Answer:
a) x = 4 cm
Step-by-step explanation:
x + 2x + 2x = 20 cm
5x = 20
x = 4 cm
Answer:
4
Step-by-step explanation:
Constant of proportionality refers to the slope of the line in this case, the slope of the line is (4-0)/(1-0)=4
Answer:
X<-19
Step-by-step explanation:

Answer:
x= -6
Step-by-step explanation:
2x/3=x+2
multiply each side by 3
2x/3*3=x+2*3
calculate
2x=3x+6
move variable to the left and change the sign
2x-3x=6
collect like terms
-x=6
change the signs
x= -6
Step-by-step explanation:
89 multiplied by negative 34 gives a negative answer, since positive multiplied by negative is negative hence,
(89) × (-34) = -3026