Which of the following expressions are equivalent to -4/8 - 8/9 + 4/7 +9/8

Choose 2 answers:
a) -4/7-(8/9+4/7)+9/8
b) -(4/7-8/9+4/7)+9/8
c) -8/9+9/8
d) -(4/7+8/9)+4/7+9/8
e)0

**this is from
khan academy**

What adds to be the bottom number but also multiplies to be the top number with 8 on the bottom and 15 on top

When you dilate a figure with a scale factor of 1/2, what will the dilated figure look like?                                                                                           a: the dilated figure will have side lengths that are half the length of the original side lengths.                                                                          b: the angles in the dilated figure will be half the measure of the original figure.                                                                                c: the dilated figure will have side lengths twice the length of the original.

Eric and shiloh each have a savings account. the ratio of eric’s account balance to shiloh’s account balance is 4: 3. together they have a total of $140 in their accounts. use the tape diagram below to you determine the balance of eric’s account.