The dot plots is an illustration of charts and graphs
The average score of period 7 is greater than the average score of period 1
How to determine the period with the higher average?From the dot plots in the complete question, we have the following frequency tables
Period 1 Period 7
Score Students Score Students
55 1 65 1
70 1 75 3
75 6 80 5
80 6 85 6
85 2 90 3
90 3 95 2
95 1
The average is calculated using:
[tex]\bar x = \frac{\sum fx}{\sum f}[/tex]
For period 1, we have:
[tex]\bar x_1 = \frac{55 * 1 + 70 * 1 + 75 * 6 + 80 * 6 + 85 * 2 + 90 * 3 + 95 * 1}{1 + 1 + 6 + 6 + 2 + 3 + 1}[/tex]
Evaluate the sum
[tex]\bar x_1 = \frac{1590}{20}[/tex]
Evaluate the quotient
[tex]\bar x_1 = 79.5[/tex]
For period 7, we have:
[tex]\bar x_7 = \frac{65 * 1 + 75 * 3 + 80 * 5 + 85 * 6 + 90 * 3 + 95 * 2}{1 + 3 + 5 + 6 + 3 + 2}[/tex]
Evaluate the sum
[tex]\bar x_7 = \frac{1660}{20}[/tex]
Evaluate the quotient
[tex]\bar x_7 = 83[/tex]
By comparison, 83 is greater than 79.5
Hence, the average score of period 7 is greater than the average score of period 1
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The radius of a circle is 1 kilometer. What is the circle's area?
Use 3. 14 for . Square kilometers
Answer:
3.14km^2
Step-by-step explanation:
area of circle= πr^2
=3.14×1^2
=3.14km^2
Answer:
[tex]\boxed{\sf{3.14\ km^2}}[/tex]Step-by-step explanation:
Given:
Use the formula of area of circle.Area of circle:
[tex]\Longrightarrow: \sf{A=\pi r^2}[/tex]
Solutions:
Radius of a circle is 1 kilometer.[tex]\Longrightarrow: \sf{3.14*1^2}[/tex]
Solve.
[tex]\sf{1^2=1*1=1}[/tex]
[tex]\sf{3.14*1=\boxed{\sf{3.14\ km^2}}[/tex]
Therefore, the correct answer is 3.14km².I hope this helps, let me know if you have any questions.
If carol travels 4 miles and her car averages 28 miles per hour, how long will it take carol to complete the distance? Express this situation in an equation, making t the variable of time
Answer: t= Distance/Speed = 4/28= 1/7
Step-by-step explanation:
Speed is 28miles /hr
Distance = 4miles
Distance = Speed × time
Time(t) = Distance /Speed
Farrah borrowed $155 from her brother. She has already paid back $15. She plans to pay back $35 each month until the debt is paid off.
Which describes the number of months it will take to pay off the debt? Select three options.
x + 15 + 35 = 155
35 x + 15 = 155
35 x = 155 minus 15
It will take 8 months to pay off the debt.
It will take 4 months to pay off the debt.
Find the first four terms, in thousands, of the geometric series. round to the nearest thousand. a1 = a2 = a3 = a4 =
The geometric series an = 400(1.05)^(n-1) has a common ratio and an initial term
The first four terms are a1 = 400; a2 = 420; a3 = 441 and a4 = 463.05
How to determine the first four terms?The geometric series is given as:
an = 400(1.05)^(n-1)
Substitute 1 for n
a1 = 400 * (1.05)^(1-1)
Evaluate the product
a1 = 400
Substitute 2 for n
a2 = 400 * (1.05)^(2-1)
Evaluate the product
a2 = 420
Substitute 3 for n
a3 = 400 * (1.05)^(3-1)
Evaluate the product
a3 = 441
Substitute 4 for n
a4 = 400 * (1.05)^(4-1)
Evaluate the product
a4 = 463.05
Hence, the first four terms are
a1 = 400; a2 = 420; a3 = 441 and a4 = 463.05
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Answer:
a1 = 400
a2 = 420
a3 = 441
a4 = 463
C
Step-by-step explanation:
Counselors at Rockport High School and Riverdale High School surveyed the graduating seniors to find out their post-high-school plans. Each student plans to attend college, attend technical school, join the military, or go right into the workforce. The results of the survey are shown in the table.
The percentage shows that they were 28% more likely to come from Riverdale High school.
How to calculate the percentage?From the information given, the percentage of those from Rockport will be:
= 25/(25 + 44) × 100.
= 25/69 × 100
= 36.23%
The percentage of those from Riverdale will be:
= 44/(25 + 44) × 100.
= 44/69 × 100
= 63.77%
Therefore, the difference will be:
= 63.77% - 36.23%
= 28% approximately.
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help me with this one
I need full explanation
50 points+ Brainliest !??
Answer as fast as possible..
The answer is there all I need is the process
This is the answer of your question
58°
47°
Find the value of x
Step-by-step explanation:
The question is not complete or correct
4
Adam's
age is 3 years and 6 months.
