Answer:
25 Seconds.
Step-by-step explanation:
You need to know how many seconds it takes to read the bottom of the lake.
If, each second, the anchor is falling 0.7 feet, then you need to know how many times it falls 0.7 feet.
This is done by dividing 17.5 by 0.7, which is 25 seconds.
Answer:
10 spiders and 12 ants
Step-by-step explanation:
You need to create two equations
s = # of spiders
a = # of ants
s + a = 22 heads
since each spider and ant has one head
8s + 6a = 152 legs
since every spider has 8 legs and every ant has 6
s + a = 22 can be turned into s = 22 - a
now use substitution
8(22 - a) + 6a = 152
176 - 8a + 6a = 152
176 - 2a = 152
24 = 2a
a = 12
now that you have the number of ants you can solve for the number of spiders
s + a = 22
s + 12 = 22
s = 10
