Me on these !

3) diane and her sister have ages that are two
consecutive odd integers. their product is 63.
write and solve an equation for diane's age if she
is the younger sister.

5) one positive number is 4 more than the other,
and the sum of their squares is 208. find each
number.

Which approach to the theory-and-research cycle does the following sequence reflect: (1) specific observations suggest generalizations, (2) generalizations produce a tentative theory, (3) the theory is tested through the formation of hypotheses, and (4) hypotheses may provide suggestions for additional observations?

Idon't get undoing if its pass adding and subtracting so can someone ? x-2 over 5 = 18

Shirley spelled 12 of her 15 spelling words correctly on the test. what percentage did shirley get on the test?