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2 years ago

PLEASE HELP!! Click through and select the graph of y = 2 x - 3. Each represents 1 unit.

Mathematics

2 answers:

Rudik [331]2 years ago

6 0

Step-by-step explanation:

start with this formula

y=mx+b

m is slope

and b is the y intercept so on the y axis place point on -3

the slope m is 2 so, go up 2 points in the y axis then right 1 point(since slope is (2/1)) and place 2nd point there

connect dots and place arrow heads

it is the 2nd graph

elena-s [515]2 years ago

4 0

Answer:

The Answers Slope Is 5/7

Step-by-step explanation:

It is the last image you uploaded to select.

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Thus,
8/10=4/5

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Hope this helps!

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3 years ago

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An arch is in the shape of a parabola. It has a span of 100 feet and a maximum height of 25 ft.

faltersainse [42]

Answer:

$y=-\frac{1}{100}(x-50)^2+25$

the height of the arch 10 feet from the center is 24 feet

Step-by-step explanation:

An arch is in the shape of a parabola. It has a span of 100 feet, the vertex lies at the center 50 and the maximum height of 25 ft.

Vertex at (50,25)

vertex form of the equation is

$y=a(x-h)^2+k$ , (h,k) is the center

$y=a(x-50)^2+25$

the parabola starts at (0,0) that is (x,y)

$0=a(0-50)^2+25$

subtract 25 from both sides

$-25=a(-50)^2$

$-25=a(2500)$

divide both sides by 2500

$a=-\frac{1}{100}$

$y=-\frac{1}{100}(x-50)^2+25$

the height of the arch 10 feet from the center.

center is at 50, 10 feet from the center so x=40 and x=60

$y=-\frac{1}{100}(40-50)^2+25$

y=24

the height of the arch 10 feet from the center is 24 feet

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3 years ago