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3 years ago

Y=x/3 What is the constant of proportionality?

Mathematics

2 answers:

alexandr402 [8]3 years ago

6 0

1/3 is the constant of proportionality?

mariarad [96]3 years ago

3 0

Can I have the brainliest

y = 1/3 x
the constant of proportionality is 1/3 or 0.3333333333

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1. The velocity of a car as it travels over a level crossing is modeled by v = t2 – 4t + 12

ruslelena [56]

Answer:

At t=2s the car reach its minimum speed

Minimum speed=8m/s

Step-by-step explanation:

We are given that velocity of car

$v(t)=t^2-4t+12$

0<t<4

Differentiate w.r.t t

$v'(t)=2t-4$

$v'(t)=0$

$2t-4=0$

$2t=4$

$t=2$

$v''(t)=2>0$

The velocity is minimum at t=2 s

Substitute t=2

$v(2)=2^2-4(2)+12$

$v(2)=8m/s$

Hence, the speed of car is minimum at t=2 se and minimum speed of car=8m/s

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3 years ago

Find the cosine of ∠D.

Zolol [24]

Answer:

5/13

Step-by-step explanation:

Using SOHCAHTOA

Cosine of D = adjacent / hypotenuse

Cosine of D = 5 / 13

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3 years ago

Brenda has $500 in her bank account. Every week she withdraws $40 for miscellaneous expenses. How many weeks can she withdraw th

Blizzard [7]

Answer: 7 and half weeks

Step-by-step explanation:

The solution is in the attachment

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3 years ago

Change -40° to radians. A). 2π/9 B). -2π/9 C). 4π/9 D). -4π/9

Inessa05 [86]

To solve this, we are going to multiply our degrees by a conversion factor. Remember that 1°= $\frac{ \pi }{180}$ , so to convert -40° to radians, we are going to multiply -40° by the conversion factor $\frac{ \pi }{180}$ ; that way we can cancel degrees and express our answer in radians:

(-40°) $(\frac{ \pi }{180} )= -\frac{2 \pi }{9}$

We can conclude that the correct answer is: B). -2π/9

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3 years ago

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yawa3891 [41]

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B) 1.17 dollars per pound

(Everything above is rounded so do the math to find the more accurate numbers)

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3 years ago