6x+4/5=8
subtract 6x from both sides
4/5=8-6x
multiply both sides by 5 to get rid of the fraction
4=40-30x
divide both sides by 2
2=20-15x
add 15x to both sides
15x+2=20
subtract 2 from both sides
15x=18
divide both sides by 15
x=1.2
They are all being multiplied by 4
Yes you did get your answer right
Step-by-step explanation:
Since ABC is a triangle,
Angle A + Angle B + Angle C = 180 (Sum of angles in a triangle)
given Angle A = 3x + 1
Angle B = 4x - 17
Angle C = 5x - 20
Now substitute x into all 3 angles.
A = 3(18) + 1 = 54 + 1 = 55 degrees
B = 4(18) - 17 = 72 - 17 = 55 degrees
C = 5(18) - 20 = 90 - 20 = 70 degrees
Since Angle A = Angle B but not equal to Angle C,
Triangle ABC is a isosceles triangle as 2 angles must be the same for it to be a isosceles triangle.
Let, length of the rectangle = (k) m
∴ Width becomes = (k - 11) m
We know, perimeter of a rectangle = 2(l + b)
∴ 2(l + b) = 54
⇒ (k) + (k - 11) = 27
⇒ 2k = 27 + 11 = 38
⇒ k = 19
∴ Dimensions = (k)(k - 11) = 19 m × 8 {answer}.