PLEASE HELP ME THANKS :( By decreasing each dimension by 3 units, the area of a rectangle decreased from 60 square feet to 18 square feet. Find the percent decrease in area.
Answers
Answer: 30%
Step-by-step explanation: Ok so, 100(%) = 60
1 = 100/60
18 = (100/60).18
( I hope this helped <3 )
Related Questions
help please (ty to the people who know this) :)
Answers
Answer:
C) \(3c-5d\)
Step-by-step explanation:
\(-c+5d+7c-11d+d-3c\)
Group the similar terms together:
\(-c+7c-3c+5d-11d+d\)
Add/subtract the "c" variables:
\(3c+5d-11d+d\)
Add/subtract the "d" variables:
\(3c-5d\)
Answer:
The answer is C) 3c-5d
Step-by-step explanation:
The stem-and-leaf plot displays data collected on the size of 15 classes at two different schools.
Mountain View School Seaside School
0 5, 8
9, 8, 2, 0 1 0, 1, 2, 5, 6, 8
8, 7, 6, 5, 5, 4, 4, 3, 1, 0 2 5, 5, 7, 7, 8
0 3 0, 6
Key: 2 | 1 | 0 means 12 for Mountain View and 10 for Seaside
Part A: Calculate the measures of center. Show all work. (2 points)
Part B: Calculate the measures of variability. Show all work. (1 point)
Part C: If you are interested in a smaller class size, which school is a better choice for you? Explain your reasoning. (1 point)
Answers
For Mountain View School:
Data: 0, 0, 0, 0, 1, 2, 3, 4, 4, 5, 5, 5, 5, 6, 7, 8, 8, 8, 9
Mean: (0 + 0 + 0 + 0 + 1 + 2 + 3 + 4 + 4 + 5 + 5 + 5 + 5 + 6 + 7 + 8 + 8 + 8 + 9) / 19
= 100 / 19
≈ 5.26
To find the median, we need to arrange the data in ascending order: 0, 0, 0, 0, 1, 2, 3, 4, 4, 5, 5, 5, 5, 6, 7, 8, 8, 8, 9.
The median is the middle value, which is the 10th value in this case.
Median: 5
For Seaside School:
Data: 0, 0, 0, 1, 1, 2, 2, 4, 5, 5, 5, 5, 6, 7, 7, 8, 8, 8, 9
Mean: (0 + 0 + 0 + 1 + 1 + 2 + 2 + 4 + 5 + 5 + 5 + 5 + 6 + 7 + 7 + 8 + 8 + 8 + 9) / 19
= 80 / 19
≈ 4.21
To find the median, we need to arrange the data in ascending order: 0, 0, 0, 1, 1, 2, 2, 4, 5, 5, 5, 5, 6, 7, 7, 8, 8, 8, 9.
The median is the middle value, which is the 10th value in this case.
Median: 5
Now let's calculate the measures of variability, specifically the range and interquartile range (IQR).
Range: The range is the difference between the largest and smallest values in the dataset.
For Mountain View School:
Range: 9 - 0 = 9
For Seaside School:
Range: 9 - 0 = 9
Interquartile Range (IQR): The IQR is the difference between the third quartile (Q3) and the first quartile (Q1) and measures the spread of the middle 50% of the data.
For Mountain View School:
Q1 = 3
Q3 = 7
IQR = Q3 - Q1 = 7 - 3 = 4
For Seaside School:
Q1 = 2
Q3 = 7
IQR = Q3 - Q1 = 7 - 2 = 5
To determine which school is a better choice for a smaller class size, we can consider both the mean and the median.
Both the mean and median for Mountain View School are higher than those for Seaside School. This suggests that, on average, the class sizes at Mountain View School are larger than those at Seaside School. Therefore, if you are interested in a smaller class size, Seaside School would be a better choice
For Mountain View School:
- Median: The median class size is the middle value, which is 25.
- Mean: The mean class size is the sum of all the class sizes divided by the total number of classes, which is (29 + 28 + 28 + 27 + 25 + 24 + 24 + 23 + 21 + 20 + 19 + 18 + 15 + 13 + 10) / 15 = 21.27.
For Seaside School:
- Median: The median class size is the middle value, which is 20.
- Mean: The mean class size is the sum of all the class sizes divided by the total number of classes, which is (25 + 25 + 27 + 27 + 28 + 28 + 28 + 30 + 31 + 35 + 36 + 38 + 40 + 43 + 45) / 15 = 31.13.
Part B:
For Mountain View School:
- Range: The range is the difference between the largest and smallest values, which is 29 - 10 = 19.
- Interquartile Range (IQR): The IQR is the difference between the third quartile (Q3) and the first quartile (Q1). From the stem-and-leaf plot, we can see that Q1 is 20 and Q3 is 28. Therefore, the IQR is 28 - 20 = 8.