Zara's age is 2 years and 11 months.
.
Write Adam's age in months as a fraction of Zara's age in months.
Give your fraction in its simplest form.
The question is an illustration of fraction division and Adam's age as a fraction of Zara's age is 7/5
How to represent the age as a fraction?The ages are given as:
Adam = 3 years and 6 months
Zara = 2 years and 11 months
Rewrite the ages in months
Adam = 3 * 12 + 6 = 42 months
Zara = 2 * 12 + 11 = 35 months
Adam's age as a fraction of Zara's age is calculated using:
Fraction = Adam/Zara
This gives
Fraction = 42/35
Simplify
Fraction = 7/5
Hence, Adam's age as a fraction of Zara's age is 7/5
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how do you get from 24 to a hundred
Hello people ~
factorise : 5x²+16x+3
Done!
Answer:
Step-by-step explanation:
Remark
If the trinomial is going to factor, it must factor as 5 and 1 paired with 3 and 1 as both 5 and 3 do not factor any further. They are prime numbers.
Let's try this:
(5x + 1) ( 1x + 3)
Both factors must contain an + otherwise something in the given equation would be - when the factors are expanded.
It looks like this works. 5 * 3x + 1x = 16x
Will mark brainlyest: What characteristic of the general quadratic equation below determines whether the corresponding graph has a vertical stretch? y = a(x - h)^2 + k
A: If k is positive
B: If " a " is less than zero
C: If k is negative
D: If :" a " is greater than 1
Answer:
D
Step-by-step explanation:
First of all, "k" has nothing to do with determining vertical shrink/stretch, and therefore A and C can be eliminated from the choices. A shrink occurs with a fractional "a" value, so "a" must be greater than 1 in order for a vertical stretch to occur.
a car uses 9 gallons of gasoline to go 162 miles. how many gallons of gasoline will the same car use to travel 216 miles?
Answer:
[tex]12\ gallons[/tex]
Step-by-step explanation:
Step 1: Determine the unit rate
[tex]Miles / Gallons[/tex]
[tex]162\ miles / 9\ gallons[/tex]
[tex]18\ miles/gallon[/tex]
Step 2: Determine the amount of gasoline used for 216 miles
[tex]216\ miles * (gallon / 18\ miles)[/tex]
[tex]12\ gallons[/tex]
Answer: [tex]12\ gallons[/tex]
Answer:
12
Step-by-step explanation:
1. Figure out how many miles the car can go with one gallon of gasolline
162 ÷ 9 = 18
1 gallon = 18 miles
2. Figure out how many times 18 can go into 216
216 ÷ 18 = 12
12 gallons = 216 miles
*We do this because we know that every time the car drives 18 miles its uses another gallon of gas.
The car will use 12 gallons of gasoline to travel 216 miles.
The circumference of a circle is 59.032 centimeters. What is the circle's radius?
Answer:
9.4
Step-by-step explanation:
I used r=C/2π as the formula
What is 0.¯47 expressed as a fraction in simplest form?
Answer:
The answer would be 47/99
Step-by-step explanation:
can someone help me please
Answer: area
Step-by-step explanation:
Area is solved with L * W
Volume is solved with L * W * H
Using these formulas we can see that area uses 2-dimensions, the length and the width, while volume uses 3.
Answer:
Area.
Step-by-step explanation:
2 dimentional spaces have only area, and no volume. Volume describes the amount of space within the container
If 840 CLASS eighth graders, making up 4/5 of total eighth, studied algebra during summer, how many eighth graders are enrolled with CLASS
Answer:
1008
Step-by-step explanation:
If 4/5 of eighth graders, or 80%, are enrolled with class, there are still 20% of students that didn't study. That means you add 168, the 20%, and you'll get 1008.
Quick please I need this before I go
Answer:
143/63 or 2 and 17/63
Step-by-step explanation:
multiply the length times the width
13/9 x 11/7
A golf ball has been hit off of the tee at an angle of elevation of 30 degrees and an initial velocity of 160 ft/sec.
The horizontal distance that's traveled by the golf ball based on the velocity given is 138.56feet.
How to compute the distance?From the information given, the golf ball has been hit off of the tee at an angle of elevation of 30 degrees and an initial velocity of 160 ft/sec.
The distance will be:
= 160 × cos30°
=160 × 0.866
= 138.56 feet
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A _____________ is a line that provides an approximation of the relationship between the variables.
Answer:
srat
Step-by-step explanation:hehe i really dont know
18. What is an equation of the line that passes through the point (3, -1) and is perpendicular to the equation
y = -3x + 2?
A. y = -3x + 8
B. y = -3x
C. y = 1/3x
D. y = 1/3x - 2
CAN SOMEONE PLEASE SHOW ME HOW TO SLOVE THIS
Answer:
It’s D
Step-by-step explanation:
Answer:
D. y = 1/3x - 2Step-by-step explanation:
It mentions the new line is perpendicular to the original line.
