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3 years ago

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Which of the following functions describes a graph that will intersect the x-axis in exactly one point? o A. y = x2 + 5x o B. y=

22 — 4x o c. y = x2 – 2 – 6 od.y= x2 - 6x + 9?

1 answer:

kifflom [539]3 years ago

4 0

Answer:

N

Step-by-step explanation:

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Solve the system of linear equations by substitution

Elodia [21]

X= 5y + 1

-2x + 9y = -1

-2(5y + 1) + 9y = -1

-10y - 2 + 9y = -1

-y - 2 = -1

-y = 1

y = -1

x + 5 = 1

x = -4

(-4, -1)

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Please Help Me!!!!! The displacement of a particle d (in km) as a function of time t (in hours) is given by: d(t) = 2t^3 + 5t^2

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Answer:

Step-by-step explanation:

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for t = 4 hours

$d(4)=24^3+54^2-3=2*64+5*80-3=128+80-3=205$

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and

$d'(4)=6*4^2+10*4=6*16+40=96+40=136$

this is 136 km/h

d' is differentiable and

$d''(t)=12t+10$

and

$d''(4)=12*4+10=48+10=58$

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3 years ago

Read 2 more answers

A ceiling fan with 16-in. blades rotates at 45 rpm.

Kobotan [32]

A. We're told the fan completes 45 full revolutions every minute. One full revolution is $2\pi\,\mathrm{rad}$ , so the fan has an angular speed of

$\dfrac{2\pi\,\mathrm{rad}}{1\,\mathrm{rev}}\cdot\dfrac{45\,\mathrm{rev}}{\mathrm{min}}=90\pi\dfrac{\rm{rad}}{\rm{min}}$

B. Throughout one full revolution of the fan, a point at the tip of one of the fan's blades travels the circumference of a circle with radius 16 in. The circumference is then $2\pi(16\,\mathrm{in})=32\pi\,\mathrm{in}$ . This means the linear speed is

$\dfrac{32\pi\,\mathrm{in}}{1\,\mathrm{rev}}\cdot\dfrac{45\,\mathrm{rev}}{\mathrm{min}}=1440\pi\,\dfrac{\rm{in}}{\rm{min}}$

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STatiana [176]

Answer:

one qt is 2 pints

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3 years ago

Help I'll make you a Brainlest

melomori [17]

Answer:

x = 13

Step-by-step explanation:

m∠ABC + m∠CBD = 180° {linear pair}

3x + 43 + 6x + 20 = 180

3x + 6x + 43 + 20 = 180

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9x = 180 - 63

9x = 117

x = 117/9

x = 13

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3 years ago