Answer:
Step-by-step explanation:
- Identify Like Terms: <em>a</em> and <em>2a</em> are like
- Combine Like Terms: <em>a + 2a = 3a</em>
- Substitute to Form an Expression: <em>3a + 7</em>
Sincerely,
<em>Gigabyte</em>
Answer:
(3.2189, 4.4811)
Step-by-step explanation:
Given that you conduct simple random sampling of 20 students in a school with a population of 300 students to determine how many students are in each ride-share (carpool) on the way to school every day to get a good idea of who would use the app.
The following data are collected:
6 5 5 5 3 2 3 6 2 2 5 4 3 3 4 2 5 3 4 5
We find from the data the following summary
Mean 3.85
Standard Error 0.30153118
Median 4
Mode 5
Standard Deviation 1.348488433
Sample Variance 1.818421053
Kurtosis -1.29567952
Skewness 0.014666866
Range 4
Minimum 2
Maximum 6
Sum 77
Count 20
Confidence Level(95.0%) 0.631112012
Margin of error = 0.6311
Hence confidence interval would be (Mean - margin of error, mean + margin of error)
= 
Answer: area of shaded region is 141.3 cm²
Step-by-step explanation:
We would assume that the shade region is the area between both circles. The area of the shaded region is the area of the outer circle - the area of the inner circle.
The formula for determining the area of a circle is expressed as
Area = πr²
Where
r represents the radius of the circle.
π is a constant whose value is 3.14
Considering the inner circle,
Radius = 6 cm
Area = 3.14 × 6² = 113.04 cm²
Considering the outer circle,
Radius = 9 cm
Area = 3.14 × 9² = 254.34 cm²
Area of the shaded region is
254.34 - 113.04 = 141.3 cm²
The first step in calculating the mean is to add the numbers. After that you divide by the number of items in the data set. You don’t need to group the numbers to find the mean. Hope this helped!
X=8
Explanation:
f(x)=x^2-16x+64+(x-8)^2
You see there is a double x- intercept by the 8. So the parabola is tangent to the x axis. So x=8 f(x)=0
hope this helps <span />
