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4 years ago

Which statement descibes the speed of the remote control car over time

2 answers:

6 0

the speed of the car decreases from 4 mi/h to 2 mi/h in the first 3 second increases to 5 mi/h in the next 5 5 seconds,and then remains 5 mi/h for the last 10 seconds

arlik [135]4 years ago

3 0

Answer:D

Step-by-step explanation:

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These questions both go together if you answer it I'll give you brainliest !! :)

Anna71 [15]

Where are the questions..

3 0

3 years ago

Given f(y) will mark brainly

Paraphin [41]

Answer:

y = -0.904, 19.904

Step-by-step explanation:

f(y) = 9

f(y) = sqrt(y + 99)

-------------------------------------------

9 = sqrt(y +99) - y

81 - 18y + y^2= y + 99

-19y + y^2 = 18

y(y - 19) = 18

y = -0.904, 19.904

(I used a calculator to solve those values)

5 0

3 years ago

Find a particular solution to y" - y' + 9y = 3 sin 3x

Dima020 [189]

Answer:

cos3x

Step-by-step explanation:

y" - y' + 9y = 3 sin 3x

$D^{2}y-Dy+9y=3 sin3x$

$y=\frac{3 sin 3x}{(D^{2} -D+9}=3 sin 3x$

here $D^2$ will be replaced by $\alpha^2$ where $\alpha$ is coefficient of x

$y=\frac{3 sin 3x}{-3^{2} -D+9}$

$y=-3\frac{sin 3x}{D}$

$y=-3\int\ {sin 3x} \, dx$

$y=-3\frac{cos3x}{-3}$

y=cos3x

hence Particular solution is cos3x

6 0

4 years ago

A random sample of vacationers were asked whether they were traveling to another country for their upcoming trip. The resulting

weeeeeb [17]

Answer:

The Margin of error = 0.01

Step-by-step explanation:

Explanation:-

step(i):-

Given confidence interval for the proportion of vacationers traveling abroad

(0.14,0.16)

The 95% of confidence interval for Population proportion with margin of error is determined by

( p⁻ - M.E , p⁻ + M.E)

step(ii):-

The margin of error is determined by

$M.E = Z_{\alpha } \sqrt{\frac{p(1-p)}{n} }$

Given Confidence interval is ( 0.14 , 0.16 )

Now

(( p⁻ - M.E , p⁻ + M.E) = (0.14,0.16)

Equating

p⁻ - M.E = 0.14 ...(i)

p⁻ + M.E = 0.16 ...(ii)

Solving (i) and (ii) equations , we get

p⁻ - M.E = 0.14

p⁻ + M.E = 0.16

- - -

- 2 M.E = -0.02

M.E = 0.01

The margin of error = 0.01

Conclusion:-

The margin of error = 0.01

8 0

3 years ago

Which of the following ordered pairs is a solution to y = 2X?

Schach [20]

Answer:3,9

Step-by-step explanation:

3 0

3 years ago