It doesn't change because to add fractions, you need a common denominator. To find it, they multiplied 1/3 by 2 to make 2/6, to add to the 3/6.
Let the numbers be 7x and 4x
According to question
7x-4x =57
3x =57
X=57/3
X=19
So the numbers are
7x=7*19=133
4x=4*19=76
Answer:
y + z = x
Step-by-step explanation:
The external angle of a triangle is equal to the sum of the 2 opposite interior angles.
x is an exterior angle of the triangle, thus
y + z = x
3 laps because the track is 1/8 mile because when she ran 8 laps it is 8/8 which = 1 so the answer is 3 laps
Answer: 
Step-by-step explanation:
Simplify:
