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2 years ago

Geometry math question please help

Mathematics

1 answer:

Triss [41]2 years ago

6 0

A square is a figure with four equal sides and four right angles.In a square the diagonals bisect at right angles .

In the above given options option A is the right answer.

If the diagonals of any parallelogram are perpendicular then the figure is not necessarily a square.

Diagonals are perpendicular in a rhombus too.

A square and Rhombus both have diagonals that are perpendicular.

So it is not a necessary condition for a parallelogram to be a square .

The other options are right .

So option B is the right option that if diagonals are perpendicular is not sufficient to prove the figure to be a square.

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The sum of two numbers is 20. One number is 4 less than the other. Find the numbers

exis [7]

Answer:8 and 12

Step-by-step explanation: 8 is 4 less than 12 and 12 and 8 equals 20

6 0

2 years ago

2. Garrett wants to know what percentage of students at his school would be interested in organizing a

tresset_1 [31]

Answer:

Step-by-step explanation:

This is because he would find the most students in the cafeteria. It is not A because not everyone goes to basketball games. It's not C because you're looking for where you will find the most students. And it's not D because thats local and he is trying to find how many students want to organize a club NOT random people at a movie theater.

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2 years ago

I need help with this please

lesantik [10]

2 rational numbers are C. 2.777 and D. -7/3

a rational number<span> is any </span>number<span> that can be expressed as the quotient or fraction p/q of two integers
</span>
as you know 0.7777 (7 repeat) = 7/9
so 2.777(7 repeat) = 2 7/9

4 0

2 years ago

Read 2 more answers

The formula for electrical energy, P, is P = I2R, where I is current and R is resistance. The formula for I in terms of P and R

nydimaria [60]

Answer:

$i = \sqrt{ \frac{p}{r} }$

6 0

2 years ago

A sample of students from an introductory psychology class were polled regarding the number of hours they spent studying for the

Anni [7]

Answer:

$8.68,13.16$

Step-by-step explanation:

Hint- First we have to calculate the mean and standard deviation of the sample and then applying formula for confidence interval we can get the values.

Mean of the sample is,

$\mu=\dfrac{\sum _{i=1}^{24}a_i}{24}=\dfrac{262}{24}=10.92$

Standard deviation of the sample is,

$\sigma =\sqrt{\dfrac{\sum _{i=1}^{24}\left(x_i-10.92\right)^2}{24-1}}=5.6$

The confidence interval will be,

$=\mu \pm Z\dfrac{\sigma}{\sqrt{n}}$

Here,

Z for 95% confidence interval is 1.96, and n is sample size which is 24.

Putting the values,

$=10.92 \pm 1.96\cdot \dfrac{5.6}{\sqrt{24}}$

$=10.92 \pm 2.24$

$=8.68,13.16$

Confidence interval is used to express the degree of uncertainty associated with a sample.

95% confidence interval means that if we used the same sampling method to select different samples and calculate an interval, we would expect the true population parameter to fall within the interval for 95% of the time.

5 0

2 years ago