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irinina [24]
2 years ago
11

Cuando un poligono puede ser concavo o convexo

Mathematics
1 answer:
Verdich [7]2 years ago
4 0
<span>Para que un polígono sea convexo, todos sus ángulos interiores deben ser inferiores a 180 grados</span>
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a registered nurse working in an operating room earns $958.40 for a 40 hour week. a surgicak technician earns $685.60 for a 40 h
Tema [17]
Long story short it cost. alot!!!!...


3 0
2 years ago
A classroom has stadium seating. There are 10 seats in the first row, 13 seats in the second row, 16 seats in the third row and
Nikolay [14]
The right answer is “The classroom has 5,180 seats “
3 0
3 years ago
6+5 x 2 +5+ = <br><br> 67 +84 - 12 x 4 = 16
lozanna [386]

Answer:

6+(5 x 2)+5=21

the way you wrote this was kinda weird so I don't know what you expected as an answer

Step-by-step explanation:

5 x 2=10

10+6=16

16+5=21

21

3 0
3 years ago
How literal equations and formulas are related
Margaret [11]

Answer:

A literal equation is an equation which consists primarily of letters. Formulas are an example of literal equations.

5 0
2 years ago
A study was conducted to determine if the salaries of elementary school teachers from two neighboring districts were equal. A sa
Semenov [28]

Answer:

H₀: μ₁ - μ₂ = 0

H₁: μ₁ - μ₂ ≠ 0

(–2975, 175)

Do not reject H₀

Step-by-step explanation:

Hello!

The objective of this experiment is to test if the salaries of elementary school teachers are equal in two districts. You can test this trough the population means of the salaries of the teachers if they are either equal or different or directly test if the difference between the salaries of the two districts is cero or not, symbolically: μ₁ - μ₂ = 0

Remember, in the null hypothesis is usually stated the known information, is the "no change" premise and always carries the = symbol.

The hypothesis is:

H₀: μ₁ - μ₂ = 0

H₁: μ₁ - μ₂ ≠ 0

You have two normally distributed variables and you are studying the difference of the means. You can use a pooled Z to make the interval, the formula is:

X[bar]₁-X[bar]₂ ± Z_{1-\alpha /2}*(√(σ₁²/n₁+σ₂²/n₂)

Since the test is two-tailed and at a signification level of 5% I've made the interval at the complementary confidence level of 95% so that I can use it to decide over the hypothesis.

X[bar]₁-X[bar]₂ ± Z_{1-\alpha /2}*(√(σ₁²/n₁+σ₂²/n₂)

Z_{1-\alpha /2} = Z_{0,975} = 1,96

[28900-30300 ± 1.96*(√((2300)²/15+(2100)²/15)]

[-1400 ± 1576,15]

[-2976.15;176,15]

Since I've approximated to two decimal units in the intermediate calculations, the values ​​differ slightly, but the interval is:

(–2975, 175)Now, since the 0 is contained in the Confidence interval, the decision is to not reject the null hypothesis. In other words, the difference in average salaries between the two districts is cero.

I hope it helps!

4 0
2 years ago
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