A dodecagon has 12 sides. That means that the smallest angle of rotational symmetry is 360/12 or 30°. All of its angles of rotational symmetry will be multiples of 30, including 180°. 135°, since it is not a multiple of 30°, is not a rotational angle for this figure. The order of °rotational symmetry is 12, as there are 12 sides you can turn this figure to (since it is regular).
Answer:
35 red marbles
Step-by-step explanation:
So we can put the different color marbles in a ratio. So 7:2:11. If we add all of those up we get 20. We do 100/20 to get 5. Each number in the ratio is equivalent to 5 marbles. Then we do 7*5 to get 35. We can check our work by doing, (7*5) + (2*5) + (11*5) = 100. And it does equal 100 so the answer is correct.
Brand X cost: $4.50
Brand Y cost: $3.50
Christopher spends total: $49.50
Equation: 4.50x + 3.50y = 49.50
Idk how to solve the equation but this should be the correct equation
Answer:
h = 417.81 meters
The altitude of the plane is 417.81 meters
Step-by-step explanation:
given;
The initial height of the girl h0 = 400 m
Horizontal distance from the airport d = 40 m
Angle of elevation of the plane ∅= 24°
The altitude of the plane when the picture was taken is equal to initial height of the girl plus the elevation height.
h = he + h0
And he (elevation height) can be derived as;
he = dtan∅
he = 40tan24°
Substituting into the equation;
h = 40tan24° + 400
h = 417.81 meters
The altitude of the plane is 417.81 meters
A margin of error means how much a prediction can be wrong. So if a prediction is 54% and the margin of error is 4%, then it can be wrong by 4 percent, so it could be 4 % less (50%) or more (58%).
Correct Answer;
X is the actual answer.
50%≤x≥58%
brainliest pls
