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3 years ago

Help plz!!!!!!!!! I need help please!!!

Mathematics

1 answer:

KengaRu [80]3 years ago

5 0

8. commutative property of multiplication
9. associative property of multiplication
10.Multiplicative Property of Zero
11.Identity Property of Multiplication
12. commutative property of addition
13.associative property of multiplication
14.Identity Property of Addition
15. commutative property of addition
16. commutative property of multiplication
17.associative property of addition
18.Identity Property of Multiplication
19.associative property of addition
20.Identity Property of Addition
21.Multiplicative Property of Zero
22.associative property of multiplication

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Find the perimeter of the figure.

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Answer:

A) 60

Step-by-step explanation:

P = 5+5+11+9+(5+11)+(9+5)

P = 60

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Find the area of the regular pentagon.

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3 years ago

If the Volume of a Cylinder is 287 and the radius is 5, what is the height "h"?

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Answer:

3.7 is the height

Step-by-step explanation:

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3 years ago

A college entrance exam company determined that a score of 24 on the mathematics portion of the exam suggests that a student is

seraphim [82]

Answer:

a) The Z -value 2.397 < 2.576 at 99% or 0.01% level of significance

Null hypothesis is accepted at 0.01% level of significance

They score is above 24 on the math portion of the exam

b)

Null Hypothesis: There is no significance difference between the college level mathematics and math courses in high school

H₀: μ = 24

Alternative Hypothesis: H₁: μ ≠ 24

Step-by-step explanation:

Step(i):-

Given random sample 'n' = 250

Given data sample mean x⁻ = 24.5

Standard deviation = 3.3

Null Hypothesis: There is no significance difference between the college level mathematics and math courses in high school

H₀: μ = 24

Alternative Hypothesis: H₁: μ ≠ 24

test statistic

$Z = \frac{x^{-} - mean}{\frac{S.D}{\sqrt{n} } }$

$Z = \frac{24.5 - 24}{\frac{3.3}{\sqrt{250} } } = \frac{0.5}{0.2087} = 2.397$

a) 99% or 0.01% level of significance

Level of significance ∝ = 0.01

$Z_{\frac{\alpha }{2} } = Z_{\frac{0.01}{2} } = Z_{0.005} =2.576$

The Z -value 2.397 < 2.576 at 99% or 0.01% level of significance

Null hypothesis is accepted at 0.01% level of significance

They score is above 24 on the math portion of the exam

b) 95% or 0.05% level of significance

Level of significance ∝ = 0.05

$Z_{\frac{\alpha }{2} } = Z_{\frac{0.05}{2} } = Z_{0.025} = 1.96$

The Z -value 2.397 > 1.96 at 95% or 0.05% level of significance

Null hypothesis is Rejected at 0.05% level of significance

They score is below 24 on the math portion of the exam

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3 years ago

Find the perimeter of a rectangle when it’s length is three times it’s width and the area is 108

Natasha2012 [34]

Answer:

Step-by-step explanation:

Let w = width

Then 3w = length

A= LW

108 = (3w)(w)

108 = 3w2

36 = w2

6 = w 18 = length Perimeter = 2(6) + 2(18) = 48 in

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3 years ago