3 years ago

What are the x-intercepts of the quadratic function?

Mathematics

1 answer:

goblinko [34]3 years ago

7 0

X intercepts are 3 and 9z

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2 years ago

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3 years ago

Determine the slope of each line.

faust18 [17]

(2,-2)(5,7)

7-(-2)= 9
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slope = 3

(you could also calculate the slope by just counting up how many units it goes up/down when you pick a point from the x-axis and move left/right. basically counting the rise over run)

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2 years ago

A rectangle has a perimeter of 14 inches. A similar rectangle has a perimeter of 10 inches. If the length of the larger rectangl

Jet001 [13]

Answer:

2.9 in.

Step-by-step explanation:

Let x in be the width of the larger rectangle. If the length of the larger rectangle is 4 inches and the perimeter of the larger rectangle is 14 in, then

$x+4+x+4=14,\\ \\2x=14-8,\\ \\2x=6,\\ \\x=3\ in.$

If two rectangles are similar, then their lengths and widths are proportional with the scale factor k. Thus, the length of the smaller rectangle is $4k$ in and the width of the smaller rectangle is $3k$ in. If the perimeter of the smaller rectangle is 10 in, then

$4k+3k+4k+3k=10,\\ \\14k=10,\\ \\k=\dfrac{10}{14}=\dfrac{5}{7},\\ \\4k=\dfrac{20}{7}\approx 2.9\ in,\\ \\3k=\dfrac{15}{7}\approx 2.1\ in.$

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3 years ago