Answer:
y = -2x
Step-by-step explanation:
The line intercepts in point (0,0) so in the equation: y = mx + b, the b will be 0 (or gone).
Basically the equation would be:
y = mx
You only need the m or the slope of the line.
To know this, just count the rise/run from two points.
I chose two points given: (0,0) and (4,2)
From (0,0) to (4,2), you rise up by 4 and go left by 2 (negative 2 because it is going left).
rise/run
4/-2 = -2
m = -2
So the equation would be y = -2x
To find the circumference you would do,
(rx2)x3.14
(rx2)x3.14=21.98
so, 21.98/3.14=7
7/2=3.5
Check
3.5x2=7
7x3.14=21.98
So
3.5 is your answer!!! :)
~Summer
The three main trig functions are sine (written as sin), cosine (written as cos), and tangent (written as tan).
Sine of an angle = the length of the side opposite (aka across) the angle / the length of the hypotenuse
Cosine of an angle = the length of the side adjacent (aka the side next to which isn't the hypotenuse) to the angle / the length of the hypotenuse
Tangent of an angle = the length of the side opposite of the angle / the length of the side adjacent to the angle.
The acronym to remember this is SOHCAHTOA
SOH | CAH | TOA
SOH means sin(x) = opposite/hypotenuse
CAH means cos(x) = adjacent/hypotenuse
TOA means tan(x)= opposite/adjacent
cosB = length of adjacent side/length of hypotenuse = 7/25
tanB = length of opposite/length of adjacent = 24/7
sinB = length of opposite/length of hypotenuse = 24/25
Answer:
Every inch is equal to 9 feet
Step-by-step explanation:
45/5= 9
