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3 years ago

Write a addition sentence of the sum of 20

Mathematics

2 answers:

Molodets [167]3 years ago

4 0

With variables or?? 15+5=20

timurjin [86]3 years ago

3 0

Addition sentence for sum of 20:

10 + 10

This is equal to 20.

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Check MyAnswer Please!!!

jok3333 [9.3K]

The equation $x^2-9y^2=900$ <span>defines a hyperbolic cylinder.
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1. Divide the equation $x^2-9y^2=900$ by 900:
$\dfrac{x^2}{900} - \dfrac{y^2}{100} =1$ .
This is the equation of conic section when z=0 (or z=const) and that is hyperbola equation.

2. To find the domain and the range you should express y:
$\dfrac{y^2}{100} =\dfrac{x^2}{900} - 1 \\ \\ y^2= \dfrac{x^2}{9} -100 \\ \\ y=\pm \sqrt{\dfrac{x^2}{9} -100}$ .
Since you have square root,
$\dfrac{x^2}{9} -100\ge 0 \\ x^2-900\ge 0 \\ (x-30)(x+30)\ge 0 \\ x\in(-\infty,-30)\cup (30,\infty)$ . This is the domain, the range is $y\in (-\infty,\infty)$ .

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3 years ago

$3,000 after 2 years at an interest rate of 10.0% is$ Round up to the nearest cent

Art [367]

I assume that the given interest (i) is compounded. To calculate for the future worth (F) of the given present investment (P) may be calculated by the equation,
F = P x (1 + i)^n
where n is the number of years. Substituting the given values,
F = ($3000) x (1 + 0.10)^2 = $3,630
Thus, the future worth of this investment is $3,630.0

6 0

4 years ago

Jeremy drew a polygon with four right angles and four sides with the same length. Name all the polygons that he could have drawn

raketka [301]

It can only be a square

4 0

3 years ago

Read 2 more answers

What does -2.3f +0.4f-13-5 equal?

koban [17]

Answer:

-1.9f-18

Step-by-step explanation:

Evaluate like terms. (0.4f-2.3f) & (-13-5)

-2.3f+0.4f-13-5 = -1.9f-18

6 0

3 years ago

Point A is located at (-5, 2) and is reflected in the y-axis. What are the coordinates of point A'?

Ira Lisetskai [31]

When a point is reflected across the Y axis, the Y coordinate remains the same and the X coordinate becomes the opposite of the original value.

Points are written as ( X,Y)

The original point is (-5,2)

The opposite x value would be 5 and the Y value stays the same.

The reflected point would be (5,2)

The answer is B.

6 0

3 years ago