Answer:
-20
Step-by-step explanation:
Use the distributive property to get
(you multiply both xy and -7 by 2.) Now plug in the x and y values to get:
. This gets you
which is
.
Check the picture below.
make sure your calculator is in Degree mode.
Answer:
90
Step-by-step explanation:
90÷2= 45
90÷3=30
Time taken by Ria to paint a room = 4 hours
Time taken by Destiny to paint a room = 6 hours
If they work together, they complete 1 job. So,

The LCD of 4 and 6 is 12




Hence, both of them can paint the room in
hours or 2.4 hours.
Answer:
and?
Step-by-step explanation: