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Cerrena [4.2K]
4 years ago
5

Can anyone help me with these?

Mathematics
1 answer:
katrin2010 [14]4 years ago
6 0

Answer:

Step-by-step explanation:

Distributive property: a*(b + c)  = ab + ac

16)5x²(7 - x²) = 5x²*7 - 5x²*x²

                   =35x² - 5x⁴

17)

10x(4 - 3x) = 10x*4 - 10x*3x

                  = 40x - 30x²

18) 9( y +4) = 9*y + 9*4

                 = 9y + 36

19) 3(4 - x) - 3(2 - x) = 3*4 - 3*x -3*2 - x*(-3)

                                = 12 - 3x - 6  + 3x  {add/subtract like terms}

                                = 12 - 6 - 3x + 3x

                                = 6

20) 6y + 6(y - 4) = 6y + 6*y - 6*4

                          = 6y + 6y - 24

                          = 12y - 24

                         

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solong [7]

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8 0
3 years ago
Show all work. plz
Verizon [17]
1 - For this one I am not too sure as I generally only work with values that require an unknown. This one is an unknown asking for the values to see the fraction equivalent to 3/4 however if I had to guess here it would probably be 9/12 as it asks what is equal to 3/4. 3 goes into 9 3 times and into 12 4 times so it equals 3/4. Note: 9/12 has a numerator less than the denom but so does 6/8 which is the lesser fraction and still equals 3/4.
2 - Well simply put. \frac{5}{15} =  \frac{1}{3} 
3 - For this one we have to do a bit of work.
Basically just make an equation such as n for numerator and d for denominator.
d = 2n - 4
Now all we have to do is plug in.
2 * 3 - 4 = 2 
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<span>2 * 9 - 4 = 14 </span>
<span>2 * 12 - 4 = 20 
</span>So now we know our numerator or n equals 12.
The denominator or d equals 20 so we would get the fraction of....
\frac{12}{20}
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4 years ago
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