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attashe74 [19]
3 years ago
14

Can anybody help me im in need of help

Mathematics
2 answers:
soldier1979 [14.2K]3 years ago
8 0
The first question's answer is the second choice. The second question's answer is the first choice. The third question's answer is the second choice.
lilavasa [31]3 years ago
3 0
Part 1: Expand \ 7x(x+4) 

7x*x+7x*4    Distribute 

Use \ Product \ Rule    x^ax^b=x^a^+^b 

7x^2+7x*4
 
 

7x^2+28x

 


Part 2: 4x(2x^3-7x^2+x) 


4x*2x^3+4x*-7x^2+4x*x
 
      Distribute 

4*2xx^3+4x*-7x^2+4x*x 

<span>Use \ Product \ Rule    x^ax^b=x^a^+^b 
</span>
4*2x^1^+^3+4x*-7x^2+4x*x&#10;&#10; &#10; 

&#10;4*2x^4+4x*-7x^2+4x*x&#10; &#10; 

8x^4-4*7xx^2+4x*x   Gather \ like \ terms 

8x^4-4*7x^1^+^2+4x*x 

8x^4-4*7x^3+4x*x 

8x^4-28x^3+4x*x 

8x^4-28x^3+4x^2


Part 3: The \  largest \ number  \ that  \ divides \ evenly  \ into \ 12x \ and  \ 20 \ is  \ 4. 
<span>
</span>GCF = 4<span>


</span><span>Hence Solved 
</span>


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Answer:

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∴ -32x = -128 ⇒ ÷ -32

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- The time for the maximum height = 4 seconds

- Substitute this value of x in the equation of h(x)

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