Answer:
see explanation
Step-by-step explanation:
Given A is directly proportional to r² then the equation relating them is
A = kr² ← k is the constant of proportion
To find k use the condition when r = 5, A = 75 , then
75 = k × 5² = 25k ( divide both sides by 25 )
3 = k
A = 3r² ← equation of proportion
(a)
when r = 4, then
A = 3 × 4² = 3 × 16 = 48
(b)
when A = 147 , then
147 = 3r² ( divide both sides by 3 )
49 = r² ( take the square root of both sides )
r = = 7
Answer:
Step-by-step explanation:
Answer:
Step-by-step explanation:
1) So -8+2v<2, 2v<10, v<5. That means that at "5" on the axis, you'll draw a circle that's <em>not</em> filled in (because it's <5, not 5) and then draw a box-y thing to the left. Sorry, can't really describe it, but if you look at the picture attached, you'll understand
2) -12m-8-5m-7m, so -12m-8-12m, -80. This one doesn't have a variable... so you can't really graph it?
Answer:
2.50 c+7.50 d=182.50
2.5 c+7.5 d= 182.5
c+3 d=73
c+d=37
subtract
2d=36
d=18
c=37-18=19
number of cats=19
Step-by-step explanation:
A
y = m x + b
y = -1 x + -6
y = -x - 6