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stiv31 [10]
3 years ago
14

I don't get this question plz help

Mathematics
1 answer:
andre [41]3 years ago
5 0
X is 45°
Y is 80°
Z is the difference of 180° and (80°+45°)
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Pre image ABCD was dilated to be image A’B’C’D, where the center of dilation is the origin. What scale factor was used in the di
ArbitrLikvidat [17]

Answer:

The scale factor is 0.25

Step-by-step explanation:

we know that

The dilation is a non-rigid transformation that produce similar figures

If two figures are similar, then the ratio of its corresponding sides is proportional and this ratio is called the scale factor

In this problem

ABCD and A'B'C'D' are similar

therefore

\frac{A'B'}{AB}=\frac{B'C'}{BC}=\frac{C'D'}{CD}=\frac{A'D'}{AD}

Find the scale factor

Looking at the graph

we have

A'B'=1\ unit\\AB=4\ units

Let

z ---> the scale factor

z=\frac{A'B'}{AB}

substitute the values

z=\frac{1'}{4}=0.25

8 0
2 years ago
Please help and explain please !!!!!!
weeeeeb [17]


The answer for number one is 4. 

How do you simplify the square root of 4? It's simple. What times itself equals 4?   The answer would be 2! And because its √4×√4 it is simplified into 2×2=4

For number 2  the same thing applies. What times itself equals 12?

This one is a little tricky because it is not a perfect square (like how √4 is.)

But the square root of 12 is 3.46, which we can round to about 3.5.

Now what is the square root of 6? Once agian it is not a perfect root so the answer will be a decimal. 2.44 or rounded to 2.45. 

Now what is 3.5 × 2.45? Answer is the answer is about 8.57 or rounded
 8.60.

For the third question what is the square root of 7? The answer would be  about 2.65.
Remember PEMDAS. Parenthesis, exponents, multiply, divide, add, subtract. (yeah you know this:)
First comes parenthesis. SO 1 minus 2.65 is equal to  - 1.65.
Next set of parenthesis is 1+ the square √7 so it would be the opposite of what we just did. So 1 plus 2.65. That equals 3.65.

Now when there are 2 sets of parenthesis next to eachother )( 
That means we need to MULTIPLY the two sides.
So 
-1.65 × 3.65 ≈  - 6.

Last but not least Number 30. It might look scary but  its not.

What is the square root of 2? 
Its about 1.5. 
The fraction is just another form for  this  3÷1.5 
The answer is 2. 

Hope this was Helpful, sorry it was a little long but you needed an explanation :)



6 0
3 years ago
Question 1 of 10
Radda [10]

Answer:

C is correct

Step-by-step explanation:

{x}^{2}  = 18 \\ x =  \frac{ + }{}  \sqrt{18}  =  \frac{ + }{}  \sqrt{9 \times 2}  =  \\ x =  \frac{ + }{}  \sqrt{9}  \times  \sqrt{2}   \\ x =  \frac{ + }{} 3 \sqrt{2}

8 0
2 years ago
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