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3 years ago

I need help with Geometry

Mathematics

2 answers:

I am Lyosha [343]3 years ago

8 0

Answer: 180 degrees

Imagine you had a long and flat rectangle. If we spin it around the center, we can rotate it 180 degrees so it lines up with its original image. The before and after is the same. We say it has rotational symmetry, and the angle of rotation is 180 degrees. This is the smallest rotational angle possible for rectangles that aren't squares.

valkas [14]3 years ago

4 0

Answer:

180 degrees since only two opposite sides are congruent in a rect, which would require you to flip it 180 degrees for it to map onto itself

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Shane and Abha earned a team badge that required their team to collect no less than 2000 cans for recycling. Abha collected 178

kompoz [17]

Answer: [911,∞)

Step-by-step explanation:

Given: S be the number of cans collected by Shane.

Since, Abha collected 178 more cans than Shane did.

Then, the number of cans collected by Abha = S+178

Also, Shane and Abha earned a team badge that required their team to collect no less than 2000 cans for recycling.

So, $S+178+S\geq2000$

$\\\Rightarrow\ 2S\geq2000-178\\\Rightarrow2S\geq1822\\\Rightarrow\ S\geq911$

Hence, the solution set of the inequality will be [911,∞)

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3 years ago

an urn containing n balls can be represented by the set u = {b1, b2, ... , bn}. interpret the following algorithm in the context

kati45 [8]

The algorithm prints out all the possible ways to draw 3 balls in sequence, ---Select--- with replacement. It prints lines.

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3 years ago

A bag contains 5 blue, 3 red, 6 green, 9 orange, and 20 black marbles. What is the ratio of the number of blue marbles to the nu

barxatty [35]

Answer:

Step-by-step explanation:

blue+green=15

blue is 5

5 to 15

4 0

3 years ago

Read 2 more answers

After a concert for 1600 people, only eight people said they would not go to see the band again what percentage of the people wh

Art [367]

Answer:

0.5%

Step-by-step explanation:

That percentage would be:

8 people

--------------------- = (1/200) = 0.005 multiplied by 100% yields 0.5%

1600 people

7 0

3 years ago

-x^2+4x-8 axis of symmerty

V125BC [204]

Answer:

$\boxed {\boxed {\sf x=2}}$

Step-by-step explanation:

The axis of symmetry can be calculated using the formula:

$x=\frac{-b}{2a}$

First we must determine a and b from the quadratic: $-x^2+4x-8$ . This is in standard form, with the highest power first in descending order.

Standard form is also: $ax^2+bx+c$

If we compare this to the quadratic given, we can conclude that:

$a= -1 \\b= 4 \\c= -8$

Substitute the values for a and b into the formula.

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

Multiply in the denominator.

$x=\frac {-4}{-2}$

Divide.

$x=2$

This can also be determined from the graph. It is the x-coordinate of the vertex or the maximum/minimum. It divides the quadratic into 2 symmetrical halves.

8 0

3 years ago