For Seaside School:
- Range: The range is the difference between the largest and smallest values, which is 45 - 25 = 20.
- Interquartile Range (IQR): The IQR is the difference between the third quartile (Q3) and the first quartile (Q1). From the stem-and-leaf plot, we can see that Q1 is 27 and Q3 is 38. Therefore, the IQR is 38 - 27 = 11.
Part C:
If you are interested in a smaller class size, Mountain View School is a better choice for you because it has a lower mean and median class size than Seaside School.
Complete the statements.
If both expressions have the same value after substituting two different values and simplifying, then they are
.
When p = 2, the first expression is
and the second expression is 16.
When p = 8, the first expression is 40 and the second expression is
.
The expressions are
.
Answers
Answer:
Step-by-step explanation:
when p is 2 you will have to dived the defeated so the answer is
Shelly is asked to put parentheses in the equation
14−8−5+6×2=23 so that it is true.
Choose the correct expression.
A. 14−8−(5+6)×2=23
B. 14−(8−5)+6×2=23
C. 14−8)−(5+6)×2=23
D. 14−(8−5+6)×2=23
Answers
Answer:
C)(14-8)-(5+6)×2=23
using bodmas
pls help meeeee
A customer purchased x gallons of gas for $2.98 each. The customer gives the cashier $20.00 and gets $2.12 in return.
How many gallons of gas did the customer buy?
Answers
Answer:
6 gallons of gas
Step-by-step explanation:
20.00 - 2.12 = 17.88
17.88 divided by 2.98 equals 6
Pls help me ill give brainly just pls solve both parts of the question
No bots or ill report
Answers
Answer:
THEY START AT A DIFFERENT PLase sorry about all caps
Step-by-step explanation:
Answer:
E: start at the rate of 30
F: starts at the rate of 20
Step-by-step explanation:
because if you look at the one u go up from that to what ever number hits it first
Solve for the variable: -5n < 25
A. n < 5
B. n < -5
C. n > 5
D. n > -5
Answers
Answer:
e
Step-by-steep explanation:
e
An open sentence that contains the symbol , or ≥ is called a(n)
Answers
Answer:
It is called an inequality.
hope this helps!
Step-by-step explanation:
1) Each lunch for a school field trip has a turkey, roast beef, or bologna sandwich, an orange or apple for a fruit, and a cookie or muffin for dessert. Amanda and Zack would like to…
-know the number of possible lunch options.
-P of having any meal with NO COOKIE.
(use sample space, tree diagram, and counting principle)
Answers
1) there are 12 possible lunch options. 2) the probability of having any meal with no cookie is 1/2 or 0.5.
How to find the number of possible lunch options.1) Number of possible lunch options:
To determine the number of possible lunch options, we need to consider the choices for each component of the lunch.
- Sandwich: There are 3 options (turkey, roast beef, or bologna).
- Fruit: There are 2 options (orange or apple).
- Dessert: There are 2 options (cookie or muffin).
Using the counting principle, we multiply the number of options for each component together:
Number of possible lunch options = 3 (sandwich options) × 2 (fruit options) × 2 (dessert options) = 12.
Therefore, there are 12 possible lunch options.
2) Let's examine the favorable outcomes for each component:
- Sandwich: There are still 3 options (turkey, roast beef, or bologna).
- Fruit: There are 2 options (orange or apple).
- Dessert: There is 1 option (muffin, as we want to exclude cookies).
Using the counting principle, we multiply the number of options for each component together:
Number of favorable outcomes (no cookie) = 3 (sandwich options) × 2 (fruit options) × 1 (muffin option) = 6.
The total number of possible outcomes is still 12 (as calculated in the previous step).
Therefore, the probability of having any meal with no cookie is:
P(No cookie) = Number of favorable outcomes / Total number of possible outcomes = 6 / 12 = 1/2 or 0.5.
Hence, the probability of having any meal with no cookie is 1/2 or 0.5.
Learn more about probability at https://brainly.com/question/13604758
#SPJ1
Answer:
1) there are 12 possible lunch options. 2) the probability of having any meal with no cookie is 1/2 or 0.5.
Step-by-step explanation:
HELP ASAP!! A student is painting a brick for his teacher to use as a doorstop in the classroom. He is only painting the front of the brick. The vertices of the face are (−4, 2), (−4, −11), (4, 2), and (4, −11). What is the area, in square inches, of the painted face of the brick?
A. 42 in2
B. 52 in2
C. 104 in2
D. 128 in2
Answers
Answer:
104in2
Step-by-step explanation:
The area, in square inches, of the painted face of the brick is Option C 104 \(in^{2}\).
