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02.10.2019 •
Mathematics
How many dollars more is the price of a muffin than the price of a brownie at david's store
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Ответ:
How many dollars more is the price of a muffin than the price of a brownie at David's store
Answer is 2$
Ответ:
price per brownie: 18/6 = 3
There are $3 per brownie
price per muffin: 50/10 = $5
So a muffin is $2 more than the price of a brownie
Ответ:
5x²-30x-35=0
x²-6x-7=0 -7=-7*1, -6=-7+1
(x-7)(x+1)=0
x-7=0, x=7 hours.
x+1=0, x=-1 (we cannot take negative for hours)
So, answer is 7
Check
y=25+30*7=235
y=5x²-10= 5*7²-10=245-10 =235