Answer:
from my opinion second option is right
Elvira (e) is 5 years older than Morton (m)
e = m + 5
Morton (m) is twice as old as Michelle (c)
m = 2c
The combined total of their ages is 85
e + m + c = 85
We want m at the end so let's write everything in terms of m.
e = m + 5
c = m/2
85 = e + m + c = m+5 + m + m/2 = 5 + (5/2) m
m = (2/5) (85 - 5) = 32
Answer: 32 years old
Check:
That makes Elvira 37 and Michele 16, total 32+37+16=85, good
Answer:
a.) .375 inches per day
b.) no
c.) 48 days
Step-by-step explanation:
If 8 days produces 3 inches of ice, I divided the 3 inches by the 8 days to see how much it grew per day. I got<u> .375 inches per day</u>.
Knowing how much it grew each day, I used .375 inches per day and multiplied it by 21 (3 weeks). So <u>no, it only grew 7.875 inches over the 21 days</u>.
You can double check it by dividing 10 inches / .375 inches per day and saw it would take over 26 days to reach 10 inches.
I took 1.5 feet and converted it to 18 inches. 18 inches divided by .375 inches per day equals <u>48 days.</u>
I hope this helps you! :)
Answer:
Option B
Step-by-step explanation:
we know that
The sum of an arithmetic series is equal to
S=n(a1+an)/2
where
a1 is the first term
an is the last term
n is the number of terms
In this problem we have
n=20
a1=102
an=159
substitute the values in the formula
S=20(102+159)/2
