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Alenkinab [10]
4 years ago
13

Find the product of each sum and difference. (21+9)(21-9)

Mathematics
1 answer:
Natalka [10]4 years ago
8 0

30 12

Step-by-step explanation:

21 + 9 equals 30 21 - 9 equals 12

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Which sequence of transformations will map figure K onto figure K′? Two congruent kites, figure K and figure K prime, are drawn
elixir [45]

Answer:

The sequence of transformations will map figure K onto figure K′

is the first sequence <u>option (1)</u>

======================================================

Step-by-step explanation:

See the attached figure

as shown in the figure the K' is the image of K by reflection over x-axis

<u>But </u> We need to know which sequence of transformations will give the same result.

So, we will test the options by any point from K and its image from K'

i.e: we will test the options using the points (6,5) , (6,-5)

(6,5) ⇒ (6,-5)

<u>option (1):</u>

Reflection across x = 4, 180° rotation about the origin, and a translation of (x + 8, y)

(6,5) ⇒ (2,5) ⇒(-2,-5) ⇒ (6,-5)

<u>option (2):</u>

Reflection across x = 4, 180° rotation about the origin, and a translation of (x − 8, y)

(6,5) ⇒ (2,5) ⇒(-2,-5) ⇒ (-10,-5)

<u>option (3):</u>

Reflection across y = 4, 180° rotation about the origin, and a translation of (x + 8, y)

(6,5) ⇒ (6,3) ⇒ (-6,-3) ⇒ (2,-3)

<u>option (4):</u>

Reflection across y = 4, 180° rotation about the origin, and a translation of (x − 8, y)

(6,5) ⇒ (6,3) ⇒ (-6,-3) ⇒ (-14,-3)

As shown: The sequence of transformations will map figure K onto figure K′

is the first sequence <u>option (1)</u>

7 0
4 years ago
Read 2 more answers
Rectangle JKLM is reflected across the x-axis and then the y-axis. The point I was
Sunny_sXe [5.5K]

Reflection involves mirroring a point over a line.

<em>When L is reflected across the x and y axes, the new coordinates are (7,3)</em>

Given that:

(x,y) \to (-7,-3)

When a point is reflected across the x-axis, the rule is:

(x,y) \to (x,-y)

So, we have:

(-7,-3) \to (-7,3)

When a point is reflected across the y-axis, the rule is:

(x,y) \to (-x,y)

So, we have:

(-7,3) \to (7,3)

Hence, the new coordinates of L are (7,3)

Read more about reflections at:

brainly.com/question/17983440

8 0
3 years ago
In a 40-day period, at least one bear was observed by a camper in a designated camp site on 28 separate days. According to this
olasank [31]
<span>At least one bear was sighted on 28 separate days in 40 day period total = 28/40
We're looking for the daily frequency of bear sightings, that's in the whole 40 day period. 

Let's say 40 days period = 100%.
Then what's 28 days?
</span>

So the solution we're looking for would be (<span><span>28 days∗100) / </span>40 days = 70%</span>

The final answer is B. 70%.

<span>
</span>

5 0
3 years ago
Read 2 more answers
A brick weighs w kg. Write an expression for the weight of 12 bricks.
Mama L [17]
12 bricks is equal to 12w kg. Hope this helps!
4 0
3 years ago
What is the answer to 18+4•3?
Maksim231197 [3]
Hey!
Let’s get that equation answered!

First, we’ll multiply.

4•3= 12

Thus we change the equation.

18+12= ?

Now we will add the two numbers.

18+12= 30

Your answer is 30.
5 0
3 years ago
Read 2 more answers
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