Iwill give brsinliest

which equations show the fact family for 4, 7, and 28? select all that apply.

a.

4

×

7

=

28

4

×

7

=

28

b.

7

+

4

=

11

7

+

4

=

11

c.

28

÷

4

=

7

28

÷

4

=

7

d.

28

−

7

=

19

28

-

7

=

19

e.

11

−

7

=

4

this is for my little brother and i really do not understand this at all either

Jackson earns $25 per hour as a tutor at the college library. he set a weekly spending budget of $130 each week and puts the remaining money in his savings account. how many hours must he work this week to have at least an extra $50 to put in his savings account

Solve the proportion of 16/50=x/156.25

Given: df and de are midsegments of abc prove: de=1/2 ac