First thing First. You must find have a common denominator. If you want to find it then you do this
3: 3 6 9 12 15 18 21
7: 7 14 21 28
Once you found a number they have in common (21) You do this next
3/7 * 3/3 = 9/21
2/3 * 7/7 = 14/21
Now the next thing you do is subtract your numerators but not the denominators
14-9=5
5/12
you cant simplified so your done! Hope this helps!!!! <span />
Answer: the length of the sides are 21m, 16m and 28 feet
Step-by-step explanation:
Let x represent the length of the first side.
Let y represent the length of the second side.
Let z represent the length of the third side.
The perimeter of a triangle is 65 meters. It means that
x + y + z = 65- - - - - - - - - - 1
The second side is 5 meters less than the first side. It means that
y = x - 5
The third side is 7 meters more than the first side. This means that
z = x + 7
Substituting y = x - 5 and z = x + 7 into equation 1, it becomes
x + x - 5 + x + 7 = 65
3x + 2 = 65
3x = 65 - 2 = 63
x = 63/3
x = 21
y = 21 - 5 = 16
z = 21 + 7 = 28
Answer:
Step-by-step explanation:
This is a good one!
So we know that a triangle's angles must add up to 180 degrees. Therefore, we can say that:
(3x - 3) + (5x + 3) + (4x) = 180.
This can be rewritten as 12x = 180.
Divide each side by 12 to get x alone, you get:
x = 15
Time to plug n' chug.
4x = 60, 3x - 3 = 42, 5x + 3 = 78
Boom!