Answer:
y = 60
Step-by-step explanation:
Given that y varies directly with x then the equation relating them is
y = kx ← k is the constant of variation
To find k use the condition y = 20 when x = 10, then
20 = 10k ( divide both sides by 10 )
2 = k
y = 2x ← equation of variation
When x = 30, then
y = 2 × 30 = 60
Answer:
A = Right trangle and b= obtuse triagle
Step-by-step explanation:
You can tell because they are that way they are
Answer:
B
Step-by-step explanation:
The standard form of the equation of a circle is
(x - h)² + (y - k)² = r²
where (h, k) are the coordinates of the centre and r is the radius
Here (h, k) = (2, - 9) and r = 3, thus
(x - 2)² + (y - (- 9))² = 3², that is
(x - 2)² + (y + 9)² = 9 → B
