Answer:
B.
Step-by-step explanation:
its b just becauseeee
Answer:
5.93 < 5.917
Hope I was right, Have a good day!
the mean weight of 100 students in a certain class is 71kg the mean weight of boys is 65kg and that of girls is 75kg what is the number of boys and girls
Answer:
There are 60 girls and 40 boys in the class.
Step-by-step explanation:
Given that the mean weight of 100 students in a certain class is 71kg, while the mean weight of boys is 65kg and that of girls is 75kg, to determine what is the number of boys and girls the following calculation must be performed:
1 x 75 + 0 x 65 + 75
0.9 x 75 + 0.1 x 65 = 74
0.8 x 75 + 0.2 x 65 = 73
0.7 x 75 + 0.3 x 65 = 72
0.6 x 75 + 0.4 x 65 = 71
Thus, there are 60 girls and 40 boys in the class.
Scores turned in by an amateur golfer at the Bonita Fairways Golf Course in Bonita Springs, Florida, during and are as follows: 2018 Season: 74 78 79 77 75 73 75 77 2019 Season: 71 70 75 77 85 80 71 79 a. Use the mean (to the nearest whole number) and standard deviation (to decimals) to evaluate the golfer's performance over the two-year period. Mean Standard deviation Mean Standard deviation b. What is the primary difference in performance between and
Answer:
Step-by-step explanation:
The mean for 2018 scores is:
[tex]M ean ( \overline X) = \dfrac{\sum x_i}{n}[/tex]
[tex]M ean ( \overline X) = \dfrac{74 + 78+79+77+75+73+75+77}{8}[/tex]
[tex]M ean ( \overline X) = \dfrac{608} {8}[/tex]
[tex]\mathbf{M ean ( \overline X) = 76}[/tex]
The standard deviation for 2018 scores is:
[tex]s = \sqrt{\dfrac{\sum ( x_i - \bar x)^2}{n- 1} }[/tex]
[tex]s = \sqrt{\dfrac{ ( 74 -76)^2+( 78 -76)^2+( 79 -76)^2+...+( 73 -76)^2+( 75 -76)^2+( 77 -76)^2}{8- 1} }[/tex]
[tex]s = \sqrt{\dfrac{30}{7} }[/tex]
s = 2.07
The mean and standard deviation for the year 2018 scores is:
2018
Mean 76
Standard deviation 2.07
The mean for 2019 scores is:
[tex]M ean ( \overline X) = \dfrac{\sum x_i}{n}[/tex]
[tex]M ean ( \overline X) = \dfrac{71 + 70+75+77+85+80+71+79}{8}[/tex]
[tex]M ean ( \overline X) = \dfrac{608} {8}[/tex]
[tex]\mathbf{M ean ( \overline X) = 76}[/tex]
The standard deviation for 2019 scores is:
[tex]s = \sqrt{\dfrac{\sum ( x_i - \bar x)^2}{n- 1} }[/tex]
[tex]s = \sqrt{\dfrac{ ( 71 -76)^2+( 70 -76)^2+( 75-76)^2+...+( 80 -76)^2+( 71 -76)^2+( 79 -76)^2}{8- 1} }[/tex]
[tex]s = \sqrt{\dfrac{194}{7} }[/tex]
s = 5.26
The mean and standard deviation for the year 2019 scores is:
2019
Mean 76
Standard deviation 5.26
Difference: Both the two years have the same mean but the 2019 scores have higher variation as compared to 2018 scores.
Thus, the variation in scores was higher in 2019.
What is the face value of 2 in the number 286?
Answer:
200 or 2 I guess
Step-by-step explanation:
Ion really get wym by “ what is the face”
Please help!! I’ll Mark whoever has it right as brainliest
Answer:
multiplication answer: 6,435
addition answer: 38
subtraction answer: -12
Which inequality represents the number line below?
