Answer:
27
Step-by-step explanation:
-21/-7 =3 so x is 3y. if you plug 9 in for y you get 3(9) then you multiply and get 27.
Answer:
C, 130
Step-by-step explanation:
Area is just length x width, it would just be 13*10
Answer:
40 cm ; 30cm ; 20cm
Step-by-step explanation:
Given that:
Sides of a triangle are in the ratio 2:3:4
Let :
length of the sides = 2x, 3x, 4x
longest side = 4x
Mid side = 3x
Shortest side = 2x
Length of longest side is 20 cm longer than shortest side
4x = 2x + 20 - - (1)
4x - 2x = 20
2x = 20
x = 10
Hence,
longest side = 4x = 4*10 = 40 cm
Mid side = 3x = 3 * 10 = 30 cm
Shortest side = 2x = 2 * 10 = 20 cm
2 , -5 , 1
those are the coefficients (C)
