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Colt1911 [192]
3 years ago
7

If 2x + 8 = 0, what justifies 2(x + 4) = 0?

Mathematics
1 answer:
musickatia [10]3 years ago
7 0

Answer:

2(x+4)=0

2x+8=0

8-0=2x

8/2=x

4=x

x=4

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If the measurement of angle a is 113°, then what is the measurement of angle d ? Question 20 options: 67° 23° 113° 100°
Diano4ka-milaya [45]

Answer:

67 degrees

Step-by-step explanation:

If angle a is 113 degrees, angle d will be 113 degrees subtracted from 180 degrees. Because angles in a straight line adds up to 180 degrees.

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3 years ago
The weights of the apples grown on an orchard are normally distributed. The mean weight has been m0 = 9.500 ounces. Because of t
diamong [38]

Answer:

t(s) is in rejection zone then we reject H₀.

Bad weather indeed make apples weight decrease

Step-by-step explanation:

Normal Distribution

population mean    μ₀   = 9.5 ou

sample size   =  n   =  16  then we should apply t-student table

degree of fredom   df  =  n  - 1     df =  16  -  1    df  = 15

1.-Test  hypothesis

H₀     null  hypothesis                          μ₀   =  9.5    

Hₐ alternative hypothesis                   μ₀  <  9.5

One left tail-test

2.-Confidence level 95 %

α  =  0,05    and   df  = 15    from t-student table we get  t(c)  =  - 1.761

3.-Compute t(s)  

t(s)  =  [ μ  -  μ₀  ] /√s/n         t(s)  = (9.32  -  9.5 )* √16 / 0.18

t(s)  = -  0.18*√16 / 0.18

t(s)  = - 4

4.-Compare  t(s)   and t(c)

t(s) < t(c)     -4  <  - 1.761

Then  t(s)  is in the rejection zone.

5.- Decision

t(s) is in rejection zone then we reject H₀.

Farmer conclude that bad weather make apples weight decrease

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lutik1710 [3]
The answer is 250 points, to find this just divide by 2 three times.
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Answer:

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