New slope = -(1/-3) = 1/3It also mentions it passes through the point (3, -1).
Using point-slope form of equation,
y + 1 = 1/3(x - 3)y + 1 = 1/3x - 1y = 1/3x - 2What is the slope of the line?
Answer:
1/3
Step-by-step explanation:
Slope is rise over run.
Pick a point and count how many steps up and how many steps to the right you need to make to get to the next point. That's how you find slope.
Please help!! Will mark brainlyest.
Answer
B
Step-by-step explanation
Please give me brainlist.
Find 3 ratios that are equivalent to the given ratio.
2/7
Answer:
I've got lots of ratios for you.
4/14
6/21
8/28
10/35
12/42
14/49
16/56
18/63
To calculate a ratio, next time do this...
If you are comparing one (A) to another (B), your formula would be A/B.
This means you are dividing information A by information B.
For example, if A is 5 and B is 10, your ratio will be 5/10.
Simple as that.
YW!!
Answer:
1) 3:4. 2) 30:40. 3) 45:80
Step-by-step explanation:
15:20 CAN SIMPLIFEY BY 5 SO. 15/5 =3 20/5=4 SO OVERALL ITS 3:4
Consider the triangle
What is the value for x?
yº
25°
90°
What is the value for y?
--
please hurry!
add the degrees 90 and 25 which gives 115° and subtract to give 65°
I am subtracting by 180 because angle on a straight line is 180 hope this helps
Answer: y is 155⁰ X is 65⁰
Step-by-step explanation: y = 180⁰ - 25⁰
X = 180⁰ - (90 + 25) = 180 - 115= 65
Straight line triangle is 180
Total angle in a triangle 180
Cross out the numbers below that are NOT equivalent to 500.0.
500.00 5 × 10 5 × 102 50.05 500.500
Answer:
500.00 equal
5 × 10 not equal
5 × 10² equal
50.05 not equal
500.500 not equal
Sammy plans to build a kite He has two rods of lengths 4 feet and 3 feet Find the area of the material he will need to cover the kite A: 7 ft2
B: 3 ft2
C: 6 ft2
D: 12 ft2
Which is the radius of a circle whose equation is (x-7)^2+(y-10)^2=4
Answer:
2
Step-by-step explanation:
Standard form of a circle (x-h)^2 + (y-k)^2 = r^2
this circle is already in this form
the center will be at h, k or 7,10
the radius^2 = 4 so radius = 2
I need help with trigonometry hw
Answer
See in pic
Step-by-step explanation:
Which term of the AP 2,8,14,20..... Will be 210 more than it's 60th term?
Answer:
95th term
Step-by-step explanation:
the nth term of an AP is
[tex]a_{n}[/tex] = a₁ + (n - 1)d
where a₁ is the first term and d the common difference
here a₁ = 2 and d = a₂ - a₁ = 8 - 2 = 6 , then
[tex]a_{n}[/tex] = 2 + 6(n - 1) = 2 + 6n - 6 = 6n - 4
the 60th term is then
a₆₀ = 6(60) - 4 = 360 - 4 = 356
so 210 more than a₆₀ = 356 + 210 = 566
now equate [tex]a_{n}[/tex] to 566 and solve for n
6n - 4 = 566 ( add 4 to both sides )
6n = 570 ( divide both sides by 6 )
n = 95
Answer:
95th term.
Step-by-step explanation:
The sequence of 2, 8, 14, 20 . . . can be predicted by adding 6 to each successive term. This can be written as 6n+2, where n starts at 0 for the first term.
n Value (6n+2)
0 2
1 8
2 14
3 20
4 26
60 362
---
We want to know what term is 210 more than 362. (362+ 210) = 572
We can solve by using the equation in reverse and solving for n:
(6n+2) = 572
6n = 570
n = 95
The 95th term (572) is greater than the 60th term (362) by 210.
2r +8= 26
» What is the value of r?
meters
Answer:
r = 9 meters
Step-by-step explanation:
2r + 8 = 26 <== subtract 8 from both sides
- 8 - 8
2r = 18 <== divide both sides by 2 to isolate the variable
/2 /2
r = 9 meters
Hope this helps!
Answer:
[tex]\boxed{\sf{r=9}}[/tex]Step-by-step explanation:
To find the value of r, isolate it on one side of the equation.
[tex]\sf{2r+8=26}[/tex]
First, you have to subtract by 8 from both sides.
[tex]\sf{2r+8-8=26-8}[/tex]
Solve.
Subtract the numbers from left to right.
26-8=18
2r=18
Divide by 2 from both sides.
[tex]\sf{\dfrac{2r}{2}=\dfrac{18}{2} }[/tex]
Solve.
Divide the numbers from left to right.
18/2=9
r=9
Therefore, the correct answer is r=9 meters.I hope this helps. Let me know if you have any questions.