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rewona [7]
3 years ago
10

Find the area and the circumference of a circle with diameter 4 ft

Mathematics
1 answer:
GenaCL600 [577]3 years ago
5 0

Answer:

Circumference is 12.56

Area is 6.28

Step-by-step explanation:

4×3.14=12.56

2×3.14=6.28

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Find the point of intersection (if any) of the following pairs of lines: a) x – 2y +1=0 2x + 3y – 7 = 0 b) x-2y+11=0 -x+2y-13 =
pychu [463]

Answer:

a) (11/7, 9/7)

b) There's no point of intersection

Step-by-step explanation:

a) x - 2y + 1 = 0

2x + 3y - 7 = 0

To find the point of intersection, we need to solve the system of equations  and the result will be the point of intersection (x,y)

x-2y+1=0\\x= 2y-1

Now we substitute x in the second equation:

2x+3y-7=0\\2(2y-1)+3y-7=0\\4y-2+3y-7=0\\7y-9=0\\y=9/7

Now we substitute y in our first equation.

x-2y+1=0\\x-2(9/7)+1=0\\x-18/7+1=0\\x=18/7-1\\x=11/7.

The point of intersection is (11/7, 9/7)

b) x -2y +11 =0

-x + 2y - 13 =0

We are going to follow the same procedure:

x-2y+11=0\\x=2y-11

-(2y-11)+2y-13=0\\-2y+11+2y-13=0\\0y=2\\0=2

Since this system of equations doesn't have a solution, the system has no point of intersection.

5 0
3 years ago
In the equation 4+c=18, the value of c will be less than 18 true or false?
Dominik [7]

Answer:

true

Step-by-step explanation:

because when we subtract 18 and 4, the answer is 12. Hence, the value is less than 18

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3 years ago
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brilliants [131]

Answer: the Answer is b

Step-by-step explanation:

8 0
3 years ago
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