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AnnyKZ [126]
3 years ago
7

Write an expression for "the difference of 6 and k.

Mathematics
1 answer:
zloy xaker [14]3 years ago
6 0

Answer: 6 - k

Step-by-step explanation:

Difference means subtraction

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A student group claims that first-year students at a university must study 2.5 hours (150 minutes) per night during the school w
AlekseyPX

Answer:

We have strong evidence that on average, students study less than 150 minutes per night during the school week

Step-by-step explanation:

Normal distribution:

mean     μ₀ = 150

Sample:

Sample size    n = 272

Sample mean   x = 141

Sample standard deviation  s  = 66

The standard error of the sample mean  SE = σ /√n

SE = 66/√272

SE = 66 / 16,49

SE = 4

Test Hypothesis:

Null hypothesis                            H₀             x  =   μ₀

Alternative hypothesis                Hₐ            x <    μ₀

z(s)  test statistics is:

z(s)  =  ( x  -  μ₀ ) / s/√n

z(s) = - 9 /4

z(s) =  -  2,25

p-value  for that z(s)      p-value  = 0,0122

Then for α =  0,05 p-value < 0,05

We are in the rejection region we need to reject H₀

7 0
3 years ago
Why the following triangles are congruent!
dimaraw [331]

Answer:

Because the sides BO and MA are marked with one line through the middle, which means those sides are congruent, angle A and Angle O are marked with one line, the angles are congruent, and angles W and N are marked with two lines, which means they are congruent. Therefore the triangles are congruent

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3 years ago
Which of the following is irrational?
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Answer
<span>C. root 3 + 8.486</span>
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3 years ago
Lines l and m are intersected by transversal t and l // m. If m​
marissa [1.9K]

Answer:

angle 7 is 112

Step-by-step explanation:

angles 2 and 6 are congruent, and vertical angles are also congruent, so you know that angles 2 and 7 have the same value

4 0
3 years ago
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