maths class 8 so easy​

Answer:

A = 71.3 square inches

Step-by-step explanation:

31/4 · 46/5 = 713/10 or 71.3

as decimals you can multiply 7.75 x 9.2, which is 71.3

Answer:

Step-by-step explanation:

volume = πr²h = π·3²h = 63π

h = 7 cm

The height of the given cylinder is 7 cm. Therefore, option D is the correct answer.

Volume is the measure of the capacity that an object holds.

Formula to find the volume of the object is Volume = Area of a base × Height.

Given that, the volume of a cylinder is 63π cm³ and the radius is 3 cm.

We know that, the formula to find the volume of a cylinder is πr²h.

Now, πr²h=63π

π×3²×h=63π

h= 7 cm

Therefore, option D is the correct answer.

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Answer:

both the first one

Step-by-step explanation:

use unit rate

Answer: 60 yards

Step-by-step explanation: Starting height is 280 yards, add 140 yards, then subtract 360.

Answer:

p=5

Step-by-step explanation:

Step-by-step explanation:

p = 4d - 3

p = 4 × 2 - 3

p = 8 - 3

Answer:

the answer is 15x+3=3(5x+1)

Answer:

16

Step-by-step explanation:

5+5+3+3=16

hope this help

Answer:

b. -2 and 2

I'm not sure about answer...

Answer:

2 and -2

Step-by-step explanation:

pretty much its asking when y = 4 what does x equal and if you look at the graph when y = 4 x = 2 and -2

Answer:

[tex]x = 34.8^\circ[/tex]

Step-by-step explanation:

Given

See attachment for triangle

Required

Find x

To do this, we simply apply sin formula which is:

[tex]sin(\theta) = \frac{Opposite}{Hypotenuse}[/tex]

In this case, it is:

[tex]sin(x) = \frac{8}{14}[/tex]

[tex]sin(x) =0.5714[/tex]

Take arcsin of both sides

[tex]x = sin^{-1}(0.5714)[/tex]

[tex]x = 34.84791[/tex]

[tex]x = 34.8^\circ[/tex] --- approximated

Answer:

f(5) = 17

Step-by-step explanation:

f(x) = 3x + 2

Since the value of x is 5, we can plug it into the equation.

f(5) = 3(5) + 2

f(5) = 15 + 2

Hope this helped :)

Answer:

Opportunity sampling is also known as convenience and it can be defined as a sampling technique which typically involves the process of selecting participants from a population of interest (target group) to take part in a research study.

Step-by-step explanation:

In Statistics, sampling can be defined as a process used to collect or select data (objects, observations, or individuals) from a larger statistical population using specific procedures.

There are various types of sampling used by researchers and these are;

1. Random sampling.

2. Systematic sampling.

3. Stratified sampling.

4. Cluster sampling.

5. Opportunity or convenience sampling.

Opportunity sampling is also known as convenience and it can be defined as a sampling technique which typically involves the process of selecting participants from a population of interest (target group) to take part in a research study.

This ultimately implies that, an opportunity sampling is a non-probability sampling in which a researcher select participants based on their availability for the study.

For example, John a psychologist standing on the street requesting that passersby join in his research study.

Answer: For the first it would be 6, 3, and 7, 6 is double 3, and 7 is 1 more than 6, 6+3=9, and 9+7=16.

The second one is there were only 6 days that students were absent as 12 divided by 2 is 6.

Answer:

the answer is below :)

Step-by-step explanation:

BigBytes will be 100 +10x = y ($100 flat fee plus 10 times the number of gigabytes equals total cost).

GoGig will be 120 + 5x = y.  ($120 flat fee plus 5 times the number of gigabytes equals total cost).

Now set them equal to each other and solve for x to find where the gigabytes are the same.

100 + 10x = 120 + 5x

Subtract 100 from both sides:  10x = 20 + 5x

Subtract 5x from both sides:  5x = 20.

Divide both sides by 5:  x = 4.  4 gigabytes is the answer.

a brainliest would be appreciated :)

The total amount you will pay for phone service is 4 gigabytes.

An equation is an expression that shows the relationship between two or more numbers and variables.

BigBytes will be 100 +10x = y

Therefore , We have $100 flat fee plus 10 times the number of gigabytes equals total cost).

GoGig will be 120 + 5x = y.  

We have $120 flat fee plus 5 times the number of gigabytes equals total cost).

