ABC and ACD are triangles. k is a constant,
(1)
a) Work out CD
8a+45
А
8a - 76
ka
3b
b) BCD is a straight line.
Work out the value of k.
You must show your working. (3)
ka+8a+7b
B
D
С
Total marks: 4

(x, y)→(x − 8, y − 7)

step-by-step explanation:

enjoy!

this is answer of 144 cubic meters

b

step-by-step explanation:

the equation of a line in point- slope form is

y - b = m(x - a)

where m is the slope and (a, b) a point on the line

calculate m using the slope formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

with (x₁, y₁ ) = (0, 4) and (x₂, y₂ ) = (3, - 5) ← 2 points on the line

m = = = - 3

with m = - 3 and (a, b) = (3, - 5), then

y - (- 5) = - 3(x - 3), that is

y + 5 = - 3(x - 3) → b

2: 10

step-by-step explanation: