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3 years ago

Lea bought g gallons of gasoline for 1.5$ per gallon and c cans of oil for 2.5 per can.

Mathematics

2 answers:

Semenov [28]3 years ago

5 0

Answer:

t = 1.5g + 2.5c

Step-by-step explanation:

g represents how many gallons Lea bought and c is how many cans of oil. You add the cost together to get t, which is the total.

DaniilM [7]3 years ago

4 0

Answer:

hauw

Step-by-step explanation:

uwus

jajaiaiaiusuixhek

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2 years ago

Seven-eighths equals 0.875 and is a(n) ___.

kirza4 [7]

Answer:

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3 years ago

Find a fraction equivalent to 5/7 whose squared terms add up to 1184.

bogdanovich [222]

The system of equations of two unknowns is formulated and solved.

$\large\displaystyle\text{$\begin{gathered}\sf \bf{ \left\{\begin{matrix} \ \ \ \dfrac{x}{y} = \dfrac{5}{7} \\ x^2+y^2 = 1184 \end{matrix}\right. \ \Longrightarrow \ x=\dfrac{5}{7}y } \end{gathered}$}$

$\large\displaystyle\text{$\begin{gathered}\sf \bf{ \left (\dfrac{5}{7}y \right )^2+y^2=1184\ \Longrightarrow\ 25y^2+49y^2=58016 } \end{gathered}$}$

$\large\displaystyle\text{$\begin{gathered}\sf \bf{74y^{2}=58016} \end{gathered}$}\\\large\displaystyle\text{$\begin{gathered}\sf \bf{ \ \ \ \ \ \ y^{2}=784 } \end{gathered}$}\\\large\displaystyle\text{$\begin{gathered}\sf \bf{ \ \ \ \ \ y=\pm\sqrt{784}=\pm28 } \end{gathered}$}$

$\large\displaystyle\text{$\begin{gathered}\sf \bf{ x=\dfrac{5}{7}(\pm 28)=\pm 20 } \end{gathered}$}$

The fraction that satisfies the request is $\bf{\dfrac{20}{28}}$ , since in $\bf{\dfrac{-20}{-28}}$ the negative signs are canceled and the first fraction is obtained.

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1 year ago

the VD warehouse is having a clearance sale. a CD player that originally sell for 60 is now priced tp 36 what is the percent dec

Maksim231197 [3]

Answer:

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3 years ago