Answer:
25
Step-by-step explanation:
in four years, mary's sister will be 27. then, we subtract 4 years and add 2 to get that she will be 25.
Decimal form:<span>0.51428571428
Fraction Form (Simplified): 18/35</span>
We know the formula,
t =n =ar
n−1
Here n=8
Common ratio =−2 and first term =a=−6
t =8
=(−6)×(−2)
8−1
t =8
Use this formula
=(−6)×(−2)
7 t= 8
=768
The student's work is correct.
Let, number of spiders = x
number of insects = y
6x + 8y = 36
remember, legs can't be in fraction or decimal.
So, only (3, 2) fits with that.
So, there are 3 spiders & 2 insects in his collection.
Hope this helps!
