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3 years ago

Find the factors prime or composite 21

Mathematics

1 answer:

velikii [3]3 years ago

7 0

Answer:

21 is a composite number

Step-by-step explanation:

It is a composite because multiple numbers can go in it like 3 and 7 so it is a composite number

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In a survey of music preferences 81 out of 450 students said that they preferred country music what percent of the students pref

Kazeer [188]

To write 81/450 as a percent have to remember that 1 equal 100% and that what you need to do is just to multiply the number by 100 and add at the end symbol % .

81/450 * 100 = 0.18 * 100 = 18% 
81/450 as a percent equals 18%

6 0

3 years ago

The diameter of the Sun is about 1.4 x 106 km. The diameter of the planet

den301095 [7]

Answer:

1.17*10²

Step-by-step explanation:

Diameter of the sun is about 1.4 × 10⁶ km

1.4*10⁶ km = 1,400,000

Diameter of the planet venus is about 12000 km

12000 km = 1.2 × 10⁴

Ratio of the diameters

Sun : Venus

1.4 × 10⁶ km : 1.2 × 10⁴

1.4 × 10⁶ km / 1.2 × 10⁴

1.4 / 1.2 × 10^6-4

1.166 × 10²

Approximately

1.17 × 10²

7 0

2 years ago

Stella graphs the equation y=1/3x – 2

faltersainse [42]

we have

$y=\frac{1}{3}x-2$

Statements

case A) The graph is a straight line.

The statement is True

Because, this is a linear equation (see the attached figure)

case B) The line passes through the origin.

The statement is False

Because the point $(0,0)$ is not a solution of the equation

Verify

Substitute the value of x and y in the equation

$0=\frac{1}{3}*0-2$

$0=-2$ ------> is not true

the point $(0,0)$ is not a solution

therefore

The line does not pass through the origin

case C) The line passes through the point $(0,-2)$

The statement is True

Because the point $(0,-2)$ is a solution of the equation

Verify

Substitute the value of x and y in the equation

$-2=\frac{1}{3}*0-2$

$-2=-2$ ------> is true

the point $(0,-2)$ is a solution

therefore

The line passes through the point $(0,-2)$

case D) The slope of the line is $3$

The statement is False

Because, the slope of the line is $m=\frac{1}{3}$

case E) The y-intercept of the line is $2$

The statement is False

we know that

The y-intercept is the value of y when the value of x is equal to zero

For $x=0$

find the value of y

$y=\frac{1}{3}*0-2=-2$

the y-intercept is equal to $-2$

5 0

4 years ago

Read 2 more answers

3c+8=14 linear equation solve for variable

slava [35]

Answer:

c=2

Step-by-step explanation:

3c+8=14

subtract 8 from both sides

3c=6

divide both sides by 3

c=2

3 0

3 years ago

A^2+2ab+b^2. solve for a=10 and b=50

qaws [65]

A² + 2ab + b² ; Solve when a=10 & b=50

Simply plug in 10 for a and 50 for b in our given equation :)

(10)² + 2(10)(50) + (50)²

Simplify.

100 + 20(50) + 2500

Simplify.

(100 + 2500) + 1000

Simplify.

2600 + 1000

Simplify.

3600

Hope I helped! :)

3 0

3 years ago