Using the Quadrant system of the Number line
B (-4,2) lies in the 2nd quadrant.
C (-4,-11) lies in the 3rd quadrant
A (4,2) lies in the 1st quadrant
D (4,-11) lies in the 4th quadrant
Length of Side AB= Length of Side CD= Distance between x coordinate of A & B OR Between C & D i.e. 8 in
Length of Side BC= Length of side AD= Distance between y coordinate of A & D OR Between B & C i.e. 13 in
Area of the Square ABCD= (length of Side AB or CD) X (Length of Side BC or AD)
= (8 x 13) \(in^{2}\)
= 104 \(in^{2}\)
Thus, Area of square is 104 \(in^{2}\).
To learn more about area: https://brainly.com/question/25292087
the total number of spikes in the antlers of three male elks is 32. the oldest elk has four times as many spikes as the youngest elk. the second oldest elk has eight spikes more than the youngest elk. how many spikes does each elk have in their antler?
Answer as an X equation and find the X
Answers
Answer:
the oldest elk=4(x)
second oldest elk=x+8
youngest elk=x
total spikes=32
4x+x+8+x=32
6x+8=32
6x=32-8
6x/6=24/6
x=4.
the oldest elk =4(4)=16
Step-by-step explanation:
the youngest elk=4
the second oldest elk=4+8=12
16+4+12=32
What is the output value for the following function if the input value is 1?
y = 3 x + 1
5
32
0
4
Answers
Explanation: 3 times 1 is 3 so 3 plus 1 is 4. Y=4
Please help!
20+(5 x 2/5) + 3
Answers
Answer:
25.
Step-by-step explanation:
Whenever you attempt to solve an equation with multiple operations, remember this: PEMDAS
ParenthesisExponentiation (exponents)Multiplication/DivisionAddition/Subtraction**THIS IS THE ORDER IN WHICH YOU SHOULD SOLVE EQUATIONS WITH MULTIPLE OPERATIONS.**
First, we solve what is in parenthesis.
20+(5 x 2/5) + 3
5/1 x 2/5 = 10/5 = 2 (simplified)
Then, replace the equation with the answer.
20 + 2 + 3
Secondly, there are no exponents.
There is no multiplication nor division.
However, there is addition.
20 + 2 + 3
20 + 2 = 22
Now, we solve the remaining addition problem.
22 + 3 = 25.
Therefore, 20+(5 x 2/5) + 3 = 25.
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction
5*2/5=2
20+2+3
25
Could someone please help me on this question? I need help!!
Answers
Answer:
Step-by-step explanation:
do you think you could take a closer up one then I will help you.
Can someone please help
Answers
Answer:
I think the answer is c
Step-by-step explanation:
Sorry if i am wrong, also pleas give me Brainliest
Need answer as soon as possible please and thank you :)
Answers
Answer:
I got the answer!!
Step-by-step explanation:
\(\frac{1}{w^{6} }\) i hope this helps!!
Answer:
The simplified expression is 1/w^6.
Step-by-step explanation:
Using the product of powers exponent rule, we have
w^3 * w^(-9) = w^(3 + (-9)) = w^(-6).
However, the problem says to write the expression using only positive exponents. Here's an example of how to interpret negative exponents as positive exponents:
3^2 = 9
3^1 = 3
3^0 = 1
3^(-1) = 1/3
(and keeps on dividing by three onward)
Here, we see that 3^(-1) = 1/3^1.
Applying the same logic here, we have
w^(-6) = 1/w^6.
I hope this helps!
Hill
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LC33011
Question 13 of 34 ✓
Question 15
Identify the ordered pair that nameş point A.
-2
D
C
-1
2
Next Question
1
O
-1
-2
y
A
1
O A) (0.5, -1.5)
O B) (-1.5, 0.5)
O c) (-0.5, -1.5)
OD) (0.5, 1.5)
Answers
Which function has no x intercepts?
Exponential
Absolute value
Linear
Quadratic
Square rooot
Answers
Answer:
Square root. Hope this helps!!!
A group of 24 students spent 1,296 minutes studying for an upcoming test. What prediction can you make about the time it will take 150 students to study for the test?
It will take them 174 minutes.
It will take them 2,592 minutes.
It will take them 8,100 minutes.
It will take them 8,745 minutes.
Answers
Answer:
It will take them 8,100 minutes.
Step-by-step explanation:
If it takes a group of 24 students 1,296 minutes to study for an upcoming test, it takes 54 minutes for each student. (=> 1,296/24 = 54)
150 x 54 minutes = 8,100 minutes.
It will take them 8,100 minutes.
In ABC, m
In XYZ, m
Include in Your Answer:
What is m
What is m
Is it possible for these two triangles to be similar? Why or why not?
