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Makovka662 [10]
2 years ago
6

Solve for x: 5x + 13 = 1/3(9x – 6) + 7x

Mathematics
1 answer:
Bezzdna [24]2 years ago
3 0

Step-by-step explanation:

5x + 13 = 1/3(9x – 6) + 7x

5x + 13 = 3x-2+7x

5x-3x= -2-13

2x= -15

x= -7.5

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The highest point in colorado is mount elbert, at 14,433 feet.About how many miles is that
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2.7335227 because you know how ,any ft. are in 1 mile so you just multiply :)
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3 years ago
Scientific notation <br> 0.000003408 =
o-na [289]

Answer:

3.408 × 10-6 i think

Step-by-step explanation:

6 0
3 years ago
Pilates is a popular set of exercises for the treatment of individuals with lower back pain. The method has six basic principles
Bas_tet [7]

Answer:

a) We reject H₀     We find difference between the mean of the two groups

b) we accept H₀ : There is no statistical difference  ( in the scale of pain) when the difference in samples means is 1

Step-by-step explanation:

Group 1: Only with educational material

Sample size     n₁  =  42

Sample mean   x₁  =  3,2

Sample standard deviation  s₁  =  2,3

Group 2: With exercises with the treatment of individuals

Sample size    n₂   =  42

Sample mean    x₂  = 5,2  

Sample standard deviation   s₂  = 2,3

Test Hypothesis

Null Hypothesis                     H₀           x₂  -  x₁  = 0  or    x₁  =  x₂

Alternative Hypothesis         Hₐ           x₂  -  x ₁ > 0  or    x₂  >  x₁

Significance level  α  = 0,01

Sample sizes are n₁  =  n₂  >  30

We use z-test

for α  = 0,01     z(c)  ≈  2,32

To calculate z(s)

z(s)  =  (  x₂  -  x₁ ) / √ (2,3)²/42  + (2,3)²/42

z(s)  = ( 5,2  -  3,2 )/ √0,2519

z(s)  =  2 / 0,5

z(s) = 4

Comparing  z(s)  and z(c)

z(s) > z(c)

z(s) is in the rejection region. We reject H₀ the true average pain level for the control condition exceeds that for the treatment condition.

b) Does the true average pain level for the control condition exceed that for the treatment condition by more than 1.

In this case

z( s) =  x₂ - x₁ / 0,5

z(s) =  1 /0,5

z(s) = 2

Comparing z(s) and z(c)  now

z(s) < z(c)        2 < 2,32

And z(s) is in the acceptance region ( for the same significance level) and we should accept H₀  equivalent to say that the two groups statistical have the same mean

5 0
3 years ago
The Bobcats football coach logged the following yardage gains and losses over four plays of a game.
lions [1.4K]
Answer:
9.8x - 11.1x
Explanation:
25 - 5.2 = 9.8x
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Notice: I’m not sure but if it wrong, you could replaced with 10x - 11y which be better answer
5 0
2 years ago
A square sheet of art paper has an area of 625 square inches. What is the minimum side length of an easel that supports the whol
Mila [183]
If the area of the paper is 625 sq in, the length of one side of this square is sqrt(625 sq in), or 25 inches.  That's the min. side length of an easel that is to support the whole sheet of paper along its lowest side.
7 0
3 years ago
Read 2 more answers
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