Answer: sin pi/4 sin pi/6 = 1/2(cos pi/12 - cos 5pi/12)
correct on apex
It is not possible to select a single group from the primary school, since being a single group it could not in any way represent the entire primary school.
Choosing a group would provide the average height for that group, not the entire primary.
Assumptions can be made that the course of half of the primary would theoretically give us a more accurate representation, but the objective is to select a number of students from each course and there would be a representative sample of the entire primary.
Answer:
infinite solutions
Step-by-step explanation:
3x−5y=15
6x−10y=30
Multiply the first equation by 2
2(3x-5y) = 2*15
6x -10y =30
The two equations are identical, which means they are the same line
That means they have infinite solutions
Answer:
WU corresponds with CD and the scale factor is 3
Answer:
x = 109
Step-by-step explanation:
The figure has one pair of parallel sides and is a trapezoid.
The lower base angle is supplementary to the upper base angle on the same side, thus
x + x - 38 = 180 , that is
2x - 38 = 180 ( add 38 to both sides )
2x = 218 ( divide both sides by 2 )
x = 109
