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finlep [7]
3 years ago
11

Researchers conducted a study to determine whether magnets are effective in treating back pain. Pain was measured using the visu

al analog​ scale, and the results given below are among the results obtained in the study. Higher scores correspond to greater pain levels. Is this study an experiment or an observational​ study?
Mathematics
1 answer:
Kay [80]3 years ago
6 0

Answer:

10 step

Step-by-step explanation:

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Find two ratios equivalent to the ratio 8:5
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Solve for each equation<br> h divided by 4/9 for h = 5 1/3<br><br> A) 2 10/27<br> B) 10<br> C) 12
arsen [322]
<span>Solve for each equation
h divided by 4/9 for h = 5 1/3

   h                16/3
-------  = -----------------  
 4/9               4/9
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4 years ago
Someone please help if your smart!!​
ASHA 777 [7]

Answer:

brainly.com/question/12500028

Step-by-step explanation:

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6 0
3 years ago
Suppose the lengths of two sides of a right triangle are represented by 2x and 3 (x + 1), and the longest side is 17 units. Find
densk [106]

Answer:

x=4

Step-by-step explanation:

<u>Step 1</u>:-

given the lengths of two sides of a right angle are represented by 2x and 3(x+1) and longest side is 17 units.

AB = 2x and BC = 3(x+1) and longest side AC= 17

by using Pythagoras theorem

AC^2 = AB^2 + BC^2

<u>step 2:-</u>

The hypotenuse is longest side is AC = 17 units

(17)^2 = 4x^2 +9(X+1)^2

on simplification, we will use formula

(a + b)^2 = a^2 +2ab+b^2

289 = 4x^2 +9(x^2+2x+1)

13x^2 +18x-280 = 0

finding factors  70 X 52 = 3640

13x^2 +70x-52x-280 = 0

13x^2 -52x+ 70x-280 = 0

Taking common , we get

13x(x-4)+70(x-4)=0

x-4=0 and 13x+70=0

x=4 and 13x =-70

x=4 and x=\frac{-70}{13}

we can not choose negative value so x value is 4

Final answer:- x = 4

<u>verification:-</u>

<u></u>AC^2 = AB^2 + BC^2<u></u>

289 = 4(4)^2+9(4+1)^2

289 = 64 +9(25)

289=289

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4 years ago
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