Vertex of graph y+2x+3=-(x+2)^2+1

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Ответ:

travawnward

30.11.2020

Mathematics

1.5D in

Step-by-step explanation:

we know that

A worker uses 450 inches of steel wire to make 300 springs

using proportion

Find out how many inches of steel wire are needed to make D spring

Let

x -----> inches of steel needed

$\frac{450}{300}\frac{in}{springs}=\frac{x}{D}\frac{in}{springs} \\\\x=D\frac{450}{300}\\\\x=1.5D\ in$

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