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3 years ago

What special marks are used to show that segments are congruent

Mathematics

2 answers:

ch4aika [34]3 years ago

7 0

The special marks that are used to show that segments are congruent would be: Hashmarks.

VladimirAG [237]3 years ago

4 0

Answer:

Hatch marks or hash marks are used to show that segments are congruent

Step-by-step explanation:

On any geometric figure, the congruency is denoted by hatch marks or hash marks.

For example - the notation to show the congruent sides of a triangle is done by using small tick marks, that show that the two sides are the same length or congruent.

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An engineer wants to know if the average amount of energy used in his factory per day has changed since last year. The factory u

m_a_m_a [10]

Answer:

The calculated value Z = 1.8823 <1.96 at 0.05 level of significance

The average amount of energy used in his factory per day has changed since last year.

Step-by-step explanation:

Step(i):-

Given that mean of the Population = 2000 (MWH)

Given that size of the sample 'n' = 400

Given that mean of sample x⁻ = 2040 MWH

Given that the standard deviation = 425 MWH per day

Step(ii):-

Null hypothesis:H₀: μ = 2000 (MWH)

Alternative Hypothesis:H₁: μ≠ 2000( MWH)

Test statistic

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

$Z = \frac{2040-2000}{\frac{425}{\sqrt{400} } }$

Z = 1.8823

The calculated value Z = 1.8823 <1.96 at 0.05 level of significance

Final answer:-

The calculated value Z = 1.8823 <1.96 at 0.05 level of significance

The average amount of energy used in his factory per day has changed since last year.

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3 years ago

At summer camp there are 52 boys 47 girls and 18 adults how many people are at summer camp

andriy [413]

All we have to do is add up the 52 boys, 47 girls and 18 adults to find the total

52 + 47 + 18 = 117

Therefore, there are 117 people at summer camp

Hope this helps

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3 years ago

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nikdorinn [45]

Answer:

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Step-by-step explanation:

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Same for paperbacks.

then we add them up to 20.

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Step-by-step explanation:

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