Two students are interested in whether or not there is variation in their test scores for math class. There are 15 total math tests they have taken so far. The first student's grades have a standard deviation of 38.2. The second student's grades have a standard deviation of 22.5. The second student thinks his scores are lower. State the null and alternative hypotheses.
Answer:
[tex]H_0=\sigma_1 =\sigma_2[/tex]
[tex]H_a=\sigma_1 >\sigma_2[/tex]
Step-by-step explanation:
From the question we are told that
Number of math tests n=15
standard deviation 1 [tex]\sigma _1=38.2[/tex]
standard deviation 1 [tex]\sigma _2=22.5[/tex]
Generally given the two tailed test the null hypothesis is given as
[tex]H_0=\sigma_1 =\sigma_2[/tex]
Generally given the two tailed test the null hypothesis is given as
[tex]H_a=\sigma_1 >\sigma_2[/tex]
HELP PLZZZZZZ!!!!!!!!!!!!!!!!!!!!!!!
Answer: B
Step-by-step explanation:
65 points!!!!
The angle of elevation from a park bench 778 feet from the base of the Gateway Arch. How tall is the Gateway Arch? Show all work.
Answer:
Answer: 630
Step-by-step explanation: 18 feet tall is the gateway arch . The angle of elevation from a park bench 778 feet from the base of the Gateway Arch in St
I NEED HELP WITH THIS
Answer:
its A and C and D
Step-by-step explanation:
Triangle ABC is shown below. Its original
lengths are multiplied by 150%. What is the
new perimeter of A'B'C'?
Answer:
75
Step-by-step explanation:
21 × 150% = 31.5
20 × 150% = 30
9 × 150% = 13.5
Perimeter formula: a + b + c
31.5 + 30 + 13.5 = 75
A comedian is planning to make his show more appealing by telling three jokes at the beginning of each show. He has been booked in a bar for the next three months. If he gives one performance a night, and he never wants to repeat the same set of jokes on any two nights, what is the minimum number of jokes he needs to prepare?
Answer:
135 jokes
Step-by-step explanation:
3 months = 90 days
90/2 = 45 days of new jokes
45 days x 3 jokes per day = 135 jokes
What slope would a line have to be perpendicular to a line with a slope of 1/4 ?
Answer:
A line perpendicular to another has a slope that is the negative reciprocal of the slope of the other line. The negative reciprocal of the original line is –2, and is thus the slope of its perpendicular line.
Step-by-step explanation:
Answer:
The slope is -4
What are the partial products for 3.2 x 0.6?
Answer:
This is a complete lesson with instruction & exercises for 5th grade about multiplying decimals by decimals. The interpretation for multiplying a decimal by a decimal is to think of it as taking a fractional part of a decimal number (the symbol × translates to "of"). The lesson compares multiplication by a decimal to scaling & shrinking a stick. Lastly, it shows the common shortcut to decimal multiplication (multiply as if there were no decimal points; the answer has as many decimals as the factors have in total.)
In the video below, I explain the rule for multiplying decimals (put as many decimal digits in the answer as there are in the factors.) I explain where this rule comes from, using fraction multiplication. The lesson continues below the video.
I really need help omgggggggg
Answer:
The 3rd one Abc is a congeuent
For the figures shown, which information can be used to show that ABC DEF?
Select all that apply.
Answer:
D, C and A
Step-by-step explanation:
Had this test so i know the answer
The triangles ΔACB and ΔDFE are congruent if ∠F is 90°. Then the correct option is D.
What is the triangle?The polygonal shape of a triangle has a number of sides and three independent variables. Angles in the triangle add up to 180 °.
The ratio of the matching sides will remain constant if two triangles are comparable to one another.
Prove that the triangles ΔACB and ΔDFE are congruent.
AB = DE (Given)
BC = EF (Given)
∠ACB = ∠DFE = 90°
The triangles ΔACB and ΔDFE are congruent if ∠F is 90°. Then the correct option is D.
More about the triangle link is given below.
https://brainly.com/question/25813512
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The _______ pair is the location of a point on the coordinate plane and contains the
x coordinate and y coordinate
Answer:
Ordered
Step-by-step explanation:
The ordered pair is the location of a point on the coordinate plane and contains the x coordinate and y coordinate
An ordered pair tells you the location of a point by relating the point's location along the x-axis (the first value of the ordered pair) and along the y-axis (the second value of the ordered pair). In an ordered pair, such as (x, y), the first value is called the x-coordinate and the second value is the y-coordinate.
In a group of 20 students, 1 studies both Art and Biology.
1 studies Biology but not Art.
7 study neither subject.
Given that a randomly selected student studies Art, what is the probability the student studies Art and Biology?
Answer:
1/12Step-by-step explanation:
Total number is 20.
Distribution is:
Art + Biology = 1Biology = 1Neither = 7The rest = 20 - 9 = 11, the Art students
Total number of Art students becomes 12
The probability would be then:
1/12what is the domain of (f/g)(x) 3x+1 / 5x-1
The radius of a circle is 3 yards. What is the circle's circumference?
Answer:
18.85
Step-by-step explanation:
2(3.14)(3)
If x^2=y^2+2y+6 and dx/dt=8. Find dy/dt at the point (3,1). I don't know how to find it at the point or how to start finding the derivatives.
Answer
dx/dt = ±3 when y = 6
derivate 3x^2 +x-5 using first principle
Answer:
6x+1
Step-by-step explanation:
Kayden is going to invest $2,100 and leave it in an account for 13 years. Assuming the
interest is compounded monthly, what interest rate, to the nearest tenth of a percent,
would be required in order for Kayden to end up with $5,200?
