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3 years ago

How do i solve this pls

Mathematics

1 answer:

miskamm [114]3 years ago

7 0

First we would solve both x’s
3x^2 - 5x
But 3 has the thingy thing (forgot the name haha)
Which means you have to multiply it by itself that many times which would be
3x3=9
So now it would be
9x- 5x = 4x
Which leaves 7 and 4x

Now you may subtract those two

7-4x= 3x

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Left-handedness occurs in about 12% of all Americans. Males are slightly more likely than females to be left-handed, with 13% of

FinnZ [79.3K]

Answer:

a)Both X and Y can be well approximated by normal random variables.

Step-by-step explanation:

For each individual, there are only two possible outcomes. Either they are right-handed, or they are left-handed. This means that we can solve this problem using concepts of the binomial probability distribution.

Binomial probability:

Probability of exactly x sucesses on n repeated trials, with probability p.

The binomial probability can be well approximated by normal random variables, using the expected value $E(X) = np$ and the standard deviation $\sigma = \sqrt{np(1-p)}$

Let X be the number of males (out of the 100) who are left-handed.

$n = 100$ and $p = 0.13$ . Can be well approximated.

Let Y be the number of females (out of the 80) who are left-handed.

$n = 80$ and $p = 0.11$ . Can be well approximated.

The correct answer is

a)Both X and Y can be well approximated by normal random variables.

5 0

3 years ago

I’m confused on this one

Mashutka [201]

Greetings!

The formula for the area of any triangle is as followed:

$A_{triangle}=\frac{bh}{2}$

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<u>Let Statements:</u>

Let the variable...

→ $b$ represent the length of the base of the triangle

→ $h$ represent the length of the height of the triangle

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Using the information provided from the question, we can substitute its values in place of the variables and solve for the last remaining variable:

$10=\frac{(4)(x+3)}{2}$

Distribute the parenthesis<em> (The Distributive Property) </em>:

$10=\frac{((4)(x)+(4)(3))}{2}$

$10=\frac{4x+12}{2}$

Reduce the fraction to lowest terms:

$10=2x+6$

Add -6 to both sides of the equation:

$(10)+(-6)=(2x+6)+(-6)$

$4=2x$

Divide both sides of the equation by 2:

$\frac{4}{2}=\frac{2x}{2}$

$2=x$

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The Answer to this Problem is:

$\boxed{x=2}$

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I hope this helped!

-Benjamin

5 0

3 years ago

Each of Sunil's beagle puppies weighs less than 11.3 oz at birth.

solmaris [256]

Answer:

11.3 > b

Step-by-step explanation:

this is because , the puppies weigh less than the value. It can also be written as b < 11.3

7 0

3 years ago

A circle with radius of 1 cm sits inside a 11 cm x 12 cm rectangle. What is the area of the shaded region? Round your final answ

charle [14.2K]

Answer:

sry I just wanted the points I'm in middle school so I don't know this stuff either but can you give free brainlyest I'm soo close to my next rank I'd really appreciate it if you would

5 0

3 years ago

Pls answer this!!!!!!

jeka94

Answer:

Yes, because the total will be 51.50.

Step-by-step explanation:

3.75x3+6.50x4+14.25=51.50

4 0

3 years ago

Read 2 more answers

How do i solve this pls​

How do i solve this pls