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vlada-n [284]
1 year ago
13

A circle has center

Mathematics
1 answer:
Fed [463]1 year ago
5 0
Note that the equation of the circle is

(x-h)² +(y-k)² =r²

where centre is (h,k)

the equation of the circle based on the information given

(x-3)² +(y-4)² =r²
and the point on the circle (3,-2)

substitute into the equation

(3-3)² +(-2-4)² =r²

r=6 or r=-6

since r is radius, we reject r=-6 since radius must be nonnegative.

the radius is 6
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How many times smaller will a number become if is it decreased by 20%?
stealth61 [152]

Answer:

Step-by-step explanation:

I'm unsure why my answer was deleted, randomly deleted a thoroughly explained answer.

20% is 20/100, 1/5, or 0.2

The number will decrease by a factor of 5.

3 0
3 years ago
What is the slope of the line that passes through the points (8,-6) and (11,-12)? write the answer in simplest form.​
Hatshy [7]

Answer:

y = -2x + 10

Step-by-step explanation:

The equation is y = mx + b

1. Find the slope first.

--> (y2 - y1) / (x2 - x1) = slope

--> (-12 - -6) / (11 - 8) = (-6) / (3) = -2

2. Then, find the y-intercept (b) by plugging one of the points

--> y = -2x + b

--> -6 = -2(8) + b

--> -6 = -16 + b

--> b = 10

3. Combine

--> y = -2x + 10

8 0
2 years ago
A car is traveling at a speed of 40 m/s. What is the cars speed in kilometers per hour? How many kilometers will the car travel
kaheart [24]

Answer:

144km/hr

288km distance travelled

Step-by-step explanation:

40m/s

= 0.04km/(1÷60÷60)hr

= 144km/hr

distance = speed × time

d = 144 × 2

= 288km

7 0
3 years ago
Why are units of area inappropriate to measure volume? A) Units of area are too small to measure volumes. B) Units of area are t
lorasvet [3.4K]

Answer:

The correct answer is option C

Step-by-step explanation:

Area is usually the planar lamina of a two dimensional figure and usually expressed in units square meter, square feet, square inches etc.

While Volume is the total space occupied by an object in a 3-D setting and is usually expressed in cubic meter, cubic feet, cubic inches etc.

A 2-D dimension can not represent a 3-D structure and thus units of area inappropriate to measure volume

8 0
3 years ago
What is the surface area of this figure?
vova2212 [387]
Let A be the surface area, l the length, w the width and h the height:

l= 12

w=8

h=8

A=2(wh+lw+lh)

A=2(8*8+12*8+12*8)

A= 512 m²


7 0
3 years ago
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