Part A : formula for circumference = pi*D or 2piR
for circle A.... 8*pi=25.12
therefore pi=3.14
for circle B.... 3*pi=9.42
therefore pi=9.42/3
pi=3.14
part B : formula for Area =

for circle A.... 50.24=pi*(8/2)sqr...(because diameter/2= radius)
pi=50.24/16
pi=3.14
for circle B... 7.065=pi*(3/2)sqr...
pi=7.065/2.25
pi=3.14
what do you observe?
the values for pi are all equal... therefore pi is constant.
5 is correct! the real answer is 4.80
Hello! every triangle’s interior angles add up to 180. here would be how I solve this equation.
180-75-40=65 (find missing angle)
65+x=180 (supplementary angles)
180-65=x (substitution)
115=x (simplify)
x=115 (reflexive property of equality)
You already know the slope is 3 and you have the point, so you would plug it into y = mx + b
-2 = y
3 = m
-5 = x
Plug in:
-2 = 3(-5) + b
Solve:
-2 = -15 + b
-2 (+15) = -15 + b (+15)
13 = b
Now you have b, so you can form the equation where the slope is 3x and the y-intercept is 13.
Final answer: y = 3x + 13