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UNO [17]
3 years ago
10

What does πr² mean and how do I solve it

Mathematics
2 answers:
Licemer1 [7]3 years ago
8 0
That is circle area

A=\pi *  r^{2}

r=circle radius
\pi =3.14
BlackZzzverrR [31]3 years ago
6 0
U do the radios first then what ever your anwser is u multipy it by 3.14
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The ratio of the cost of a shirt to the cost of a jacket is 2:5. If the jacket cost $240 more than the shirt,
IrinaVladis [17]

Given:

The ratio of the cost of a shirt to the cost of a jacket is 2:5.

The jacket cost $240 more than the shirt.

To find:

The cost of the shirt and the cost of the jacket.

Solution:

Let x be the cost of the shirt.

The jacket cost $240 more than the shirt. So, the cost of Jacket is (x+240).

The ratio of the cost of a shirt to the cost of a jacket is 2:5. So,

\dfrac{x}{x+240}=\dfrac{2}{5}

5x=2(x+240)

5x=2x+480

Subtract 2x from both sides.

5x-2x=480

3x=480

Divide both sides by 3.

x=\dfrac{480}{3}

x=160

So, the cost of shirt is $160.

Now, the cost of jacket is:

160+240=400

Therefore, the cost of shirt is $160 and the cost of jacket is $400.

6 0
3 years ago
“The line that passes through point H has the equation y=-2x -3”
Katena32 [7]

Answer:

Step-by-step explanation:

Generally

The equation of a line is given as

y = mx + c

Where

m is the slope

c is the intercept on y axis

Note: if two lines are parallel, their slopes are equal

I.e M1 = M2 =m

If two lines are perpendicular, then, their slopes are given as

M2 = - 1/M1

Given that,

The line that pass through the point H has an equation

y = -2x-3

From equation of a line, we know that, the slope of the line that passes through H is -2

m = -2

We want to find the equation of a line parallel to line that passes through H

If the line we want to find is parallel to the given line, then, their slope are equal,

So, the slope of line that passes through point G is m=-2

So, the equation of the line that passes through point G is

y = mx + c, m=-2

y = -2x + c

So, we need to find c, so, using the point G it passes through,

G = (2,1) I.e x = 2 and y = 1

y = -2x + c.

1 = -2(2) + c

1 = -4 + c

1+4 = c

c = 5

So, the equation of the line that passes through G becomes

y = -2x + 5

3 0
3 years ago
Please help hurry!!!!!!!
Stels [109]

Answer: the answer is 224cm3

6 0
3 years ago
Find the equation of a line, in slope intercept form of a line that passes through the point (9,2) and is perpendicular to the l
son4ous [18]

Answer:

the first one  is correct ive T a k e n this testing.

Step-by-step explanation:

7 0
3 years ago
Is 2y=4x+8 a direct proportion?​
Marat540 [252]
Answer:
Y=4-2x

If need step by step please message me! And yes this is the right answer!
6 0
3 years ago
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