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musickatia [10]
3 years ago
10

Can yall help me i really need it plz

Mathematics
2 answers:
Fofino [41]3 years ago
8 0

Answer: number 5 square number six triangle number seven heptagon number eight hexagon not regular all others are regular

Step-by-step explanation: it will take to long to answer all pages all I can do for now

PolarNik [594]3 years ago
5 0

Answer:

2. regular

3. not regular

4. octagon, regular

5. square, regular

6. triangle, not regular

7. septagon, regular

8. hexagon, not regular

P2

2. quadrilateral, regular

3. octagon, not regular

4. hexagon, regular

5. triangle, regular

6. pentagon, not regular

P3

Congruent Angles

Regular polygon

Congruent sides

1c. yes

P4

Sides: 6

Angles: 3,4,5,6

Vertices: 3,4,5,6

Sides: 9,10

Angles: 7,8,9,10

Vertices: 7,8,9,10

octagon,8,8,8

Step-by-step explanation:

in a regular polygon the sides are all the same length and the angles are all equal.

hope this helps

let me know if you have any questions

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In 1968, it cost $54,000 for a 30 second commercial during the super bowl. In 1973, the cost for a 30 second commercial was $88,
sukhopar [10]

Answer:

you idiot are you joking

6 0
3 years ago
If y varies directly as x and y = 21 when x = 5, find x when y = 42.
Lorico [155]

Answer: 10

<u>Step-by-step explanation:</u>

varies directly means: \frac{y}{x} = k

Step 1: solve for k   ⇒  \frac{21}{5} = k

Step 2: plug in the given value and k to solve for the missing value: \frac{42}{x} = \frac{21}{5}

42(5) = 21(x)

\frac{42(5)}{21} = \frac{21(x)}{21}

2(5) = x

10  = x


5 0
3 years ago
(4x+3)(2x-5)<br><br> Help please 10 points
Yanka [14]

Answer:

Step-by-step explanation:

hello :

(4x+3)(2x-5)=0

4x+3=0 or 2x-5=0

x= -3/4 or x=5/2

5 0
3 years ago
Read 2 more answers
The heights of a random sample of 50 college students showed a mean of 174.5 centimeters and a standard deviation of 6.9 centime
Minchanka [31]

Answer:

Step-by-step explanation:

Hello!

For me, the first step to any statistics exercise is to determine what is the variable of interest and it's distribution.

In this example the variable is:

X: height of a college student. (cm)

There is no information about the variable distribution. To estimate the population mean you need a variable with at least a normal distribution since the mean is a parameter of it.

The option you have is to apply the Central Limit Theorem.

The central limit theorem states that if you have a population with probability function f(X;μ,δ²) from which a random sample of size n is selected. Then the distribution of the sample mean tends to the normal distribution with mean μ and variance δ²/n when the sample size tends to infinity.

As a rule, a sample of size greater than or equal to 30 is considered sufficient to apply the theorem and use the approximation.

The sample size in this exercise is n=50 so we can apply the theorem and approximate the distribution of the sample mean to normal:

X[bar]~~N(μ;σ2/n)

Thanks to this approximation you can use an approximation of the standard normal to calculate the confidence interval:

98% CI

1 - α: 0.98

⇒α: 0.02

α/2: 0.01

Z_{1-\alpha /2}= Z_{1-0.01}= Z_{0.99} =2.334

X[bar] ± Z_{1-\alpha /2} * \frac{S}{\sqrt{n} }

174.5 ± 2.334* \frac{6.9}{\sqrt{50} }

[172.22; 176.78]

With a confidence level of 98%, you'd expect that the true average height of college students will be contained in the interval [172.22; 176.78].

I hope it helps!

4 0
2 years ago
Two shapes that represent the cross-sections
777dan777 [17]

Answer:

it's the square and the rectangle

3 0
2 years ago
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