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mina [271]
2 years ago
9

What are two of the great feats of civil engineering accomplished by the engineers of Ancient China? A. The Pyramids and the Sph

inx B. Aqueducts and the Colosseum C. The Great Wall and the Grand Canal D. The Taj Mahal and the Panama Canal
Mathematics
1 answer:
Paraphin [41]2 years ago
4 0

Answer:

C

Step-by-step explanation:

Pyramids and Sphinx are Egypt

Aqueducts and Colosseim and Rome

Taj Mahal and Panama Canal aren't even in the same location

China is well known for its Great Wall so its C

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(x+12) (3x+2)<br> Find the value of X
KatRina [158]

Step-by-step explanation:

Equation at the end of step 1

(3x2 - 38x) + 24 = 0

STEP2:Trying to factor by splitting the middle term

 2.1     Factoring  3x2-38x+24 

The first term is,  3x2  its coefficient is  3 .

The middle term is,  -38x  its coefficient is  -38 .

The last term, "the constant", is  +24 

Step-1 : Multiply the coefficient of the first term by the constant   3 • 24 = 72 

Step-2 : Find two factors of  72  whose sum equals the coefficient of the middle term, which is   -38 .

     -72   +   -1   =   -73     -36   +   -2   =   -38   That's it

Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above,  -36  and  -2 

                     3x2 - 36x - 2x - 24

Step-4 : Add up the first 2 terms, pulling out like factors :

                    3x • (x-12)

              Add up the last 2 terms, pulling out common factors :

                    2 • (x-12)

Step-5 : Add up the four terms of step 4 :

                    (3x-2)  •  (x-12)

             Which is the desired factorization

Equation at the end of step2:

(x - 12) • (3x - 2) = 0

STEP3:Theory - Roots of a product

 3.1    A product of several terms equals zero. 

 When a product of two or more terms equals zero, then at least one of the terms must be zero. 

 We shall now solve each term = 0 separately 

 In other words, we are going to solve as many equations as there are terms in the product 

 Any solution of term = 0 solves product = 0 as well.

Solving a Single Variable Equation:

 3.2      Solve  :    x-12 = 0 

 Add  12  to both sides of the equation : 

                      x = 12

Solving a Single Variable Equation:

3 0
3 years ago
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Subtract:<br> 7n - (2n-8)<br> Your answer should be in simplest terms.<br> Enter the correct answer
rewona [7]

Answer:

5n+8

Step-by-step explanation:

We are swamped with questions today so i will not be able to provide you with work. But I'm a college professor. Trust my answer.

Glad I was able to help!!

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3 years ago
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OLEGan [10]
15x4y2 letter B is your answer
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2 years ago
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ivann1987 [24]
We know that
length of a sector=[∅]*r--------> when ∅ is in radians
so
∅=length of a sector/r
for r=7 ft
length of a sector=4 ft
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the answer part 1) is 0.57 radians

part 2) 
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the answer Part 2) is 14 ft²
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3 years ago
 Which two transformations preserve their orientation?
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Answer:

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