Our trick here is to think that a fraction in %
land is the same as the correspondent in "number" land; so we can write:
100%
90%
= 120x
Where X is the correspondent of 90% in numbers.
Rearranging: x = 120⋅
90% 100% =108
Answer:
37.7
Step-by-step explanation:
Hypotenuse is the longest side
Answer:
Step-by-step explanation:
If the smallest number is 'x', then the other number = x +1
x*(x+1)= 420
Use distributive property
x*x + x*1 = 420
x² + x - 420 =0 ------> this is the required quadratic equation.
Answer:
the answer is 22 at 3 and at 5 then 3 fourth
Answer:
Step-by-step explanation:
a) Perimeter of triangle = x - 3 + 4x + 3 + 3x - 5
= 8x - 5
Perimeter of rectangle = 2 * (2x + 2) + 2* (4x - 1/2 )
= 4x + 4 + 8x - 1
= 12x + 3
b) 8x - 5 : 12x + 3 = 5 :9
9* ( 8x - 5) = 5 * ( 12x + 3)
72x - 45 = 60x + 15
72x - 60x = 15 + 45
12x = 60
x = 60/12
x = 5
c) 2x + 2 = 2*5 + 2 = 10 +2 =12
4x - 1/2 = 4*5 - 1/2 = 20 - 1/2 = (40- 1)/2 = 39/2
Area of rectangle = length * width = 12 * 39/2 = 6 * 39
= 234 Sq.cm
