What isbthe estimate of 27,865

Which shows the use of the associative property?

irina1246 [14]

Answer:

The Second One or B. You were correct.

Step-by-step explanation:

The associative property is when the numbers of an equation stay the same, but the parentheses move.

6 0

3 years ago

If you know how to do this pls help thankyou!

dmitriy555 [2]

Answer : 49

I hope you understand sorry for the ugly writing

4 0

3 years ago

I need help on 1/2/3/4

vaieri [72.5K]

You may need to sit down with your parents or with your teacher and
go over how to add and subtract fractions.

1). "Perimeter" means the distance all the way around the square.
With a square, all 4 sides are the same length. With this square,
every side is 1-1/4 inches long.

Perimeter = length of all 4 sides= (1-1/4) + (1-1/4) + (1-1/4) + (1-1/4) =

 (1 + 1 + 1 + 1) + (1/4 + 1/4 + 1/4 + 1/4) =

 4 + 4/4 = 5 inches .

2). (2-3/8) + (1-7/8) = (2 + 1) + (3/8 + 7/8) =

 (3) + (10/8) =

 3 + 1-1/4 = 4-1/4 .

3). The difference is (1-1/6) minus (5/6) .

Before you start to do the subtraction, write the (1-1/6) as (7/6) .

Then the subtraction is (7/6) - (5/6) = 2/6 = 1/3 .

4). This one is almost the same kind of problem as #3.
It's another subtraction.

If you need (2-1/4) all together, and you already have (1-3/8),
then the amount you still have to find, or borrow, or buy, is the
difference between those two numbers.

 (2-1/4) minus (1-3/8) .

The trick is to write the (2-1/4) in some form that you'll be able to
subtract (1-3/8) from it. When I learned how to do that, it was called
'borrowing', but I think now it's called 'regrouping'.

We need to work on (2-1/4):

-- take 1 from the 2, and change it into fourths.

 2-1/4 = 1 and 4/4 and 1/4 = 1 and 5/4

-- Now, take those 5/4, and turn them into eighths.
 Each fourth makes 2 eighths. So 5/4 = 10/8.

Now, the (2-1/4) has turned into 1-10/8 .
We did NOT change the value. It's still the same amount
as 2-1/4 , but it's just written in a different way.
And now the subtraction is easy:

 (2-1/4) minus (1-3/8) =

 (1-10/8) minus (1-3/8) = (zero and 7/8).

You need 7/8 inch more string than you already have.

5 0

3 years ago

Please help me answer this question

avanturin [10]

By direct substitution and simplification, the trigonometric function z = cos (2 · x + 3 · y) represents a solution of the partial differential equation $\frac{\partial^{2} t}{\partial x^{2}} - \frac{\partial^{2} t}{\partial y^{2}} = 5\cdot z$ .

<h3>How to analyze a differential equation</h3>

Differential equations are expressions that involve derivatives. In this question we must prove that a given expression is a solution of a differential equation, that is, substituting the variables and see if the equivalence is conserved.

If we know that $z = \cos (2\cdot x + 3\cdot y)$ and $\frac{\partial^{2} t}{\partial x^{2}} - \frac{\partial^{2} t}{\partial y^{2}} = 5\cdot z$ , then we conclude that:

$\frac{\partial t}{\partial x} = -2\cdot \sin (2\cdot x + 3\cdot y)$

$\frac{\partial^{2} t}{\partial x^{2}} = - 4 \cdot \cos (2\cdot x + 3\cdot y)$

$\frac{\partial t}{\partial y} = - 3 \cdot \sin (2\cdot x + 3\cdot y)$

$\frac{\partial^{2} t}{\partial y^{2}} = - 9 \cdot \cos (2\cdot x + 3\cdot y)$

$- 4\cdot \cos (2\cdot x + 3\cdot y) + 9\cdot \cos (2\cdot x + 3\cdot y) = 5 \cdot \cos (2\cdot x + 3\cdot y) = 5\cdot z$

By direct substitution and simplification, the trigonometric function z = cos (2 · x + 3 · y) represents a solution of the partial differential equation $\frac{\partial^{2} t}{\partial x^{2}} - \frac{\partial^{2} t}{\partial y^{2}} = 5\cdot z$ .

To learn more on differential equations: brainly.com/question/14620493

#SPJ1

3 0

2 years ago

What is the equation of the line?

ki77a [65]

Answer:

y=1/2+2

Step-by-step explanation:

go up 1 and right 2 thats how you get 1/2 also its 2 point above the orgin so its +2

remember y=x+b 1/2 is the x(slope) and 2 is b