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2 years ago

What is the area of the following circle? D = 2

Mathematics

2 answers:

Vladimir79 [104]2 years ago

8 0

Answer:

$\pi \: {r}^{2} = \pi \: { \frac{d}{4} }^{2}$

Plug the formula in to your calculator

lbvjy [14]2 years ago

6 0

The area of the circle would be 3.14

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What equation is perpendicular to y=2x-3 and<br> passes through (-1, 2)?

Wittaler [7]

Answer:

$y=-\frac{1}{2}x+\frac{5}{2}$

Step-by-step explanation:

Equation of the given line: $y=2x-3$

Slope of the line = $2$

Slope of the perpendicular line = $-\frac{1}{2}$

So the equation of the perpendicular line:

$y=-\frac{1}{2}x+c$

This passes through the point (-1,2).Substituting in the equation:

$2=-\frac{1}{2}*(-1)+c$

=> $c=2+\frac{1}{2}$

=> $c=\frac{5}{2}$

So the equation of the line :

$y=-\frac{1}{2}x+\frac{5}{2}$

4 0

2 years ago

Can anyone help me with this?

siniylev [52]

Answer:

1. 280/11

2. 1700/11

3. 280/11

4. 3600

5. 360

Step-by-step explanation:

Let n = sides of a regular polygon

For these problems, n = 22 because there are 22 sides.

I am going to write the formulas needed for each question below.

360/n
180 - 360/n
360/n
180(n-2)
360 (isn't affected by n)

To solve, just plug in N with 22.

These formulas are very easy to prove and I recommend if you have time try to prove these.

5 0

2 years ago

What is the domain and range of d(x)=|x|-4

ser-zykov [4K]

Answer:

Domain = (-∞,∞) { x|x∈R}

Range = { -4 , ∞} , { y|y≥-4}

Step-by-step explanation:

6 0

2 years ago

Find the length of AB.<br> AB = [ ? ]in

Nataly [62]

Answer: About 3.14 inches

8 0

2 years ago

Rectangle EFGH is similar to rectangle JKLM. Which proportion can be used to

Dominik [7]

*See attached picture for the diagrams being referred to

Answer:

C. ⁵/12= ²/x

Step-by-step Explanation:

Given that rectangle EFGH is similar to rectangle JKLM, it means the corresponding sides of both rectangles are similar, and as such the ratios if the corresponding sides of rectangle EFGH and rectangle JKLM would be equal.

Thus, EF/JK = FG/KL

Since, EF = 5; JK = 12; FG = 2; and KL= x, therefore, the proportion to use in finding x would be:

⁵/12= ²/x

6 0

2 years ago