Answer:
0.58
Step-by-step explanation:
pv=-2100
fv=5200
n=13*12
Answer: 7.0%
Step-by-step explanation:
6.99504% = r
To rent a moving truck for the day, it costs $33 plus $1 for each mile driven.
a. Write an expression that represents the cost (in dollars) to rent the truck. Let $m$ represent the number of miles driven.
b. You drive the truck 300 miles. How much do you pay?
$29191 cours for dollars
A 2-quart carton of apple juice costs $4.56. What is the price per cup?
Answer:
57 cents
or
$0.57
Step-by-step explanation:
1 quart= 4 cups
2 quarts=8 cups
8 cups=4.56
Divide each side by 8
1 cup=0.57
Hope this Helps!
Let p: The kitchen is clean.
Let q: The bedroom is clean.
Which statement iS true if the kitchen is clean but the bedroom is not clean?
• If p is true, then q is true.
• Statement q if is true if and only if p is true.
• Both p and q are true.
• Statement p or q is true.
Answer:
the last one would be the answer as we know the kitchen is clean so it might be some if true
Anna is following this recipe to make biscuits.
Anna uses 540 mL of syrup.
How many grams of margarine will she need?
Recipe: Makes 24 biscuits
120 g sugar
135 mL syrup
200 g oats
150 g margarine
40 g chocolate
Answer:
The chocolate is needed is 40 gram chocolate
Hope this helps
Answer:
Its 40
Step-by-step explanation:
our work is samee
༼ つ ◕◡◕ ༽つ
ASAP: #43. Find the area of triangle ABC given A = 42.5°, b = 13.6, c = 10.1 (Draw a triangle, give answer to nearest tenth!)
Correct answer gets marked brainliest:)
Answer:
The area of a triangle A = 46.399 square units
Step-by-step explanation:
Explanation:-
Given that ΔABC
Given ∠ A = 42.5° and sides b= 13.6 and c =10.1
The area of a triangle
[tex]A = \frac{1}{2} b c sin A[/tex]
[tex]A = \frac{1}{2} 13.6(10.1) sin 42.5[/tex]
[tex]A = \frac{1}{2} 137.36(0.67559)[/tex] (∵ sin (42.5)° = 0.67559
A = 46.399 square units
What is the solution to 4x+6<18
Ox<3
Ox56
O x348
Ox596
Answer:
x<3
Step-by-step explanation:
Isolate the variable by dividing each side by factors that don't contain the variable.
4x - 3 = 2x + 7
What is x
Answer:
x=5
Step-by-step explanation:
HELP ME DO THIS PROBLEM PLEASE PLEASE
Answer:
p=1
Step-by-step explanation:
5p=p+4
5p-p=4
4p=4
p=1
5p=5×1=5
p+4=1+4=5
p+16=1+16=17
17p=17×1=17
Select five numbers that have 2, 5, and 11 as prime factors.
А
220
B
550
С
190
D
1,045
E
440
F
330
G
110
H
418
220, 550, 440, 330, 100 are the five numbers that have 2, 5, and 11 as prime factors. Hence, options (A), (B), (E), (F), (G) are correct.
What is prime factor?Prime factor is a constituent that is a prime number, in other words, any prime number that can be multiplied to get the original number.
Example: The first two components of 15 are three and five.
The given numbers can be written as:
the prime factor of 220 = 2 × 2 × 5 × 11
the prime factor of 550 = 5 × 2 × 5 × 11
the prime factor of 190 = 2 ×5 × 19
the prime factor of 1045 = 5 × 11 × 19
the prime factor of 330 = 3 × 2 × 5 × 11
the prime factor of 110 = 2 × 5 × 11
Hence, 220, 550, 440, 330, 100 are the five numbers that have 2, 5, and 11 as prime factors.
Learn more about prime factor here:
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Simplify the expression: 6x + 6 - 10x
At a local ballpark a team charges $10 per ticket the team must pay its players $4000 it costs the owner $6 for each souvenir they gave away how many tickets must be sold to break even
Answer:400
Step-by-step explanation:it didn’t say it gives away and souvenirs so the 6$ can be out the equation and 4000 divided by 10 is 400
The number of tickets that must be sold to break even is 1000 if at a local ballpark a team charges $10 per ticket the team must pay its players $4000.
What is linear equation?It is defined as the relation between two variables, if we plot the graph of the linear equation we will get a straight line.
If in the linear equation, one variable is present, then the equation is known as the linear equation in one variable.
The question is incomplete.
The complete question is:
At a local ballpark, a team charges $10 per ticket. The team must pay its players $4000. It costs the owners $6 for each souvenir they give away.
How many tickets must be sold to break even.
Let x be the number of tickets.
Let y be the total cost
From the data given in the question we can frame the linear equation in two variables:
y = 6x + 4000
y = 10x
After solving the above two linear equations in two variables.
6x + 4000 = 10x
10x - 6x = 4000
4x = 4000
x = 1000
Thus, the number of tickets that must be sold to break even is 1000 if at a local ballpark a team charges $10 per ticket the team must pay its players $4000.
Learn more about the linear equation here:
brainly.com/question/11897796
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Can y’all please help me I would really appreciate it I’m so sorry if you guys cannot see the picture!
Answer:
C is the answer
Step-by-step explanation:
You can see that 7 sixth graders and 8 eight graders and the question is asking 6th grade to 8th...... so 7:8 :)
ASSIGNMENTS
COURSES
Assignment - 15. Quiz 3: Word Problems
Attempt 1 of 2
SECTION 1 OF 1
QUESTIO
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9
10
11
12
13
14
15
>
After John worked at I job for 10 years, his salary doubled. If he started at $x, his salary after 10 years is
0.1
2
$x+ 2
$x-2
$2x
Answer:
Step-by-step explanation:
What