Answer:
It will take 8 hours for Frank and Mary to get to the beach
Step-by-step explanation:
Step 1: Give expression for calculating
d=s×t
where;
d=distance traveled i miles
s=speed in miles per hour
t=time in hours
in our case;
d=520 miles
s=65 miles per hour
t=unknown
Step 2: Solve for the unknown, t
In order to solve for t, the expressions can be rearranged as follows ;
t=d/s
replacing values for d and s;
t=520/65
t=8 hours
It will take 8 hours for Frank and Mary to get to the beach
39 x 5 = (30 x 5) + (9 x 5) = 150 + 45 = 195
He did not change the sign of operation when 28 crossed the equals sign.
Answer:
216
Step-by-step explanation:
put -3 where x is
3 ( 5 -3^2 - 9(-3) )
3 ( 45 + 27 )
3 (72)
216
