You can break this down pretty easily (though I know it sounds confusing). First, you seperate all of the digits:
7,725 -> 5, 20, 700, and 7,000
Now, which ones have a difference of a factor of 10? Well, 700 * 10 = 7,000, so the answer would be: The hundredths place. Hope I helped!
the next step would be add x to both sides to get x isolated
Try to convert them into equivalent fractions. The comon multiple is 80 so convert them.
3/8 = 30/80
4/10 = 32/80
4/10 is greater
The top question is B. 30, because you have to set 7y-30 equal to 4y+60 since both lengths are the same.
A) angle A = 180-135= 45 degrees
Angles A and 135 are supplementary angles
b) angle B= 135 degrees
because the two 135 angles are vertical angles ( opposite angles made by two intersecting line)
c) angle C = 45 degrees
because angles C and angles A are corresponding angles since line (1) and line (2) are parallel