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kramer
3 years ago
5

Pls help I’ll give brainiest to whoever helps

Mathematics
1 answer:
Gre4nikov [31]3 years ago
7 0

Answer:

K'(-3,-2) and A'(-2,5)

Step-by-step explanation:

180 degree rotation = (x,y)---(-x, -y)

hence, if k=(3,2)

then k' = (-3, -2)

90 degree rotation clockwise= (x,y)--(y,-x)

hence if, A=(-5 , -2)

then, A'= (-2, 5)

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If a person walks 1/3 of a mile every 1/6 of an hour, what is their speed in miles per hour?
zhannawk [14.2K]

Answer:

2 mi per hour

Step-by-step explanation:

1/3*6=

6/3= 2

2 mi per hour

4 0
2 years ago
Read 2 more answers
When a number is doubled and then added to 24,the result is 49
Trava [24]

Answer:

12.5 has to be the number that was doubled.

Step-by-step explanation:

24+2x=49 is your equation

you subtract 24 from 49 you get 25

25 divided by 2 is 12.5 there for 12.5+12.5 is 25

25+24=49

Hope this helps!

7 0
3 years ago
Bob's tire outlet sold a record of tires last month one sales ma sold 165 tires which was 60 percent of the record what was the
Arisa [49]
The record number was 275 tires.

165/x=60/100

165 times 100=16500
16500/60=275
x=275
3 0
3 years ago
A rectangular garden is 8 metres longer than it is wide. if its area is 240m2 , how many metres is the width (ie. the shortest s
Snezhnost [94]
Area of a rectangle is length by width, width is x, length is x+8
x×(x+8)=240
x²+8x=240
x²+8x-240=0
Use the quadratic formula to solve
x=\frac{-b±\sqrt{b^{2}-4ac}}{2a}
x=\frac{-8±\sqrt{8^{2}-4(1)(-240)}}{2(1)}
x=\frac{-8±\sqrt{64-4(-240)}}{2}x=\frac{-8±\sqrt{1024}}{2}
x=\frac{-8±32}{2}
x=\frac{24}{2} OR \frac{-40}{2}
x=12 OR -20
It is a distance so can't be negative, so the answer must be 12
3 0
3 years ago
Suppose f(x, y) is a differentiable function of x and y and let g(r, s) = f (2rs, 8s − 2r). Use
worty [1.4K]

By the chain rule,

\dfrac{\partial g}{\partial r} = \dfrac{\partial f}{\partial r} \\\\ ~~~~~ = \dfrac{\partial f}{\partial x} \dfrac{\partial x}{\partial r} + \dfrac{\partial f}{\partial y} \dfrac{\partial y}{\partial r} \\\\ ~~~~~ = 2 s \dfrac{\partial f}{\partial x} - 2 \dfrac{\partial f}{\partial y}

where x(r,s)=2rs and y(r,s)=8s-2r.

If r=2 and s=1, then

x = 2\cdot2\cdot1 = 4

y=8\cdot1-2\cdot2 = 4

so that

g_r(2,1) = 2\cdot1 f_x(4,4) - 2 f_y(4,4) = 2\cdot2-2\cdot3 = \boxed{-2}

5 0
1 year ago
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