The standard deviation is 1.98. Option A is correct.
The standard deviation formula is given as
where:
- SS is the sum of squares = 200
- n is the sample size = 51
Substitute the given parameters into the formula to have:
Hence the standard deviation is 1.98
Learn more on standard deviation here: brainly.com/question/12402189
Answer:
Problems left to complete = 9
Step-by-step explanation:
Given that:
Number of problems on the test = 45
Percent of completed problems = 80%
Number of completed problems =
Number of completed problems = 0.8 * 45 = 36
Problems left to complete = 45 - 36
Problems left = 9
Hence,
Problems left to complete = 9
Answer:
55.5 square feet
Step-by-step explanation:
so the dog house consists of 4 walls, two roof sections, and two triangle bits to make the roof pointy (I'm sure they have a name but I don't know what it is lol) Of the walls there would be 2 of the longer walls and 2 of the shorther ones. Knowing this we just have to add together the area of each part to find the total surface area.
So starting with the walls:
two of them are 4 feet by 2 feet.
The area of a rectangle is just length x width
so those two would have an area of 8 ft^2
and the other two are 3 feet by 2 feet so they would have an area of 6 ft^2
the roof sections are also rectangles with dimensions of 4 feet by 2.5 feet
4x2.5=10 so each side of the roof has a surface area of 10 ft^2
now the triangle parts have a base of 3 feet and a height of 2.5 feet
the formula for area of a triangle is base x height / 2
3x2.5=7.5
7.5/2= 3.75
now we add them together
8+8+6+6+10+10+3.75+3.75=55.5
so the total surface area is 55.5 square ft
Answer:
1. (x + 4)(9x + 6)
2. (3x + 6)(3x + 4)
3. (9x + 4)(x + 6)
Step-by-step explanation:
9x² + 42x + 24
9x² + 36x + 6x + 24
9x(x + 4) + 6(x + 4)
(x + 4)(9x + 6)
9x² + 30x + 24
9x² + 12x + 18x + 24
3x(3x + 4) + 6(3x + 4)
(3x + 4)(3x + 6)
9x² + 58x + 24
9x² + 54x + 4x + 24
9x(x + 6) + 4(x + 6)
(9x + 4)(x + 6)
It is a trick question 13+13 DOES equal 26