is equivalent to 12 × 3 × 5?

Mathematics
2 answers:
Nikolay [14]3 years ago
5 0
What are the other expressions then I can help
IRINA_888 [86]3 years ago
4 0

The correct answer is 5 × 3 × 12 The commutative property of multiplication states that when 2 numbers are multiplied, their product is the same no matter what order the numbers are placed in

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The following octagon is formed by removing four congruent right triangles from a rectangle. What is the total area of the octag
rewona [7]
To find the total area of the octagon you can find the area of the rectangle that is created by the entire figure and subtract the areas of the four congruent right triangles.

(10 cm x 6 cm) - [4(1/2 x 2 x 2)]
60 cm² -8 cm² = 52 cm²

The total area of the octagon is 52 cm².
7 0
3 years ago
Read 2 more answers
Please write a reason for each step in solving the equation.
trapecia [35]
2. Associative property
3. is distributive property
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8 0
3 years ago
Angles C and E are supplementary. The M&gt;C = 112 and M&gt;E = (3x + 50) Solve for X.
maxonik [38]

Answer:

The value of x is 6

Step-by-step explanation:

we know that

If two angles are supplementary, then their sum is equal to 180 degrees

so

In this problem

m∠C+m∠E=180°

we have

m∠C=112°

m∠E=(3x+50)°

substitute and solve for x

112°+(3x+50)°=180°

3x+162=180

3x=180-162

3x=18

x=6

7 0
3 years ago
Val needs to find the area enclosed by the figure. The figure is made by attaching semicircles to each side of a 42-m-42-m squar
oee [108]

The area enclosed by the figure is 4533.48 square meters.

<u>Step-by-step explanation:</u>

Side length of the square = 42m

The semicircle is attached to each side of the square. So the diameter of the semicircle is the length of the square.

Radius of the semicircle = 21m

Area of the square = 42 x 42 = 1764 square meters

Area of 1 semicircle = π(21 x 21) /2

= (3.14) (441) /2

= 1384.74/2

= 692.37 square meters

Area of 4 semicircle = 4 x 692.37

= 2769.48 square meters

Total area = 1764 + 2769.48

= 4533.48 square meters

The area enclosed by the figure is 4533.48 square meters.

7 0
3 years ago
Question: is 1 &gt; 0.99999999...?<br>Prove algebraically.
Crazy boy [7]
No.  We claim that 1=0.\overline{9} and use algebra to prove the statement.

Let x=0.\overline{9}.  Multiply this by ten to get 10x=9.\overline{9}.  Subtract the initial equation to give 9x=9 and divide by 9 to see that x=1.  Substituting into the original equation gives 1=0.\overline{9}, proving the desired statement.
6 0
3 years ago
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