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Pie
3 years ago
12

What is -2 1/4 plus -3/4

Mathematics
2 answers:
Yuliya22 [10]3 years ago
7 0

Answer:

-3

Step-by-step explanation:

MissTica3 years ago
7 0

Answer:

24/8

Step-by-step explanation:

it so easy just add it altogether

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Consider the function f given by f(x)=x*(e^(-x^2)) for all real numbers x.
NISA [10]

Answer:

\frac{\sqrt{\pi}}{4}

Step-by-step explanation:

You are going to integrate the following function:

g(x)=x*f(x)=x*xe^{-x^2}=x^2e^{-x^2}  (1)

furthermore, you know that:

\int_0^{\infty}e^{-x^2}=\frac{\sqrt{\pi}}{2}

lets call to this integral, the integral Io.

for a general form of I you have In:

I_n=\int_0^{\infty}x^ne^{-ax^2}dx

furthermore you use the fact that:

I_n=-\frac{\partial I_{n-2}}{\partial a}

by using this last expression in an iterative way you obtain the following:

\int_0^{\infty}x^{2s}e^{-ax^2}dx=\frac{(2s-1)!!}{2^{s+1}a^s}\sqrt{\frac{\pi}{a}} (2)

with n=2s a even number

for s=1 you have n=2, that is, the function g(x). By using the equation (2) (with a = 1) you finally obtain:

\int_0^{\infty}x^2e^{-x^2}dx=\frac{(2(1)-1)!}{2^{1+1}(1^1)}\sqrt{\pi}=\frac{\sqrt{\pi}}{4}

5 0
3 years ago
Read 2 more answers
Solve for h.<br> h − 999 = –341
scZoUnD [109]
I think h is 658 i could be wrong
8 0
3 years ago
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Which of the following terms describes the measure indicate...
o-na [289]
Hi there! The answer is D. range.

The range shows the difference between the largest and the smallest number, and the black arrow below the graph in the picture shows is this distance between the largest and the smallest number. Hence, the answer is range.
6 0
4 years ago
What numbers add up to 3 &amp; multiple to 10
Galina-37 [17]

There are no real numbers that can do that job.

The numbers are

       <em> 1.5 + i √7.75</em>
and
       <em>1.5 - i √7.75</em>

These are called 'complex numbers'.  The symbol ' i ' stands for √-1  .

==================================================

If either the ' 3 ' or the ' 10 ' was actually supposed to be negative,
then the two numbers would be<em>  2 </em> and<em>  -5 .</em>


4 0
4 years ago
Read 2 more answers
Helppppp meeee plzzzzz
andrew-mc [135]

Answer:

∠B = 41°

Step-by-step explanation:

∠BCD is an exterior angle of the triangle

The exterior angle of a triangle is equal to the sum of the 2 opposite interior angles.

∠A and ∠ B are the 2 opposite interior angles, hence

∠A + ∠B = 113, that is

72 + ∠B = 113 ( subtract 72 from both sides )

∠B = 41°


3 0
3 years ago
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