Answer:
Step-by-step explanation:
Circle is centred at (0, -2)
-> h = 0 & k = - 2
radius of the circle (r) = y-coordinate of the center = - 2
Equation of circle in standard form is given as:
Plugging the values of h, k and r in the above equation, we find:
This is the required equation of circle.
Answer:
4) d = 60; e = 90
5) f = 30
6) h = 120
Step-by-step explanation:
4)
d + d + d = 180
3d = 180
d = 60
e + e + e + e = 360
4e = 360
e = 90
5)
70 + (180 - 100) + f = 180
70 + 80 + f = 180
f = 30
6)
45 + 75 + (180 - h) = 180
300 - h = 180
-h = -120
h = 120
Answer:
Step-by-step explanation:
3(x+4)-6=5x+5
distribute 3 through the parenthesis (3 times x + 3 times 4)=3x+12
3x+12-6=5x+5
subtract 12-6
3x+6=5x+5
Move the variable to the left and change the sign
3x-5x+6=5
collect like terms
3x-5x=5-6
-2x=5-6
divide both sides by -2
x=1/2