Answer:
s=6 years
m=48 years
Step-by-step explanation:
Let
Mother's age=m
Son's age=s
m=8*s
m=8s (1)
m+6=9/2(s+6)
m+6=9/2s+27 (2)
Substitute (1) into (2)
m+6=9/2(s)+27
8s+6=9/2s+27
8s+6-9/2s-27=0
8s-9/2s-21=0
(16-9/2)s-21=0
7/2s=21
s=21÷7/2
=21×2/7
=42/7
s=6
Present age of the son=6
m=8s
=8(6)
m=48
Present age of the mother=48
You would circle the 3 in 31, the 9 in 94, and the 1 in 17
Answer: Slope=-2/3
Step-by-step explanation:
Answer:
(a)6.82mph
(b)22 ft/sec
Step-by-step explanation:
Eric's Speed = 10 ft/sec
The Ferry's Speed = 15 miles per hour
<u>Conversion Unit</u>
- 1 mile = 5280 feet
- 1 hour = 3600 seconds
<u>Guide</u>
- When converting from a smaller unit to a larger unit we divide
- When converting from a larger unit to a smaller unit we multiply
(a)To convert Eric's Speed 10 ft/sec to miles per hour

(b)To convert the Ferry's Speed 15 mph to ft/sec
