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jason9394
29.12.2019 •
Mathematics
Suppose that a cows give b gallons of milk in c days. at this rate, how many gallons of milk will dd cows give in e days?
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Ответ:
'A' cows ==> (B)/(C) gallons per day
1 cow ==> (B)/(A·C) gallons per day
1 cow ==> (B·E)/(A·C) gallons in 'E' days
'D' cows ==> (B·D·E)/(A·C) gallons in 'E' days.
Ответ:
total amount spent on toll=$1.75 each(two in number i.e at two tolls)
=1.75×2=$3.50
amount spent on gas station for filling up the gas =$ 28
suppose amount spent on two tolls and amount spent on gas station for filling the gas are two solution of an algebraic expression.
now , writing in terms of algebraic expression
⇒(x-3.50)(x-28)
⇒(x-7/2)(x-28)
⇒x(x-28)-7/2(x-28)
⇒x²-28 x-7/2 x-![+\frac{7}{2}\times28](/tex.php?f=+\frac{7}{2}\times28)
⇒x²-
+98
terms are, x²,-
,98
coefficient of x²=1
coefficient of x=
=-1/2×7×3×3×x
constant term=98=7×7×2
coefficients of the algebraic expression that represents the total cost of gas and tolls=-[coefficient of x]=63/2=28 [amount spent on gas] +3.50 [amount spent on toll]=$31.50