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4 years ago

Need help easy geometry for braiinliest

Mathematics

1 answer:

Pavel [41]4 years ago

6 0

Answer:

You are right, a Kite has only one diagonal bisected.

Step-by-step explanation:

You are right, a Kite has only one diagonal bisected.

All the others have 2 diagonals getting bisected.

parallelograms, rectangles and rhombuses have 2 diagonals bisected

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Solve 2 a 2 − 5 a − 25 = 0 by factoring. Enter your answers below a = or a =

kaheart [24]

Answer:

a=5, a=-2.5

Step-by-step explanation:

Given:

$2 a^2 - 5 a - 25 = 0$

Solution:

$a_{1,\:2}=\frac{-\left(-5\right)\pm \sqrt{\left(-5\right)^2-4\cdot \:2\left(-25\right)}}{2\cdot \:2}$

$a_{1,\:2}=\frac{-\left(-5\right)\pm \:15}{2\cdot \:2}$

$a_1=\frac{-\left(-5\right)+15}{2\cdot \:2},\:a_2=\frac{-\left(-5\right)-15}{2\cdot \:2}$

$a=5,\:a=-2.5$

~Lenvy~

4 0

2 years ago

10.

Kay [80]

Answer:

$\frac{(82)(2.4)^2}{104.139} \leq \sigma^2 \leq \frac{(82)(2.4)^2}{62.132}$

$4.535 \leq \sigma^2 \leq 7.602$

Now we just take square root on both sides of the interval and we got:

$2.2 \leq \sigma \leq 2.8$

And the best option would be:

A. 2.2 < σ < 2.8

Step-by-step explanation:

Information provided

$\bar X=32.1$ represent the sample mean

$\mu$ population mean

s=2.4 represent the sample standard deviation

n=83 represent the sample size

Confidence interval

The confidence interval for the population variance is given by the following formula:

$\frac{(n-1)s^2}{\chi^2_{\alpha/2}} \leq \sigma^2 \leq \frac{(n-1)s^2}{\chi^2_{1-\alpha/2}}$

The degrees of freedom are given by:

$df=n-1=83-1=82$

The Confidence is given by 0.90 or 90%, the value of $\alpha=0.1$ and $\alpha/2 =0.05$ , the critical values for this case are:

$\chi^2_{\alpha/2}=62.132$

$\chi^2_{1- \alpha/2}=104.139$

And replacing into the formula for the interval we got:

$\frac{(82)(2.4)^2}{104.139} \leq \sigma^2 \leq \frac{(82)(2.4)^2}{62.132}$

$4.535 \leq \sigma^2 \leq 7.602$

Now we just take square root on both sides of the interval and we got:

$2.2 \leq \sigma \leq 2.8$

And the best option would be:

A. 2.2 < σ < 2.8

3 0

3 years ago

What is the value of m?

Gnesinka [82]

M=18

explication: both of the angles are 90 degrees, 90-33=57, 3(18)+3=57

8 0

3 years ago

Read 2 more answers

Jonathan is making his favorite pasta dish he served his mom 1/12 of the pot of pasta and his brother 1/6 of the pot. how much o

Serjik [45]

3/4
1/6 of the pot is 2/12
1/12 + 2/12 is 3/12
1 - 3/12 is 9/12 = 3/4

3/4 of the pot is left over

5 0

3 years ago

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Which point is located in Quadrant ll

katrin [286]

Answer:

(4,5)

Step-by-step explanation:

If you count the quadrants 1 and 2

3 and 4

3 0

3 years ago

Read 2 more answers