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mihalych1998 [28]
2 years ago
14

The diameter of the circle below is 42 cm. Work out the radius of the circle.​

Mathematics
1 answer:
creativ13 [48]2 years ago
8 0

Answer:

r = 21 cm

Step-by-step explanation:

The radius of a circle is 1/2 of the diameter

r = 1/2d

r = 1/2(42)

r = 21 cm

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F(x) = x2 + 5<br> When the domain is ={-2.-1,1} what is the range
Citrus2011 [14]

Answer:

Range = {6, 9}.

Step-by-step explanation:

Just plug in the 3 numbers:

Range = (-2)^2+5 , (-1)^2 + 5 and 1^1 + 5

= 9, 6 and 6.

7 0
3 years ago
If the measure of ÐDCB = 100°, and ÐDAC = 20°, what is ÐCAB?
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8 0
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What is the slope of the line below?<br> (4,5)<br> (-2,2)
Irina18 [472]

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Step-by-step explanation:

8 0
3 years ago
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Write an equation that represents the line
andriy [413]
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3 0
3 years ago
In a classroom of 33 students, the ratio of boys to girls is 3:8. How many boys are in the class?
Hunter-Best [27]
X=number of boys
y=number of girls.

We can suggest the following system of equations:
x+y=33
x/y=3/8

We solve this system of equations by substitution method.
x/y=3/8       ⇒x=3y/8

(3y/8)+y=33
least common multiple=8
3y+8y=33*8
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y=3*8
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x+y=33
x+24=33
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There are 9 boys and 24 girls in the class. 

Answer: C: 9. since 3/11 of the students are boys. 

3 0
4 years ago
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