Answer: The perimeter is 20 cm
Step-by-step explanation: The top and bottom are same length, so 6+6, and the sides are the same length, so 4+4 don’t forget it’s cm and it becomes 20 cm.
PERIMITER = ADDING ALL SIDES
AREA = MULTIPLYING
One way is to factor it
trial and error, with experience
(3x+5)(x-2)
answer is C
X=2 because 5^3=125 and there you are
Answer:
A. y = cos x
Step-by-step explanation:
The function that we see graphed has the point (0,1), this means whichever trig function f(x) it represents f(0) = 1.
Now, only the cosine function has the property that cos(0) = 1, thus choice A is the correct answer.
Answer:
Both of those are functions.
Step-by-step explanation:
is a parabola that opens up.
Any upward or downward parabola is a function because they pass the vertical line test.
![x=\pm \sqrt{1-y}{/tex]Square both sides:[tex]x^2=1-y](https://tex.z-dn.net/?f=x%3D%5Cpm%20%5Csqrt%7B1-y%7D%7B%2Ftex%5D%3C%2Fp%3E%3Cp%3ESquare%20both%20sides%3A%3C%2Fp%3E%3Cp%3E%5Btex%5Dx%5E2%3D1-y)
Subtract 1 on both sides:
Multiply both sides by -1:
So this is a another parabola and it is faced down. So this is also a function.
wit 
willl always be a parabola.
If 
then it is open up.
If 
then it is open down.
Upwards and downward parabolas will always be functions.
are also parabolas but these open to the left or right. These will not be functions because they will not pass the vertical line test.
