All categories

4 years ago

Explain why the product of two negative integers is not negative. Use (-1) ·(-1)as an example

Mathematics

2 answers:

Daniel [21]4 years ago

8 0

It will be 1, since a negative and a negative changes into a positive.

Mice21 [21]4 years ago

7 0

Answer:

Step-by-step explanation:

it will be 4

You might be interested in

Which system of inequalities is shown in the graph?

wolverine [178]

Answer:

A. y≤-x+3

y≤ x²-3x

Step-by-step explanation:

Both inequality shadings of the graphs are below the solid lines, which means that y is less than or equal to both of them.

8 0

3 years ago

How many feet per minute faster is 27 speed than 31.8 speed?

elena-14-01-66 [18.8K]

4.8 feet per min faster becuase 3.8-27.

6 0

4 years ago

Simplify:9-1÷2÷27^2÷3

sammy [17]

First let's calculate the exponents.

$27^2 : 729 = 9-1\div \:2\div \:729\div \:3$

Now we should multiply and divide.

$1\div2\div729\div3:\frac{1}{4374} = 9-\frac{1}{4374}$

Now we should add and subtract.

$9-\frac{1}{4374} :\frac{39365}{4374} = \frac{39365}{4374}$

Convert the improper fractions into mixed numbers.

$8\frac{4373}{4374}$

Answer :

$8\frac{4373}{4374}$

5 0

3 years ago

Show that ( 2xy4 + 1/ (x + y2) ) dx + ( 4x2 y3 + 2y/ (x + y2) ) dy = 0 is exact, and find the solution. Find c if y(1) = 2.

fredd [130]

$\dfrac{\partial\left(2xy^4+\frac1{x+y^2}\right)}{\partial y}=8xy^3-\dfrac{2y}{(x+y^2)^2}$

$\dfrac{\partial\left(4x^2y^3+\frac{2y}{x+y^2}\right)}{\partial x}=8xy^3-\dfrac{2y}{(x+y^2)^2}$

so the ODE is indeed exact and there is a solution of the form $F(x,y)=C$ . We have

$\dfrac{\partial F}{\partial x}=2xy^4+\dfrac1{x+y^2}\implies F(x,y)=x^2y^4+\ln(x+y^2)+f(y)$

$\dfrac{\partial F}{\partial y}=4x^2y^3+\dfrac{2y}{x+y^2}=4x^2y^3+\dfrac{2y}{x+y^2}+f'(y)$

$f'(y)=0\implies f(y)=C$

$\implies F(x,y)=x^2y^3+\ln(x+y^2)=C$

With $y(1)=2$ , we have

$8+\ln9=C$

$\boxed{x^2y^3+\ln(x+y^2)=8+\ln9}$

8 0

3 years ago

Anita earns 60 points every time she shops at a grocery store. She needs a total of

FrozenT [24]

Answer:

Step-by-step explanation:

2,580-480=2,100
2,100÷60=35
Answer=35

6 0

3 years ago

Read 2 more answers