Lets x = Mary's age
Emily is there years older than twice her sister Mary's age = 2x + 3
Sum of both is less than 30:
x + 2x + 3 < 30
Solve for x
3x + 3 < 30
3x < 27
x < 9
Mary's age = 9
Inequality represents Mary's possible age:
0 < x < 9
Answer is the second one
0 < x < 9
The correct answer is B) 117
Answer:
The answer is 70 * 8 = 560 springs in 8 hours.
Step-by-step explanation:
First you have to find the 20th term of the sequence
1.5+(19)(-0.05)=0.55
Then apply the sum formula 20/2*(1.5+0.55)=20.5
The answer is 20.5
Then use the sum formula 2
I'm thinking after looking at it for awhile the the answer is (c)
