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3 years ago

If diameter of a circle is 28 cm,then the circumference of the circle is equal to

2 answers:

8 0

C = 2 pi r

R is radius and it’s half of diameter
Pi is always a constant = 3.14

Diameter = D = 2r

We substitute the 2r with D

C = D pi = 28*3.14

Circumference = 87.9 cm (don’t forget your units)

ratelena [41]3 years ago

4 0

Answer:87.92

Step-by-step explanation: you multiply the diameter by pie or 3.14 to get the circumference

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A) Work out the size of angle x. b) Give reason for your answer.

enot [183]

x=75°

We know that ∠EFG=∠ABF because they are corresponding angles.

We also know that ∠x+∠ABF=180, because angles along a straight line always equal 180:

x+105=180

x=75°

6 0

3 years ago

What is the difference in Fahrenheit degrees between a temperature of 0C and a temperature of 15C?

slamgirl [31]

Answer:

$27^{\circ}F$

Step-by-step explanation:

Use formula

$F=1.8C+32$

to convert Celsius to Fahrenheit.

When $C_1=0^{\circ}C,$ then

$F_1=1.8\cdot 0+32\\ \\F_1=32^{\circ}F$

When $C_2=15^{\circ}C,$ then

$F_2=1.8\cdot 15+32\\ \\F_2=27+32=59^{\circ}F$

Difference:

$F_2-F_1=59^{\circ}F-32^{\circ}F=27^{\circ}F$

8 0

3 years ago

Find the midpoint of the segment with the following end points (10,5) and (6,9)

Taya2010 [7]

Answer:

The mid-point between the endpoints (10,5) and (6,9) is:

$\left(x,\:y\right)=\left(8,\:7\right)$

Step-by-step explanation:

Let (x, y) be the mid-point

Given the points

(10,5)

(6,9)

Using the formula to find the mid-point between the endpoints (10,5) and (6,9)

$\left(x,\:y\right)=\left(\frac{x_2+x_1}{2},\:\:\frac{y_2+y_1}{2}\right)$

Here:

$\left(x_1,\:y_1\right)=\left(10,\:5\right),\:\left(x_2,\:y_2\right)=\left(6,\:9\right)$

Thus,

$\left(x,\:y\right)=\left(\frac{x_2+x_1}{2},\:\:\frac{y_2+y_1}{2}\right)$

$\left(x,\:y\right)=\left(\frac{6+10}{2},\:\frac{9+5}{2}\right)$

$\left(x,\:y\right)=\left(8,\:7\right)$

Therefore, the mid-point between the endpoints (10,5) and (6,9) is:

$\left(x,\:y\right)=\left(8,\:7\right)$

3 0

3 years ago

Negative 5X +3 equals 18

andrey2020 [161]

-5x +3 =18
Subtract 3 from each side
-5x= 15
Divide by -5
x= -3

6 0

4 years ago

Question 1 (1 point)

Vladimir [108]

The ordered pair (1,5) would be the correct answer.

4 0

3 years ago

If diameter of a circle is 28 cm,then the circumference of the circle is equal to​

If diameter of a circle is 28 cm,then the circumference of the circle is equal to