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Irina-Kira [14]

3 years ago

9

Jonathan runs 4 days a week. Each day, he runs 4 laps that are each 2 miles long. He spends 208 minutes running each week. He ru

ns each mile in the same amount of time.

1 answer:

fredd [130]3 years ago

4 0

4 laps x 2 miles = 8 miles total

8 miles x 4 days = 32 total miles per week

208 / 32 = 6.5 minutes per mile

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In this situation, x=2.

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A parabola has a focus of F(8.5,−4) and a directrix of x=9.5.

HACTEHA [7]

Answer:

$-\frac{1}{2}y^2-4y+1=x$

Step-by-step explanation:

A parabola has a focus of F(8.5,−4) and a directrix of x=9.5.

General form of horizontal parabola is

$(y-k)^2=4p(x-h)$

the distance between directrix and focus is the value of p

so p = 8.5 - 9.5 = -0.5

Focus is (h+p , k), given focus is (8.5, -4)

So k = -4 and h+p = 8.5

we know p = -0.5

h +p = 8.5

h - 0.5 = 8.5

so h= 9 and k = -4

vertex is (h,k) that is (9, -4)

Now plug in the value in the general equation

$(y-k)^2=4p(x-h)$ , k= -4, h= 9 , p = -0.5

$(y+4)^2=4(-0.5)(x-9)$

$(y+4)^2=-2(x-9)$

$y^2+8y+16=-2x+18$

subtract 18 on both sides

$y^2+8y-2=-2x$

Divide whole equation by -2

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3 years ago

Philip tiene 8 bolas rojas, 3 bolas verdes, 6 bolas amarillas, 13 bolas negras y 15 bolas azules en su bolsa. ¿cuál es la media,

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Media: 9
Mediana: 8
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Step-by-step explanation:
Ojala que te ayude ^^

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The answer is B estimated number is 20

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1. d
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2. d
x-intercept (y=0) is 16
y-intercept (x=0) is 20

3. b
y=1/6x+4
multiplied by 6
6y=x+24
-x+6y=24

4. a 4.75k+2.25p=22

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3 years ago

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