3 years ago

How many sides does a parallelogram have?

1 answer:

4 0

I'll give you a hint. A rectangle, a rhombus, and a square are all types of parallelograms. How many sides do they all have? Should come to you quick, good luck^^

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Can anyone help please? No links cause I can’t see them.

tamaranim1 [39]

Answer:

Step-by-step explanation:

you have a right triangle with the hypotenuse of 41 and another side of 40

a= $\sqrt{41^2-40^2}$ = $\sqrt{1681-1600}$ = $\sqrt{81}$

a=9

5 0

3 years ago

Find the variance of this probability distribution. Round to two decimal places.

attashe74 [19]

Answer:

Variance = 4.68

Step-by-step explanation:

The formula for the variance is:

$\sigma^{2} =\frac{\Sigma(X- \mu)^{2}}{N} \\or \\ \sigma^{2} =\frac{\Sigma(X)^{2}}{N} -\mu^{2} \\$

Where:

$X: Values \\\mu: Mean \\N: Number\ of\ values$

The mean can be calculated as each value multiplied by its probability

$\mu = 0*0.4 + 1*0.3 + 2*0.1+3*0.15+ 4*0.05=1.15$

$\frac{\Sigma (X)^{2}}{N} =\frac{(0^{2}+1^{2}+2^{2}+3^{2}+4^{2})}{5} =6$

Replacing the mean and the summatory of X:

$\sigma^{2} = \frac{\Sigma(X)^{2}}{N} -\mu^{2} \\= 6 - 1.15^{2}\\= 4.6775$

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3 years ago

$650 is invested in an account at 3% simple interest per year. Write an explicit formula representing the account balance in any

mixer [17]

The correct answer is 1,950

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3 years ago

Which equation has the steepest graph

Serggg [28]

I know it is between b and c i am not sure cause they are both similar in the way they look but if i had to choose maybe B
sorry if its wrong, then its c

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3 years ago

Read 2 more answers

(x + y + 3)(x + y - 4) multiplying polynomials

Yuliya22 [10]

X^2 + 2xy + -x + y^2 + -y + -12

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3 years ago