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sierranicole114
13.10.2019 •
Mathematics
Ineed with this work sheet in algebra 2 i need some understanding can someone me?
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Ответ:
When it says 39 less than a number is 21. "Less than" means to subtract. The 39 is less than x, so it's x-39=21.
8 times a certain number increased by 1 is 65. Break it down, first 8 times a number, so it's 8*x or 8x. Then we add 1 to that, so it's 8x+1=65.
5 times some number decreased by 2 times the number is 42. Decreased by is subtraction. So it's 5x-2x=42.
When you look for the key words increased by (add), more than (add), multiplied by, times, less than (subtract), decreased by (subtract), is (equal sign), they will help determine what you need to do.
I hope this gives you a little more understanding. Good luck with it! :)
Ответ:
The substance that cools and seals the friction part of the machine. According to the source, there are mineral lubricants (such as machine oil), vegetable lubricants (such as castor oil) and animal lubricants (such as tallow)
Step-by-step explanation: