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riadik2000 [5.3K]
3 years ago
10

HELP, 30 POINTS !!

Mathematics
2 answers:
sasho [114]3 years ago
8 0
The first one is S(s-4)=7 , and the Second one is 7
vampirchik [111]3 years ago
6 0

Answer: s(s+4)=7, 7 shelves

Step-by-step explanation:

I think it's easiest to find these type of answers by finding the common factors of a number. First 77, they are 1×77 & 7×11.so you can have 11 rocks on 7 shelves or 7 rocks on 11 shelves. The question states the number or rocks on the shelf is more than the number of shelves, so you must have 11 rocks on 7 shelves. You know you have 77 rocks, so the equation must equal 77. I plugged 7 in for s in the equations to determine the correct answer. 7(7+4)=77.

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