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3 years ago

What happens in a 90° clockwise/270° counterclockwise. rotation?*

Mathematics

2 answers:

Molodets [167]3 years ago

8 0

Answer:

When rotating a point 90 degrees counterclockwise about the origin our point A(x,y) becomes A'(-y,x). In other words, switch x and y and make y negative.

Alexandra [31]3 years ago

8 0

Answer:

The formula is

P (x,y)---->P' (y, -x)

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I need help with these three problems.... please help me????

viva [34]

12. Answer: 2130

Step-by-step explanation:

T = -0.01y + 10.6

9.2 = -0.01y + 10.6

-10.6 -10.6

-1.4 = -0.01y

÷-0.01 ÷-0.01

140 = y

"y" represents the number of years after 1990

1990 + 140

= 2130

**************************************************************

13. Answer: -0.0036° per foot

Step-by-step explanation:

Since the relationship is linear, then we can set up the values as x, y coordinates and use the slope formula to find the rate of degrees over feet.

(6562, 63) and (16405, 28)

rate = $\frac{28 - 63}{16405-6562}$

= $\frac{-35}{9843}$

= $\frac{-0.0036}{1}$

**************************************************************

14. Answer: $0.28 per kWh

Step-by-step explanation:

Same reason as #13

(200, 55) and (500, 140)

rate = $\frac{140-55}{500-200}$

= $\frac{85}{300}$

= $\frac{0.28}{1}$

5 0

3 years ago

ONE of Michael's birds came out of the cage and flew away.

Julli [10]

Answer:

100.0 bc it is ONE bird or 100%?????

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2 years ago

HELP ME PLEASE I AM BEGGING

Inessa05 [86]

Answer:

Step-by-step explanation:

well it would be a proportion. so 5 cans per 3 days gives you 5/3. then for the next proportion. it would also be cans over days. so c / 7

5/3 = c/7

answer is H

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2 years ago

I need help. once again. bahahaha

katrin [286]

Answer:

letters d. and e.

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3 years ago

Can an angle that has a supplement also h ave a complement; always sometimes or never

Romashka [77]

Sometimes
for example a 30 degree angle has a 60 degree angle as its complement and a 150 degree angle as its supplement.

if you choose a 90 degree angle it can only have a supplement
if you choose a 180 degree angle it can't have either

hope this helps

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3 years ago