Answer: 15
Step-by-step explanation:
x:9 = 25:15
x = 25:15*9 = 15
9514 1404 393
Answer:
(a) x^2/16 +y^2/9 = 1
Step-by-step explanation:
The form for the equation of an ellipse centered at the origin is ...
(x/(semi-x-axis))^2 +(y/(semi-y-axis))^2 = 1
The vertex values tell you the semi-x-axis is 4 units, and the semi-y-axis is 3 units. Then you have ...
(x/4)^2 +(y/3)^2 = 1
x^2/16 +y^2/9 = 1
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In case you don't remember that form, you can try any of the points in the equations. The equation that works will quickly become apparent.
Answer:
A. 131deg
B. 49deg
C. 131deg
Step-by-step explanation:
180-49=131deg
Opposite congruent angles are equal
Answer:
I am not sure but I think that it is (7x − 5)(x + 1)
I will assume that 0 =72 refers to that the angle of the sectoris 72°.
If so, this sector represents 72°/360° = 1/5 of the total circle.
Then the area of the total circles is 5 * 45yd^2 = 225 yd^2
The radius is obtained from:
Area = π(r^2) = 225 yd^2
r^2 = 225 yd^2 / π = 71.62 yd^2
r = √(71.62yd^2) = 8.5 yd
Answer: 8.5 yd
