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3 years ago

What is the area of a circle that has the diameter of 4?

Mathematics

2 answers:

OverLord2011 [107]3 years ago

7 0

The answer to this question is A≈12.57

Vikentia [17]3 years ago

3 0

Answer:

Hello! answer: 12.56

Step-by-step explanation:

Area for circles is found be doing

radius × radius × pi since we arent given radius we have to figure it out. But what we do know it diameter is just 2 times the radius so to undo that to find our radius we just do 4 ÷ 2 and 4 ÷ 2 = 2 so 2 is our radius now we will square it which is just fancy for multiply is by itself so 2 × 2 = 4

4 × 3.14 = 12.56 So 12.56 is our area! Hope this helps you!

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Options: y= -2x - 6 y= 2/3x + 6 y= -2/3x + 6 y=2x + 6

melisa1 [442]

Answer:

y = - $\frac{2}{3}$ x + 6

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Calculate m using the slope formula

m = $\frac{y_{2}-y_{1} }{x_{2}-x_{1} }$

with (x₁, y₁ ) = (0, 6) and (x₂, y₂ ) = (6, 2) ← 2 points on the line

m = $\frac{2-6}{6-0}$ = $\frac{-4}{6}$ = - $\frac{2}{3}$

The line crosses the y- axis at (0, 6) ⇒ c = 6

y = - $\frac{2}{3}$ x + 6 ← equation of line

8 0

2 years ago

15 POINTS!! PLEASE HELP ASAP!!

insens350 [35]

Answer:

Total number of kilometers in the ride = 5 km

Number of kilometers Garret has already biked = k km

Number of kilometers Garret left to ride = 5 - k km

Number of minutes Garret takes per kilometer = 4 minutes.

Step-by-step explanation:

1. It takes 4 minutes for Garret to go a kilometer. Then

Number of minutes Garret takes per kilometer = 4 minutes.

2. Suppose the variable $k$ is the number of kilometers Garret has already biked.

3. Garret is partway through a 20-minute bike ride. It takes 4 minutes for him to go a kilometer. Then

Total number of kilometers in the ride is

$20\div 4=5\ km$

4. Suppose the variable $k$ is the number of kilometers Garret has already biked. Then $5-k$ km is the number of kilometers Garret left to ride.

6 0

3 years ago

Please help me anyone I need help with this question

Leto [7]

Answer:

(d) 2x +y = 8

Step-by-step explanation:

The answer choices are shown in "standard form," so the comparison to the given equation is easier if it is written in standard form. Add 2x to both sides:

2x +y = 5 . . . . . . given equation in standard form

The other equation in a system with no solution will look like this, but will have a different constant:

2x +y = 8 . . . . . . does not intersect the given equation

_____

Additional comment

All of the other equations shown will intersect the given equation. One way to show this is to use the given equation to substitute for y in the answer choices:

a: 2x -(-2x+5) = 8 ⇒ 6x -5 = 8 . . . one solution: x=13/6

b: x +2(-2x+5) = 8 ⇒ -3x +10 = 8 . . . one solution: x=2/3

c: x -2(-2x+5) = 8 ⇒ 5x -10 = 8 . . . one solution: x=18/5

d: 2x +(-2x+5) = 8 ⇒ 5 = 8 . . . no solution

7 0

2 years ago

A betting company wishes to sell 5000 tickets 50 of which will win prizes. I.) A students decided to buy 200 tickets. Let X be t

Alex777 [14]

Answer:45000,000,000,000

Step-by-step explanation:you just have to times it

4 0

3 years ago

Identify an equation in point-slope form for the line perpendicular to y = 1/4 x - 7 that passes through (-2,-6)

Korolek [52]

$\text{Let}\ k:y=m_1x+b_1\ \text{and}\ l:y=m_2x+b_2,\ \text{then}\\\\l\ \perp\ k\iff m_1m_2=-1\to m_2=-\dfrac{1}{m_1}\\\\l\ \parallel\ k\iff m_1=m_2\\\\\text{We have}\ y=\dfrac{1}{4}x-7\to m_1=\dfrac{1}{4}.\\\\\text{therefore}\ m_2=-\dfrac{1}{\frac{1}{4}}=-4.\\\\\text{The point-slope form}:\ y-y_1=m(x-x_1).\\\\\text{Substitute the value of a slope and coordinates of the point (-2, -6)}:\\\\y-(-6)=-4(x-(-2))\\\\Answer:\ \boxed{C.\ y+6=-4(x+2)}$

6 0

3 years ago