Now set them equal to each other and solve for x;

100 + 10x = 120 + 5x

Now Subtract 100 from both sides:  

10x = 20 + 5x

Then Subtract 5x from both sides:

5x = 20.

Now Divide both sides by 5:  

x = 4.  

Hence, the total amount you will pay for phone service is 4 gigabytes.

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Answer:

p = 18 ft

Step-by-step explanation:

A = 21p

378 = 21p

p = 378/21

p = 18

Answer:

YEAAAAAAAAAAAAAAAAAAAA

Step-by-step explanation:

Answer:

yeeeeeeeeeeeeeeeeee

Step-by-step explanation:

Answer:

[tex]\boxed{\textsf{ Sides are \textbf{ 6cm , 8cm and 10cm }.}}[/tex]

Step-by-step explanation:

Some sides are given to us and we need to show the converse of Pythagoras Theorem . So the statement of Converse of Pythagoras Theorem is ,

Converse of Pythagoras Theorem :-

If in a triangle the sum of squares of two sides is equal to the square of third side then the angle opposite to the longest side is 90° .

For complete solution kindly refer to the attachment.

Answer:

sorry I don't know the answer

Answer:

Not enough informations

Answer:

no its -4

Step-by-step explanation:

Answer:

The gradient of the line segment between the points (1,-1) and (3,-13) is -6

Step-by-step explanation:

The gradient of the line segment between the points (1,-1) and (3,-13) is -6

Step-by-step explanation:

We need to find the gradient of the line segment between the points (1,-1) and (3,-13)

The gradient is basically the slope of line.

The formula used to calculate slope\gradient is: Slope=\frac{y_2-y_1}{x_2-x_1}\\

We have x_1=1, y_1=-1, x_2=3, y_2=-13

Putting values and finding slope

Slope=\frac{y_2-y_1}{x_2-x_1}\\\\Slope=\frac{-13-(-1)}{3-1} \\Slope=\frac{-13+1}{2} \\Slope=\frac{-12}{2}\\Slope=-6

So, gradient of the line segment between the points (1,-1) and (3,-13) is -6

Answer:

D. x=1

Step-by-step explanation:

Solve  :    x-1 = 0

Add  1  to both sides of the equation :

                     x = 1

x = 1 for equation 5x - ( 4x - 1) = 2.

An equation is a mathematical statement that shows that two mathematical expressions are equal. It may have one variable, two, three and so on.

For given equation,

5x - ( 4x - 1) = 2

This is a equation in one variable which can be solved by transposing the terms.

Firstly, Solving the parenthesis,

5x-4x+1=2

Then, Solving the like terms.

x+1=2

To calculate the value of x, subtract 1 from both the sides.

x+1-1=2-1

x=1

Thus, the value of x is 1. So, option d) is correct.

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Answer:

Slope(m) intercept formulae is

M = (y2-y1) /(x2-x1)

So it's (- 9/7)

Sry it took a bit time to answer coz I wasn't getting my pencil....

Answer:

if 100 came by in 2 hours 50 would come by in one hour

Step-by-step explanation:

split it it's by 2

If 100 came by in 2 hours then 50 would come by in one hour.

There is an independent quantity, and a quantity that depends on it (dependent quantity). When independent quantity moves by a unit measurement (single unit increment), the increment in dependent quantity is called the rate of increment of dependent quantity per unit increment in independent quantity.

We have been given 100 cars pass by in 2 hours​

We need to find the unit rate.

Total car = 100

Time = 2 hours

Unit rate = 100/2

Unit rate = 50

Therefore, the unit rate of 50 car in one hour.

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Answer:

The answer is $10

Step-by-step explanation:

c+5 multiplied by 2 is 2c+10=30 subtract ten to get 2c=20 divide by 2 and get your answer c=10

Answer:

g=16(24)

Sorry if I got it wrong!!

Step-by-step explanation:

Answer:

The answer are

A)

[tex]4 \times 4 - 3b = 22 \\ - 3b = 6 \\ b = - 2[/tex]

B)

[tex]4a = 22 + 3 \times 6 \\ a = 10[/tex]

C)

[tex]4 \times 0 - 3b = 22 \\ b = \frac{ - 22}{3} [/tex]

D)

[tex]4a - 3 \times 0 = 22 \\ a = \frac{22}{4} [/tex]

E)

[tex]a = 22[/tex]