Step-by-step explanation:
3x - 4 < 12
3x < 16
x < 16/3
We are looking for a set with elements that are less than 16/3 or 5.333...
Only Set 4's elements are all less than 16/3. Hence it is the answer.
Answer:
The t-score is t = 2.457.
Step-by-step explanation:
The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So
df = 31 - 1 = 30
98% confidence interval
Now, we have to find a value of T, which is found looking at the t table, with 30 degrees of freedom(y-axis) and a one-tailed confidence level of . So we have T = 2.457.
The t-score is t = 2.457.
Answer:
799/800
Step-by-step explanation:
800/800 - 1/800 = 799/800
Answer:
√8·x + 4 > 20
Step-by-step explanation:
Area of Square lawn = 8·x feet²
Now, area of square = (side)²
⇒ Side length of square lawn = √8·x feet
Now, extended length of the lawn from both sides = 2 + 2 = 4 feet
Now, new side length of the square lawn = 8·x + 4
New area of the square lawn = (√8·x + 4)² square feet
Area of the brick purchased = 20 × 20
= (20)² square feet
Now, it is given Aroldo does not have enough feet of bricks
⇒ Area of bricks purchased is less than area of the square lawn with new dimensions
⇒ (√8·x + 4)² > (20)²
⇒ √8·x + 4 > 20