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3 years ago

I really need help!

Mathematics

2 answers:

iVinArrow [24]3 years ago

8 0

Answer:

c. m∠P'Q'R' = m∠PQR

Step-by-step explanation:

Rotation is a rigid transformation. It does not change lengths or angles.

alexira [117]3 years ago

8 0

Answer:

Option c is right

Step-by-step explanation:

Rotation means turning around a centre. Here O, the origin is the centre. And angle PQR is rotated 90 degrees counter clockwise about the origin.

Rotation is the change of direction, but normally the sizes and angles will not change.

Here by rotation angle PQR will not change (neither increase or decrease)

Hence Angle PQR = angle P'Q'R' Option c is right

Option a is not right since the new angle need not be 90 degrees unless we know PQR =90

Similarly for b also it is wrong

d is wrong since rotation will not make angle 2 times.

Hence option c is right answer

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Find the solution set. |x| = -4 A. { } B. {-2, 2} C. {-4, 4} D. {-16, 16}

Ray Of Light [21]

Answer:

A. { }

Step-by-step explanation:

Absolute value cannot be less than zero.

-4 < 0

There is no solution for x, ∈, R.

Hope this helps.

6 0

3 years ago

Barney's Book Store currently has 2000 books in stock. There are 3 times as many non-fiction books as fiction books. Determine t

xxMikexx [17]

Answer:

There are 1500 non fiction books and 500 fiction books currently in the store.

Step-by-step explanation:

Given:

Total Number of books = 2000

Let the number of fiction books be 'x'.

Now given:

There are 3 times as many non-fiction books as fiction books.

Number of non fiction books = $3x$

We need to find the number of non-fiction and fiction books.

Solution:

Now we know that;

Total Number of books is equal to sum of the number of non-fiction and fiction books.

framing in equation form we get;

$x+3x=2000\\\\4x=2000$

Dividing both side by 4 we get;

$\frac{4x}{4}=\frac{2000}{4}\\\\x= 500\ books$

Number of fiction books = 500

Number of non fiction books = $3x=3\times 500 =1500$

Hence There are 1500 non fiction books and 500 fiction books currently in the store.

8 0

3 years ago

Determine whether the variation between the indicated quantities is direct or inverse. The number of calories in a cheese pizza

-BARSIC- [3]

Answer:

The variance is direct.

Step-by-step explanation:

Since size of the pizza determines the amount of calories.

Let us say that a 2" x4" strip of pizza has 250 calories.

Then a pizza of twice the size (or 4" x 4") will have twice as many calories (500 calories) .

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2 years ago

You plan to take $450 U.S on a trip to South Africa. How many rands is this if one U.S dollar equals 3.70 rands ?

kakasveta [241]

Multiply 450 and 3.70 to get 1,665 rands

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3 years ago

Read 2 more answers

F(x) = 2-4<br> Find f(2)

Jet001 [13]

Answer:

-8

Step-by-step explanation:

So first off, x is 2-4. So that's the default. It would be -2. If you multiply -2 by 2, it is -4.

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10 months ago