1:equilateral
2:isosceles
3:scalene
4:right
5:acute
6:obtuse
Answer: 
Step-by-step explanation:
x^2+y^2=r^2 --> subtract x^2 to other side
y^2=r^2-x^2 --> square root both sides
y=sqrt(r^2-x^2)
Answer:
40 5x4 20 20x2 40
Step-by-step explanation:
Answer: The first option.
Step-by-step explanation:
1. The formula for calculate the perimeter is:
P=2l+2w
Where l is the lenght and w is the width.
2. The first perimeter is:

3. If you multiply the dimension by a scale of factor of 2, is the same as write the following expression:

Where
is the first perimeter.
4. Then:

Answer: y =
Step-by-step explanation: look for the lcm
a=
cross multiply
ax =9xy + 2
ax - 2 = 9xy
divide both sides by 9x

y=