x = 3
x < 3
x > 3
x _> 3
Answer
try the inequality x >3
Step-by-step explanation:
because the circle is open and the line would have started at the 5 so the line would be going > and the circle ends at the 3
Srry if im bein confusing lol
9 1/4 - 3/4 =
6 4/9 - 3 11/12 =
3 11/15 - 1 5/6 =
4 5/14 - 3 17/21
Answer:
8 1/2
2 19/36
1 9/10
23/42
HELPPP PLEASEEEEEEEE
Answer. it fast please
Answer:
[tex](\frac{3}{4})^3 * (\frac{2}{3})^2 = \frac{3}{16}[/tex]
Step-by-step explanation:
Given
[tex](\frac{3}{4})^3 * (\frac{2}{3})^2[/tex]
Required
Solve:
[tex](\frac{3}{4})^3 * (\frac{2}{3})^2[/tex]
Apply law of indices
[tex](\frac{3}{4})^3 * (\frac{2}{3})^2 = \frac{3^3}{4^3} * \frac{2^2}{3^2}[/tex]
Express 4 as 2^2
[tex](\frac{3}{4})^3 * (\frac{2}{3})^2 = \frac{3^3}{(2^2)^3} * \frac{2^2}{3^2}[/tex]
[tex](\frac{3}{4})^3 * (\frac{2}{3})^2 = \frac{3^3}{2^6} * \frac{2^2}{3^2}[/tex]
Express as a singe fraction
[tex](\frac{3}{4})^3 * (\frac{2}{3})^2 = \frac{3^3*2^2}{2^6*3^2}[/tex]
Apply law of indices:
[tex](\frac{3}{4})^3 * (\frac{2}{3})^2 = \frac{3^{3-2}}{2^{6-2}}[/tex]
[tex](\frac{3}{4})^3 * (\frac{2}{3})^2 = \frac{3^1}{2^4}[/tex]
[tex](\frac{3}{4})^3 * (\frac{2}{3})^2 = \frac{3}{16}[/tex]
Using the compound interest formula, the "n" is what value when compounded annually?
Answer:
n=1
Step-by-step explanation:
N is the number of times per year
Annually would be one time per year so n =1
Answer:
If interest is compounded yearly, then n = 1; if semi-annually, then n = 2; quarterly, then n = 4; monthly, then n = 12; weekly, then n = 52; daily, then n = 365; and so forth, regardless of the number of years involved. Also, "t" must be expressed in years, because interest rates are expressed that way.
Step-by-step explanation:
It's a snip-it from the web, but it worked for me.
24. An office supply store has12 erasers for $1.84 or 20 erasers for $3.25. Which is the better
deal?
Answer: 1.84 I think because with 3.25 you can buy a bag of chips at Walmart with that much
what is 9 to 8 to simplest
3 and 4 is the lcd
lcd means least common factor
simpleest it ¾ the answer
Answer:
3/4 hope its helpssssssss
A group of 4 friends shares 2 packs of gum equally. There are 8 pieces of gum in
each pack. Which set of equations shows how many pieces of gum, g, each
friend receives?
may be the answer is :4g-2=8 ^-^
but donot depend in this answer it's not sure okay
If 1,560 students are enrolled in school and 85% ride the bus how many dont ride the bus
Answer:
234 student don’t ride the bus
Step-by-step explanation:
jst do 0.85 tiimes 1560
Answer:
234
Step-by-step explanation:
85% of 1,560 = 1326
1,326 - 1,560 = 234
What is the boundary line for the linear inequality 4x + 2y < 18?
Answer:
Simplifying
x = 4.5 + -0.5y
Step-by-step explanation:
The boundary line of the inequality is intersecting the x-axis at 4.5.
The given inequality is 4x + 2y < 18.
What is the boundary line for linear inequality?A linear inequality divides the coordinate plane into two halves by a boundary line where one half represents the solutions of the inequality. The boundary line is dashed for > and < and solid for ≤ and ≥. The half-plane that is a solution to the inequality is usually shaded.
Graph the inequality by finding the boundary line, and then shading the appropriate area.
Now, 4x + 2y < 18 can be written as y<−2x+9.
The boundary line of the inequality is given below.
The boundary line of the inequality is intersecting the x-axis at 4.5.
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Evaluate 4x + 5y, when x = 7 and y = 10
Answer:
78
Step-by-step explanation:
4 x 7 = 28
5 x 10 = 50
50 + 28 = 78
3 ÷ 3/4 what is the answer i need help
Answer:
The answer is 4
Step-by-step explanation:
A tv sells for $300 and is marked down 30%. What is the amount of
the discount and the sale price
Answer:
the amount of discount is $210
Step-by-step explanation:
30(.30)
90
90 is 30% of 300
subtract:
300-30= 210
Answer:$210
Step-by-step explanation:
The river raft ride the music park can hold 12 riders at a time there are 527 people in line how many times will the ride need to run in order to get all 527 people through the right?
2. Lin solved a quadratic equation by factoring and found one solution to be x = 3/4.
Which of the following expressions could have been one of her factors?
A.x-3
B. 4x +3
C. 3x – 4
D. 3x +4
A researcher is dividing a sample with a mass of 9.2 * 10 ^ - 3 grams into smaller samples with a mass of 2.3 * 10 ^ - 4 grams . How many smaller samples will she be able to make?
Answer: C) 400
Step-by-step explanation:
What is the percentage plz help me with this Question.
Answer:
percentage is a number or ratio expressed as a fraction of 100.
Step-by-step explanation:
Write an equation of the line that passes through the points (−6,20) and (0, 8).
