Answer:
C
Expand the bracets then simplfy and then factorise
Answer:
7 minutes
Step-by-step explanation:
1000 stairs in 25 minutes
280 stairs in 280*25 / 1000 = 7 minutes
Answer:
x= -3
Step-by-step explanation:
simplify.
1+4=x-8
Move all terms containing x to the left
1+3x=-8
Move all terms NOT containing to the right
3x=-9
Divide each term by 3
x= -3
Answer:
Option A is correct.
The constant of variation is, 
Step-by-step explanation:
The Direct variation says that:
if a vary directly to b then, the equation is of the form: a = kb where k is the constant of variation.
Given: if y varies directly as x.
By definition of direct Variation:
y = kx where is the constant of variation.
It is also given that: y = -3 and x =2
Solve for k;
-3 = 2k
Divide both sides by 2 we have;

Therefore, the constant of variation is, 