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Marina86 [1]
3 years ago
12

SOLVE. 70 = -2.5xneed this asap

Mathematics
1 answer:
nalin [4]3 years ago
4 0

Answer:

-28

Step-by-step explanation:

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the frame of a picture is 28 cm by 32 cm outside and is of uniform width.What is the width of the frame if 192 cm2 of the pictur
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Answer:

The width of the frame is equal to 8\ cm  

Step-by-step explanation:

Let

x-------> the width of the frame picture

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The formula to solve a quadratic equation of the form ax^{2} +bx+c=0 is equal to

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in this problem we have

x^{2}-30x+176=0

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substitute in the formula

x=\frac{30(+/-)\sqrt{(-30)^{2}-4(1)(176)}} {2(1)}

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x=\frac{30(+/-)14} {2}

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x=\frac{30-14} {2}=8\ cm  

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