Answer: Choice C and Choice D
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Explanation:
- Choice A doesn't work because it the $1 should be $7 instead.
- Choice B doesn't work because it should be Elena spending $7 total on 3 notebooks and a $1 pen. The x is the amount per notebook.
- Choice C does work. If x is the number of grapes Noah gives each friend, then 3x is the total amount Noah gives over. Then 3x+1 is the number of grapes total. That +1 at the end is the grape Noah eats. We end up with 3x+1 = 7 because Noah starts off with 7 grapes.
- Choice D works also. The x is the number of hours for math, science and history each. So 3x is the combined time of those three classes. Add on 1 to get 3x+1 to represent all 7 hours, ie 3x+1 = 7.
- Choice E does not work. If it was her spending $7 on 3 markers and a $1 pen, then it would work.
152.5 is 250% of the number, 61
-51 and 714
Step-by-step explanation:
-23-38=-51
722-8=714
9514 1404 393
Answer:
16 and 4
Step-by-step explanation:
If x is the smaller one, then the larger is 4x. Their sum is ...
x + 4x = 20
x = 20/5 = 4
The two numbers are 16 and 4.
