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Phantasy [73]
1 year ago
9

What are the coordinates of (-4,-2) rotating 90° counterclockwise?

Mathematics
1 answer:
RUDIKE [14]1 year ago
4 0

Answer:

(2, -4)

Step-by-step explanation:

The rotation of an object <u>turns</u> the object around a <u>fixed point</u> called the center of rotation.  

A <u>rotation</u> of 90° counterclockwise means:

A 90° rotation counterclockwise with the origin (0, 0) as the center of rotation.

The rule for a counterclockwise rotation of 90° about the origin is:

(x, y) → (-y, x)

Therefore:

(-4, -2) → (2, -4)

Learn more about transformations here:

brainly.com/question/27013652

brainly.com/question/28225350

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A phone company charges $0.06 per minute for local calls and $0.15 per minute for international calls. When your bill comes, it
solmaris [256]
Let's assume two variables x and y which represent the local and international calls respectively. 

x + y = 852 = total number of minutes which were consumed by the company (equation 1)
0.06*x+ 0.15 y =69.84 = total price which was charged for the phone calls (Equation 2)
 from equation 1:-
x=852 -y (sub in equation 2)
0.06 (852 - y) + 0.15 y =69.84

51.12 -0.06 y +0.15 y =69.84 (subtracting both sides by 51.12)
0.09 y =18.74
y= 208 minutes = international minutes (sub in 1) 
208+x=852 (By subtracting both sides by 208)
x = 852-208 = 644 minutes = local minutes
6 0
3 years ago
The cost for a company to produce a part for d days is represented by the function f(d)=325d + 8,795. What does the value 8,795
Anna007 [38]

Answer:

C

Step-by-step explanation:

A, B are wrong since 8,795 is a constant, it doesn’t change;

D is wrong since it is the starting cost, not total cost

4 0
3 years ago
the ratio of pens to pencils om carlo's case is case is 4:5. he has 16 pens. how many pencils does carlos have
chubhunter [2.5K]

Answer:

20 pencils

Step-by-step explanation:

4 pens (4) = 16 pens

5 pencils (4) = 20 pencils

This works because 4/5 and 16/20 are the same ratio, 16/20 isn't simplified..

4 0
3 years ago
A new sidewalk will be 6 feet wide, 260 feet long, and filled to a depth of inches (0.75 foot) with concrete. How many cubic yar
tankabanditka [31]
The answer is in the picture
4 0
2 years ago
HELP ME ASAP! Will give BRAINLIEST! Please read the question THEN answer correctly! No guessing. Check ALL that apply
Lostsunrise [7]

Answer:

  A, B

Step-by-step explanation:

After being simplified and put in standard form, the equations are ...

  A. 3x² +8x -13 = 0 . . . a quadratic

  B. 3x² -x -30 = 0 . . . . a quadratic

  C. 4x = -16 . . . . . . . . . a linear equation, not quadratic

  D. 3x⁴ -5x -6 = 0 . . . . a quartic equation, not quadratic

Both of the quadratic equations can be solved using the quadratic formula.

3 0
3 years ago
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