You just need to translate the sentences into formulas: let x be the number, we have
- The difference of a number and 7 means
- Twice that difference means
So, the left hand side of our equation is 2x-14. Similarly, we have
- The sum of the number and 9 means
- Three times that sum means
So, the right hand side of our equation is 3x+27. We can set and solve the equation
So, the solution is -41.
-0.9 is the awnser look at my work and check it though (sorry for the bad hand writting
Even though it's 2 <em>cubic</em> feet, it doesn't matter. It still can be transformed into inches.
1 foot = 12 inches
Multiply the 2 feet by 12 which should be:
12×2=24
So 24 cubic inches can be fit into a empty box with a volume of 2 cubic feet.
Hope this helps!
Answer:
(1,0)
I hope this is good enough:
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