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miss Akunina [59]
3 years ago
12

Can someone help me solve this ?! Will mark brainliest

Mathematics
2 answers:
Elenna [48]3 years ago
7 0
Roberto has twice the mass his sister Mary has but runs at the same velocity as Mary. Will his kinetic energy be twice as much?

(Mary has a mass of 40 kg and sprints at 1 m/s)


Can someone help me with this (sorry I don’t have enough point for a question and no one has answered this and I’m confused)
Natalija [7]3 years ago
5 0

Answer:

The second, the third, and the last one

Step-by-step explanation:

The second is correct because we just multiply by 6 on both sides, thus not changing the value of the x

The third is correct because we just distribute the 6 into the parenthesis, and multiply the equal side by 6, thus just simplifying the expression, not changing it.

The last is correct because you just subtract 4 from both sides, and since done to both sides, doesn't change the equation.

Hope i helped you :)

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Y=arccos(1/x)<br><br> Please help me do them all! I don’t know derivatives :(
Stells [14]

Answer:

f(x) =  {sec}^{ - 1} x \\ let \: y = {sec}^{ - 1} x  \rightarrow \: x = sec \: y\\  \frac{dx}{dx}  =  \frac{d(sec \: y)}{dx}  \\ 1 = \frac{d(sec \: y)}{dx} \times  \frac{dy}{dy}  \\ 1 = \frac{d(sec \: y)}{dy} \times  \frac{dy}{dx}  \\1 = tan \: y.sec \: y. \frac{dy}{dx}  \\ \frac{dy}{dx} =  \frac{1}{tan \: y.sec \: y}  \\ \frac{dy}{dx} =  \frac{1}{ \sqrt{( {sec}^{2}   \: y - 1}) .sec \: y}  \\ \frac{dy}{dx} =  \frac{1}{ |x |  \sqrt{ {x }^{2}  - 1} } \\   \therefore  \frac{d( {sec}^{ - 1}x) }{dx}  =  \frac{1}{ |x |  \sqrt{ {x }^{2}  - 1} } \\ \frac{d( {sec}^{ - 1}5x) }{dx}  =  \frac{1}{ |5x |  \sqrt{25 {x }^{2}  - 1} }\\\\y=arccos(\frac{1}{x})\Rightarrow cosy=\frac{1}{x}\\x=secy\Rightarrow y=arcsecx\\\therefore \frac{d( {sec}^{ - 1}x) }{dx}  =  \frac{1}{ |x |  \sqrt{ {x }^{2}  - 1} }

4 0
2 years ago
Write the equation of the line that passes through the points (2,−8) and (1,7). Put your answer in fully reduced point-slope for
ValentinkaMS [17]

Point-slope form of equation is: y - 7 = -15(x-1)

Step-by-step explanation:

Given points are:

(2,-8) and (1,7)

First of all we have to calculate the slope of the line

so,

m=\frac{y_2-y_1}{x_2-x_1}\\= \frac{7-(-8)}{1-2}\\=\frac{7+8}{-1}\\=\frac{15}{-1}\\= -15

Point-slope form is given by:

y-y_1 = m(x-x_1)

Putting the value of slope

y-y_1 = -15(x-x_1)

We can put any one of two given points in the equation to find the final form of point-slope form

So

Putting (1,7) in the equation

y - 7 = -15(x-1)

Hence, point-slope form of equation is: y - 7 = -15(x-1)

Reducing and simplifying

y - 7 = -15(x-1)\\y-7 = -15x+15\\y-7+7 =-15x+15-7\\y = -15x+8\\15x+y = 8

Keywords: Point-slope form, equation of line

Learn more about equation of line at:

  • brainly.com/question/6200750
  • brainly.com/question/568302

#LearnwithBrainly

8 0
3 years ago
Kameran has a one-gallon pitcher to fill with apple juice. He uses the standard ratio of one can of concentrate to 1.75 cans of
Advocard [28]

1/2.75th what I got on paper sorry if wrong
7 0
3 years ago
HELP PLEASE PLEASE SOMEONE
Mandarinka [93]

Answer: 6/37

Step-by-step explanation:

4 0
3 years ago
Enter the missing numbers separated by a comma and no spaces!
spayn [35]
Y = 1x + 2 is the answer therefore the missing number is 1,2
7 0
3 years ago
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