P=32cm
A= 64cm^2
Step by Step
Formula(Perimeter): P=s+s+s+s
S=side P=perimeter
P=8*4
P=32
Formula(Area for Square): A=s^2
A=Area s=side
A=8^2
A=84
Answer:
If multiples are allowed (like "10 plain, two chocolate"), then for each of 12 donuts there are 21 possibilities.
That is 21 x 21 x 21 .... x 21 (12 terms in all) = 21^12
Step-by-step explanation:
Answer:
c 15
Step-by-step explanation:
Tangent AB is tangent to circle D at point A. The angle made by a tangent to a circle and a radius of the circle at the point of tangency is a right angle. That means that angle is a right angle, and triangle ABD is a right triangle.
We can use the Pythagoren theorem.
a^2 + b^2 = c^2
x^2 + 20^2 = (x + 10)^2
x^2 + 400 = (x + 10)(x + 10)
x^2 + 400 = x^2 + 10x + 10x + 100
400 = 20x + 100
20x = 300
x = 15
9+(-9)=0 you are showing the opposite sign of the number that added together would give you the sum of zero.
I'm guessing you meant the sum of a number AND 6? If so:
x+6=y or just x+6
x is a variable for "a number" and you add 6 to it. The y on the other side of the equals sign is because the sum (number you get when adding) is unknown due to the value of the x variable being unknown.