Answers
Answer:
Angle C= 79 degrees Angle X = 62 degrees
Step-by-step explanation:
Angle A= 62 degrees Angle B=39 degrees Angle C= ?
Angle X=? Angle Y= 39 degrees Angle Z= 79 degrees
Because both triangles share a similar angle (B and Y), meaning they are the same amount of degrees, triangle ABc and triangle XYZ could be similar, and if they are similar Angle X would equal the same as A and Angle C would equal the same as Z, Do you understand? if not message me and i could further explain!
Answer:
yes they are similar
Step-by-step explanation:
Angle C= 79 degrees Angle X = 62 degrees
A circle’s circumference is 600 m.
What is a good approximation of the circle’s area? 1. 300\ m^{2} 2. 3,000\ m^{2} 3. 30,000\ m^{2} 4. 300,000\ m^{2}
Answers
The area of the circle is approximately 30,000 \(m^{2}\)
The circumference of the circle is given as 600m.
And we know that circumference = \(2\pi r\) where r is the radius of the circle.
Therefore,
\(2\pi r = 600\)
\(r = \frac{600}{2\pi }\)
\(r = \frac{300}{\pi }\)
Now, we know that area of the circle = \(\pi r^{2}\)
Putting the value of r in this, we get
area = \(\pi (\frac{300}{\pi } )^{2}\)
area = \(\pi.\frac{300}{\pi } .\frac{300}{\pi }\)
Therefore, area of the circle = 28,647.889 \(m^{2}\)
Therefore, the correct answer is 30,000 \(m^{2}\)
To learn more about circle and it's area, refer to:
https://brainly.com/question/16125353
The number of people between the ages of 2 and 18 who accessed streaming media on the internet in November 1999 increased by 65% to about 7 million in November 2000. About how many people in this age group accessed streaming media in November 1999?
Plz Help!
Answers
Answer:
about 4,242,424 in the year of 1999
Step-by-step explanation:
Solve for x. 3x + 6 = 2x - 24
A) -30
B) -6
C) 6
D) 30
Answers
Answer:
A) -30
Step-by-step explanation:
3x + 6 = 2x - 24
x + 6 = -24
x = -30
Some students recorded how many minutes they spent on the phone in one day. They put the results in a Stem-and-Leaf Plot.
What is the mean number of minutes spent on the phone?
Answers
Explanation:
The data from the stem-and-leaf plot is:
10,
24,25,26,
30,30,32,33,
40,45,46
Add up those values
10+24+25+26+30+30+32+33+40+45+46 = 341
Then divide over n = 11 which is the sample size.
341/11 = 31 is the arithmetic mean.
Answer:
341/11 = 31 is the arithmetic mean.
Step-by-step explanation:
how many triangles can be constructed with the side lengths of 5 inches, 8 inches, and 20 inches
Answers
Answer:
No triangles
Step-by-step explanation:
The Triangle Inequality Theorem, states that the sum of the lengths of any two sides of a triangle is greater than the length of the third side
5+8 > 20 <-- is not true.
What is the surface area of the cylinder represented by the net? Apply the formula SA = 2B + Ph. Use π as part of your answer.
Answers
Answer:
128π
Step-by-step explanation:
SA = 2B + Ph = 2πR² + 2πRh = 2π.16 + 2π.4.12 = 128π
PLS ANSWER QUICKLY!!!
Answers
Answer:
I think it's 77 I'm not sure get back to me on it
65-(-12)=77
Kim’s score minus her sisters is 77 subtracting a positive and a negative it’s essentially adding
how to divide 3 ÷ 0.4 =
Answers
Answer:
7.5
Step-by-step explanation:
PLEASE HELP For what value of the variable will the value of 2x+1 be 20 greater than 8x+5?
Answers
It will be a negative.
for an example: -20 for x would mqke 2x + 1 into -39 and 8x + 5 into -155. that's 116 apart, so maybe -2(8) + 5 = -11
-2(2) + 1 = -3
but that's only 8 apart, so it'd be higher.
-4(2) + 1 = -7
-4(8) + 5 = -27
BOOM
Tadaaaa,
You probably thought positive, but sometimes it's negative, you know what I mean?
A net has a rectangle at the center and 4 triangles on the sides. The rectangle has a length (c) of 6 meters and height (b) of 2 meters. The triangle labeled a has a height of 6 meters.
Label the net by defining each variable.
a =
m
b =
m
c =
m
Answers
Answer:
Area of the rectangular pyramid is 82.8m²
Step-by-step explanation:
Number of rectangle = 1
Number of triangles = 4
Dimension of Rectangle = Length = 6 metres; Height = 2 metres
Dimension of 2 triangles: Base = 6 metres and Height = 8.8 metres
Dimension of other 2 triangles: Base = 2 metres and Height = 9 metres