Yard = y
15y <span>≥ 200
y </span><span>≥ 200/13
y </span><span>≥ (about) 13
He must mow about 13 yards
You use </span>≥ , because Billy needs AT LEAST $200, and so <span>≥ is greater or equal to, meaning equal to $200 or more is what Billy wants </span>
Answer: y=6x-20 estimate: 250
Step-by-step explanation:
Hello!
You solve this algebraically.
6(t - 2) = 2(9 - 2t)
Distribute the 6
6t - 12 = 2(9 - 2t)
Distribute the 2
6t - 12 = 18 - 4t
Add 4t to both sides
10t - 12 = 18
Add 12 to both sides
10t = 30
Divide both sides by 10
t = 3
The answer is 3
Hope this helps!
To find how much Fiona makes per hour divide her earnings (y) by the number of hours worked (x).
42/3= $14 per hour
Phillip makes $12 per hour.
14-12 = 2
Fiona makes $2 more per hour tan Phillip
Answer:
The standard error of the mean is 0.85.
Step-by-step explanation:
The given standard deviation of a population (σ) = 7.8
sample size (N) = 85
We have to find standard error of the mean.
The formula to find standard error of the mean
= (standard deviation of the distribution) / (square root of sample size)
= (σ) / (√N)
= 7.8 / (√85)
= 7.8 / 9.219544457
= 0.8460
= 0.85 (approximately taken to two decimal places)
We have got the required answer.
The standard error of the mean is 0.85.