Find the value of x.
It’s a right angle. One of the angles says (3x) degree other side says (4x-1) degree

x=13

Step-by-step explanation:

The sum of the angles of a triangle add to 180 degrees

3x+ 4x-1 +90 =180

Combine like terms

7x +89 = 180

Subtract 89 from each side

7x +89-89=180-89

7x =91

Divide each side by 7

7x/7 =91/7

x = 13

b

step-by-step explanation:

u take $75 minus $60.the anwer/original($75)multiply by 100

area of rectangle a is 2 times that of rectangle b that means 2x+x =   36cm^2

3x = 36cm ^2

x = 36/3

x= 12cm^2

and 2x = 24cm^2

now side of square = are divided by sides = 36/4 = 6cm

that means length of rectangle a and b is 6cm too

now for rectangle a,

l*b = area

= 6*y=24

y=24/6 = 4

therefore dimensions of rectangle a are- length = 6cm, breadth = 4cm

and for rectangle b, length = 6cm and breadth = 6-4 = 2cm.

hope this .