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3 years ago

Describe in your own words what it means to say that integers are closed under addition? (please help I don't get this question)

Mathematics

1 answer:

Naddik [55]3 years ago

8 0

A set that is closed under an operation or collection of operations is said to satisfy a closure

property.

For example, the set of even integer is closed under addition, but the set of odd integer is not.

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A 4. What is the measurement of this angle? • 130 • 120 • 140 • 100

Whitepunk [10]

Answer:

120 deg

Step-by-step explanation:

I put an image of 120 deg down below.

Try comparing those two

6 0

2 years ago

Read 2 more answers

PLEASE HELP ASAP!!! CORRECT ANSWERS ONLY PLEASE!!! Graph g(x) = 3x^2 - 12x - 3

Paul [167]

Answer: Vertex = (2, -15) 2nd point = (0, -3)

Step-by-step explanation:

g(x) = 3x² - 12x - 3

= 3(x² - 4x - 1)

a=1 b=-4 c=-1

Find the x-value of the vertex by using the formula for the axis of symmetry: $x = \dfrac{-b}{2a}$

$x = \dfrac{-(-4)}{2(1)}$

$= \dfrac{4}{2}$

= 2

Find the y-value of the vertex by plugging the x-value (above) into the given equation: g(x) = 3x² - 12x - 3

g(2) = 3(2)² - 12(2) - 3

= 12 - 24 - 3

= -15

So, the vertex is (2, -15) ← PLOT THIS COORDINATE

Now, choose a different x-value. Plug it into the equation and solve for y. I chose x = 0

g(0) = 3(0)² - 12(0) - 3

= 0 - 0 - 3

= -3

So, an additional point is (0, -3) ← PLOT THIS COORDINATE

5 0

3 years ago

What is 3,989.23655 rounded to the nearest one thousandth?

Xelga [282]

The 6 is in the thousandth place so you round with that being the last number
since we have a 55 after the 6, we round up
so we get
3,989.237

8 0

3 years ago

Juan has 20 books to sell. He sells the books for $15 each.

Anastaziya [24]

Answer:

Well u would multiply 20 x 15 to find out the highest if the range which is 300 . So that knocks it down to B or D. But since they're $15 each, It would be based of the multiples of 15 making your answer B .

The range is all the y values.....or the f(x) values .

So the practical range would be the multiples of 15 between 0 and 300,Inclusive .

<h2>Hope this helps you!! </h2>

5 0

2 years ago

2. Write an equation in slope intercept form with the given Information Goes through points (1, 8) and (5, 0)

pantera1 [17]

Answer:

$y = -2x + 10$

Step-by-step explanation:

Slope: $m = \frac{y_{2}-y_{1} }{x_{2}-x_{1}}$

Slope-Intercept Form: $y=mx+b$

$m=\frac{8-0}{1-5}$

$m = -2$

$y = -2x + b$

$0 = -2 (5)+b$

$0=(-10)+b$

$b = 10$

$y = -2x + 10$

8 0

2 years ago