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2 years ago

Pls help math question 100 points NO SPAM

Mathematics

2 answers:

bija089 [108]2 years ago

7 0

Step-by-step explanation:

U2 = 7

U1 = 35/2

r = 7 ÷ 35/2

r = 7 × 2/35

r = 14/35

r = 2/5

Semmy [17]2 years ago

3 0

Answer:

I cannot see the question

Step-by-step explanation:

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I need help I don’t understand and I need to show my work who would help me??

stich3 [128]

Answer: b

Step-by-step explanation:

In the last question, you wrote on a second equation "13x ...." kkk

Let's go:

We have to check each one answer in the following system:

x - 2y = 7

3x + 7y = 8

I can use the substituition method to solve this system...

x = 7 + 2y

3x + 7y = 8

3(7 + 2y) + 7y = 8

21 + 6y + 7y = 8

13y = 8 - 21

13y = -13

y = -1

x = 7 + 2.(-1)

x = 5

Finally, the correct answer is the second one (letter b).

5 0

3 years ago

Read 2 more answers

Not sure what the student did wrong here.

yanalaym [24]

There all correct ....

6 0

3 years ago

Read 2 more answers

Need help real quick!!!

ExtremeBDS [4]

Answer:

what help you needed. ??

5 0

3 years ago

A particle is moving along the x-axis so that its position at t ≥ 0 is given by s(t)=(t)ln(5t). Find the acceleration of the par

lyudmila [28]

Answer:

$a(\frac{1}{5e})=5e$

Step-by-step explanation:

we are given equation for position function as

$s(t)=tln(5t)$

Since, we have to find acceleration

For finding acceleration , we will find second derivative

$s'(t)=\frac{d}{dt}\left(t\ln \left(5t\right)\right)$

$=\frac{d}{dt}\left(t\right)\ln \left(5t\right)+\frac{d}{dt}\left(\ln \left(5t\right)\right)t$

$=1\cdot \ln \left(5t\right)+\frac{1}{t}t$

$s'(t)=\ln \left(5t\right)+1$

now, we can find derivative again

$s''(t)=\frac{d}{dt}\left(\ln \left(5t\right)+1\right)$

$=\frac{d}{dt}\left(\ln \left(5t\right)\right)+\frac{d}{dt}\left(1\right)$

$=\frac{1}{t}+0$

$a(t)=\frac{1}{t}$

Firstly, we will set velocity =0

and then we can solve for t

$v(t)=s'(t)=\ln \left(5t\right)+1=0$

we get

$t=\frac{1}{5e}$

now, we can plug that into acceleration

and we get

$a(\frac{1}{5e})=\frac{1}{\frac{1}{5e}}$

$a(\frac{1}{5e})=5e$

5 0

3 years ago

Use a table to write a proportion<br><br> Am I correct, or do I need to switch 6 and 8?

olga2289 [7]

Answer:

Yes I believe that is correct.

Step-by-step explanation:

Im not sure why the m is first because it would be 180 miles first but I think you are correct, I think you should wait for another answer tho because I am not 100 percent sure. :)

4 0

3 years ago