Answer:
y = -2x + 8
Step-by-step explanation:
(−6, 20) and (0, 8)
First you want to find the slope of the line that passes through these points. To find the slope of the line, we use the slope formula: (y₂ - y₁) / (x₂ - x₁)
Plug in these values:
(8 - 20) / (0 - (-6))
Simplify the parentheses.
= (-12) / (6)
Simplify the fraction.
-12/6
= -2
This is your slope. Plug this value into the standard slope-intercept equation of y = mx + b.
y = -2x + b
To find b, we want to plug in a value that we know is on this line: in this case, I will use the second point (0, 8). Plug in the x and y values into the x and y of the standard equation.
8 = -2(0) + b
To find b, multiply the slope and the input of x(0)
8 = 0 + b
b = 8
Plug this into your standard equation.
y = -2x + 8
This is your equation.
Check this by plugging in the other point you have not checked yet (-6, 20).
y = -2x + 8
20 = -2(-6) + 8
20 = 12 + 8
20 = 20
Your equation is correct.
Hope this helps!
of equations to answer the questions.
2x + 3y = 3
y = 8 - 3x
The value of y from the second equation is substituted back into the first equation. What is the resulting eq
What is the value of x?
What is the value of y?
Da
Which is the last operation performed when evaluating (8 minus 2 x) squared + 4 for x = 3? addition multiplication subtraction applying the exponent
Answer:
addition
Step-by-step explanation:
Answer:
Addition
Step-by-step explanation:
PEMDAS: Parentheses, Exponent, Multiply, Divide, Add, Subtract. (The multiply and divide can be swapped, as well as the add and subtract :3) Hope this helps! :D
There are many cylinders for which the height and radius are the same value. Let represent the height and radius of a cylinder and represent the volume of the cylinder.
Write an equation that expresses the relationship between the volume, height, and radius of this cylinder using and .
If the value of is halved, what must happen to the value of the volume ?
A 2-column table with 4 rows. Column 1 is labeled Situation with entries increasing, difference, finding part of a total, sharing or grouping. Column 2 is labeled Operation with entries +, minus, times, divided by. Jackson downloaded 6 songs for $7.80. What was the cost of each song? The variable, c, represents The cost of each song is part of a total, so the operation is The correct equation to solve this problem is
Answer:
For this case we can see the table as a set of ordered pairs.
We then have the following ordered pairs:
(-6, -7)
(-1,1)
(0, 9)
(3, -2)
Then, the domain of the function is represented by all the values of x.
We have then:
{x | x = –6, –1, 0, 3}
Answer:
{x | x = –6, –1, 0, 3}
Step-by-step explanation:
Answer:
Jackson downloaded 6 songs for $7.80. What was the cost of each song?
The variable, c, represents
✔ the cost of one song
The cost of each song is part of a total, so the operation is
✔ multiplication
The correct equation to solve this problem is
✔ 6c = 7.80
Step-by-step explanation:
The cost of renting a sailboat at a lake is $70
Answer:
y=70x+12
Step-by-step explanation:
y= amount of total money spent
x= amount of hours
What is the 7th term in the following sequence? 48,40,32,24
Brainless answer !!!!!
Answer:
-8
Step-by-step explanation:
an=−8n+56
PLSSSSSS HELP!!!! TIME LIMITEDDD!!!!!! Joan wants to draw a picture that includes a pair of complementary angles. Joan wants one of the angles to be 18° more than the other angle. Select True or False for each statement about the angles.
The smaller angle is 18°.
The smaller angle is 36°.
The larger angle is 54°.
The larger angle is 72°.
Answer:
True: The smaller angle is 36°; The larger angle is 54°
False: The smaller angle is 18°. The larger angle is 72°
If you create an equation using this scenario, it would be (18+x)+x=90, because complementary angles sum up to 90°. Add the like terms to get 18+2x=90. Subtract 18 on both sides to get 72. Divide 2 on both sides to result with x=36. Subtract 90 with 36 to get 54. The smaller angle is 36° and the larger angle is 54°.
What is the vertex of the graph of the function f(x) = x2 + 10?
A. (0.10)
B. (10,0)
C (-10,0)
D (0-10)
Answer:
a
Step-by-step explanation:
The vertex of the function f(x) = x²+10 is (0,10). Correct option is (A).
What is the vertex form of an equation?Vertex form of equation is an alternate way of writing the equation of a parabola
The vertex form of an equation is
f(x)= a(x-h)²+k,
Here, h and k are constants
The given equation is,
f(x) = x²+10
To determine the vertex of the equation,
substitute x=0,
f(x)=0+10
f(x)=10
The vertex of the function f(x) is (0,10).
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