The magnitude of the exponent determines how many times you move the decimal to the left or right. Since the exponent is +4, move the decimal to the right 4 times to get 7090
1 = 1
2=1.125
3=0.375
4= not enough information
5= 0.916
In order for two lines to be perpendicular, their gradients must multiply together to get -1
7*b=-1
7b=-1
Divide both sides by 7
So, the gradient of line b is -1/7
Steps
find the Least Common Multiple of the denominators (which is called the Least Common Denominator).
Change each fraction (using equivalent fractions) to make their denominators the same as the least common denominator.
Then add (or subtract) the fractions, as we wish!
your denominators stay the same so its 20
It is 252. hope I helped!
