All categories

2 years ago

Given the diameter of a circle is 17 1/2cm, find its area. (use π=22/7)

Mathematics

1 answer:

Leokris [45]2 years ago

6 0

Step-by-step explanation:

$area \: of \: circle = \pi{r}^{2} \\ = 22 \div 7{ \times (35 \div 2)}^{2} \\ = 3.14 \times 306.25 \\ = 961.625 {cm}^{2}$

<h2>hope it helps.</h2><h2>stay safe healthy and happy...</h2>

You might be interested in

Pls help asap!!!

wlad13 [49]

Answer:

negative 2.5

Step-by-step explanation:

It is belove sea level, so it will be between negative 2 and negative 3 on a vertical number line.

4 0

3 years ago

Write an equation of the line that has a slope of 2 and passes through the point (-5,1)

vlada-n [284]

y = ax+b

*Slope of 2

a = 2

y = 2x + b

Point (-5,1):

1 = 2*-5 + b

1 = -10 + b

b = 11

y = 2x+11

6 0

3 years ago

Given sin t = 1/7, tan t < 0, find cos (t) and tan(t)

kobusy [5.1K]

Sin^2 + cos^2 =1
COS t= .9897
Since tan=sin/cos < 0 so cos = -.9897
Tan = sin/cos = (1/7)/(-.9897)= -.1443

6 0

3 years ago

Solve the system of equation — 3х + бу = 9<br> 5х + 7y = -49

agasfer [191]

Answer:

y = 64/3

x = -119/3

Step-by-step explanation:

3х + 6у = 9 => 5*3x+5*6у = 9*5 => 15x+30у=45 (1)

5х + 7y = -49 => 3*5x + 3*7y = -49*3 => 15x+21y=-147 (2)

(1)-(2) => 9y = 192 => y = 64/3

x = -119/3

3 0

3 years ago

Which are the intercepts of the equation y+2=4(x+1) ?

Irina18 [472]

Answer:

x-intercept is ( $- \frac{1}{2}, 0$ ) and y-intercept is ( $0, 2$ )

Step-by-step explanation:

<h2>How do we find the y-intercept of a function? </h2>

We solve the equation when x=0. Let's try that with $y+2=4(x+1)$

First, let's simplify it so that it resembles $y=mx+b$ more noticeably

$y = 4x + 4 - 2 \\y = 4x + 2$

Now let's plug in 0 for x to find the y-intercept:

$y = 4\cdot 0 + 2\\y = 2$

<h2>How do we find the x-intercept of a function? </h2>

We solve the equation when y=0. Let's try this from the simplified equation we got ( $y = 4x + 2$ )

$0 = 4x + 2\\-2 = 4x\\\frac{-2}{4} = x\\x = - \frac{1}{2}$

We must remind ourselves that all y-intercepts have an x that is equal to 0 and that all x-intercepts have a y equal to 0.

That means that our x-intercept will be ( $- \frac{1}{2}, 0$ ) and our y-intercept will be ( $0, 2$ )

This corresponds to the 3rd option counting from the left.

Good luck!

3 0

3 years ago

Given the diameter of a circle is 17 1/2cm, find its area. (use π=22/7)​

Given the diameter of a circle is 17 1/2cm, find its area. (use π=22/7)