jadeossowski3590
06.10.2020 •
Mathematics
Can someone explain how my teacher did this? I don't understand it at all.
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Ответ:
To get the top number in the X you do 7x^2*-20 that’s how the -140x^2 came
Than the bottom is just the middle number which is -31x.
For te side numbers they have to be something when multiplied together you get the top number but also when you add them together you get the bottom. And -35x*4x gives you -140x^2. And -35x+4x gives you -31x.
Then for the box it looks like she put the numbers/letter you multiply to be able to get the answers. 7x*x. Gives you 7x^2. And 7x*-5 gives you -35x. So on...
Ответ:
$660.00
Step-by-step explanation:
(5,500) (0.03) (4)
which means
5,500 times 0.03 times 4
equals: 660