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3 years ago

Kati brought 1/4 dozen doughnuts to school. How many doughnuts did Kati bring

Mathematics

1 answer:

Vaselesa [24]3 years ago

7 0

She brings 3 donuts because a dozen is 12 and 1/4 of 12 is 3.

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Differentiate cosec5x

Marizza181 [45]

$\dfrac{d}{dx} \csc(5x)\\\\=-\csc(5x) \cdot \cot (5x) \cdot \dfrac{d}{dx} (5x)\\\\=-5\csc(5x) \cdot \cot(5x)$

7 0

2 years ago

What is 1 8/9 written as a improperfraction

Yakvenalex [24]

To write this as an improper fraction you would multiply 9 by 1 then add your product to the numerator.
9x1=9
9+8=17
17/9
Hoped this helped!

4 0

3 years ago

Simplify to create an equivalent expression<br><br> 6(5r-11)-(5-r)

dolphi86 [110]

Answer:

B or 31r-71

Step-by-step explanation:

First, use distributive property to expand the first term.

30r-66-(5-r)

Remove the parenthesis of the third term:

30r-66-5+r

Combine like terms

31r-71

7 0

3 years ago

Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 20. Find the prob

Ipatiy [6.2K]

Answer:

Randomly selected adult has an IQ less than 136 is 0.9641

Step-by-step explanation:

It is given that, it is normal distribution with mean 100 and SD as 20.

So, let's use the formula of z-score

z= $\frac{x-mean}{SD}$

For this problem,

x= 136

Plug in this value into the formula

z-score= $\frac{136-100}{20}$

=1.8

Now, use z-score table to find the probability

Find the corresponding value for the row 1.8 and the column 0.00, we do get 0.9641

So, Randomly selected adult has an IQ less than 136 is 0.9641

3 0

3 years ago

Factorize 2x^2-5/3xy-2y^2

vladimir1956 [14]

I hope it helps you

3 0

3 years ago

Read 2 more answers