Answer:
P(- 4, - 8 )
Step-by-step explanation:
The abscissa is the x- coordinate and the ordinate is the y- coordinate.
Here b = 2a , thus
a + 2a = - 12
3a = - 12 ( divide both sides by 3 )
a = - 4
and b = 2a = 2 × - 4 = - 8
P(- 4, - 8 )
I will give you my solution down here
3x-x=2+4
2x=6
x=3
The answer is he would need 8 tables, with 6 people at the last table
Answer:
∠C = 90°
Step-by-step explanation:
The sum of the 3 angles in a triangle = 180°, thus
6x + 2x + 4x = 180, that is
12x = 180 ( divide both sides by 12 )
x = 15
Hence
∠C = 6x = 6 × 15 = 90°
Answer:
48 sq. units
Step-by-step explanation:
The area of a trapezoid is given by half sum of the bases multiplied by the height

where a and b are the two parallel sides of the trapezoid and h is the height or amplitude of the trapezoid
But you are aware that, the median of a trapezoid is equal to half the sum of the bases, thus the first part of the formulae is covered by the median

Hence area, A, of a trapezoid is simplified to product of median and amplitude
