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Mazyrski [523]
3 years ago
7

What is a radius? Is it the point in the middle?How do you calculate the circumference using 3.14 pi?

Mathematics
2 answers:
Elina [12.6K]3 years ago
7 0
Half of the distance from one side, through the middle, to the other side. 
circumference: 3.14*radius*2
solniwko [45]3 years ago
7 0
The radius is the distance from the center point of a circle to the "edge" of the circle. To calculate the circumference you use the formula: C=(D)(pi)...D stands for distance from one end of the circle to the other through the center point - basically the distance is the radius of any circle just doubled.
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4. Simplify the expression:
Natalija [7]

Answer:

<h2>A. 2x² + 5x + 1</h2>

Step-by-step explanation:

7x^2-6+4x+7-5x^2+x\qquad\text{combine like terms}\\\\=(7x^2-5x^2)+(4x+x)+(-6+7)\\\\=2x^2+5x+1

3 0
3 years ago
In a talent show of singing and comedy acts, singing acts are 4.5 minutes long and comedy acts are 3.5 minutes long. The show ha
Alik [6]

Step-by-step explanation:

Let the number of singing act be x

Let the number of comedy act be y

If the total act is 14, then;

x+y = 14..... 1

If singing acts are 4.5 minutes long and comedy acts are 3.5 minutes long and the acts lasts 59 minutes, then:

4.5x + 3.5y = 59 .......... 2

Solve both equation simultaneously for x and y

x+y = 14

45x+35y = 590

.................................

x+y = 14......... *9

9x+7y = 118....... 1

...............................

9x+9y = 126

9x+7y = 118

Subtract both equations

9y-7y = 126-118

2y = 8

y = 8/2

y = 4

Substitute y = 4 into equation 1;

From 1: x+y = 14

x+4 = 14

x = 14-4

x =10

Hence there are 10 singing acts and 4 comedy acts in the show

7 0
3 years ago
6x+18y=18 find y and z
Masja [62]

6x + 18y = 18. Let us take x = 0

6(0) + 18y = 18

0 + 18y = 18

18y = 18

y = 18/18

y = 1

(0, 1) [x = 0, y = 1]

6x + 18y = 18. Let us take y = 0

6x + 18(0) = 18

6x + 0 = 18

6x = 18

x = 18/6

x = 3

(3, 0) [x = 3, y =0]

Infinite solutions can be found for x and y

3 0
3 years ago
Consider the line 9X - 8Y = 6
kenny6666 [7]
Use Desmos.com to help you
8 0
3 years ago
Find the area of the shaded section only in the future below.
maxonik [38]

Answer:

293.5

Step-by-step explanation:

40×50/2

=1000 cm²

π×15²

3.14×225

706.5

1000-706.5=293.5 cm²

4 0
3 years ago
Read 2 more answers
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