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ki77a [65]
3 years ago
12

in kick boxing, it is found that the force needed to break a board varies inversely with the length of the board. If it takes 5

lbs. of pressure to break a board 2 feet long, how many pounds of pressure will it take to break a board that is 8 feet long
Mathematics
2 answers:
I am Lyosha [343]3 years ago
6 0
20 hope that helps you
Oksana_A [137]3 years ago
5 0

Answer:

20

Step-by-step explanation:

Since we know that it takes 5lbs. to break a 2-foot longboard, we first want to figure out how many pounds it takes to break a 1foot board.

5/2=2.5

It takes 2.5 lbs to break a 1-foot board.

2.5x8=20

It would take 20lbs to break an 8-foot longboard.

Hope this helps :)

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T=2km/5km
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4 years ago
A student answered 86 problems on a test correctly and received a grade 98%. How many problems were on the test, if all the prob
irakobra [83]

Answer:

87                

Step-by-step explanation:

5 0
3 years ago
Name the ray rhat angle PQR and angle SQR share
lyudmila [28]
<span>Ray Q is the ray that angle PQR and SQR shares. Because both angles has the ray of Q.
ray refers to a line with one endpoint
P is a ray, Q is a ray, R is a ray and S is a ray. When you put them together, they form angle.

Pls. see attachment for the presentation of the angle PQR and SQR and how they share ray Q</span>



7 0
4 years ago
Prove that the max and min values of asinX + bcosX are respectively sqrt.(a^2+b^2) and -sqrt(a^2+b^2) .
strojnjashka [21]
The solution to the problem is as follows:
let y = asinx + bcosx 
<span>
dy/dx = acosx - bsinx </span>
<span>
= 0 for max/min </span>
<span>
bsinx = acosx </span>
<span>
sinx/cosx = a/b </span>
<span>
tanx = a/b </span>
<span>
then the hypotenuse of the corresponding right-angled triangle is √(a^2 + b^2) </span>

<span>the max/min of y occurs when tanx = a/b </span>
<span>
then sinx = a/√(a^2 + b^2) and cosx = b/√(a^2 + b^2) </span>
<span>
y = a( a/√(a^2 + b^2)) + b( b/√(a^2 + b^2)) </span>
<span>
= (a^2 + b^2)/√(a^2 + b^2) </span>
<span>
= √(a^2 + b^2)</span>

I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
6 0
3 years ago
600:450 and 4:3 why is it equivalant
alexira [117]

Answer:

600 ÷ 4 = 150

450 ÷ 3 = 150

The same thing either way.

They are considered proportional ratios

3 0
3 years ago
Read 2 more answers
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