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3 years ago

I’m having trouble expressing my answer in algebraic notation

Mathematics

1 answer:

andre [41]3 years ago

8 0

$\bf -2x-4\le -4x+4\implies -2x\underline{+4x}-4 \le -4x\underline{+4x}+4
\\\\\\
2x-4\le 4\implies 2x-4\underline{+4}\le 4\underline{+4}\implies 2x\le 8
\\\\\\
x\le \cfrac{8}{2}\implies x\le 4$

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Answer:

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Step-by-step explanation:

Part a) Write a quadratic function to find the distance from the edge of the photo to the edge of the frame

Let

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The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

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in this problem

we have

$4x^{2} +20x-39=0$

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substitute in the formula

$x=\frac{-20(+/-)\sqrt{20^{2}-4(4)(-39)}} {2(4)}$

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$x=\frac{-20(+/-)32} {8}$

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$(4+2x)=4+2(1.5)=7\ in$

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