Answer:
I think it is 5
Step-by-step explanation:
first you add all of the data shown and then divide by 8
20 points to whoever answers this right!!
A shop has a sale that offers 20% off all prices.
On the final day they reduce all the sale prices by 25%.
Linz buys a radio on the final day.
Work out the OVERALL percentage reduction on the price of the radio.
Answer:
The overall percentage reduction on the price of the radio is 40% of its original price.
Step-by-step explanation:
If a price is reduced by 20%, then it becomes 80% of its original price, since 100% - 20% = 80%.
If the reduced price is then reduced by 25%, then it becomes 75% of its reduced price, since 100% - 25% = 75%.
Therefore, we need to find 75% of 80% and subtract this from 100% to determine the overall percentage reduction.
\(\begin{aligned}\implies 100\%-(75\%\; \textsf{of}\; 80\%)&=1-(0.75 \times 0.8)\\&=1-0.6\\&=0.4\\&=40\%\end{aligned}\)
Therefore, the overall percentage reduction on the price of the radio is 40% of its original price.
For example, if the original price of the radio is $150, then when it is reduced by 20% it costs $120. If it is then reduced again by 25% it costs $90. As $150 reduced by 40% is $90, this proves that the overall percentage reduction is 40%.
Look at this equation: 2 H2 + O2 --> 2 H2O. Why isn't there any coefficient in front of oxygen? HELP!!
A. A one is assumed when no coefficient is present.
B. There is an unlimited amount of oxygen
C. The 2 after the oxygen is all that is needed
D. All of these
Answer:
A:one is assumed when no coefficient is present
Step-by-step explanation:
seems right to me if in wrong im sorry :|
The table below shows the number of cups of food Trey's cat ate over time.
Number of cups: 3, 4, 9, 12, 15
number of days: 4, 8, 12, 16, 20
Which statement gives a unit rate?
A: For every day, Trey's cat ate 1.5 cups
B: For every cup, Trey's cat ate for 1.5 days
C: For every cup, Trey's cat ate for 0.75 of a day
D: For every day, Trey's cat ate 0.75 of a cup
Answer:
C
Step-by-step explanation:
Use complete sentences to describe why √-1 ≠ -√1
Well let's say that to compare these two numbers, we have to start with the definition first.
Definition
\( \displaystyle \large{ {y}^{2} = x} \\ \displaystyle \large{ y = \pm \sqrt{x} }\)
Looks like we can use any x-values right? Nope.
The value of x only applies to any positive real numbers for one reason.
As we know, any numbers time itself will result in positive. No matter the negative or positive.
Definition II
\( \displaystyle \large{ {a}^{2} = a \times a = |b| }\)
Where b is the result from a×a. Let's see an example.
Examples
\( \displaystyle \large{ {2}^{2} = 2 \times 2 = 4} \\ \displaystyle \large{ {( - 2)}^{2} = ( - 2) \times ( - 2) = | - 4| = 4}\)
So basically, their counterpart or opposite still gives same value.
Then you may have a question, where does √-1 come from?
It comes from this equation:
\( \displaystyle \large{ {y}^{2} = - 1}\)
When we solve the quadratic equation in this like form, we square both sides to get rid of the square.
\( \displaystyle \large{ \sqrt{ {y}^{2} } = \sqrt{ - 1} }\)
Then where does plus-minus come from? It comes from one of Absolute Value propety.
Absolute Value Property I
\( \displaystyle \large{ \sqrt{ {x}^{2} } = |x| }\)
Solving absolute value always gives the plus-minus. Therefore...
\( \displaystyle \large{ y = \pm \sqrt{ - 1} }\)
Then we have the square root of -1 in negative and positive. But something is not right.
As I said, any numbers time itself of numbers squared will only result in positive. So how does the equation of y^2 = -1 make sense? Simple, it doesn't.
Because why would any numbers squared result in negative? Therefore, √-1 does not exist in a real number system.
Then we have another number which is -√1. This one is simple.
It is one of the solution from the equation y^2 = 1.
\( \displaystyle \large{ {y}^{2} = 1} \\ \displaystyle \large{ \sqrt{ {y}^{2} } = \sqrt{1} } \\ \displaystyle \large{ y = \pm \sqrt{1} }\)
We ignore the +√1 but focus on -√1 instead. Of course, we know that numbers squared itself will result in positive. Since 1 is positive then we can say that these solutions exist in real number.
Conclusion
So what is the different? The different between two numbers is that √-1 does not exist in a real number system since any squared numbers only result in positive while -√1 is one of the solution from y^2 = 1 and exists in a real number system.
Answer:
Therefore \(\sqrt{1} \neq -\sqrt{1}\)
Step-by-step explanation:
\(\sqrt{-1} \\\) cannot be calculated as no two identical numbers that are multiplid could give -1. However - \(\sqrt{1}\) means -1 x \(\sqrt{1}\) = -1 x 1 = -1 . Therefore \(\sqrt{1} \neq -\sqrt{1}\)
In a cheerleading competition, each team receives scores in eight categories. One team has an average score of 7.25 in the eight categories. Write a division equation in the "Show Your Work" box and then solve algebraically to find the team’s total score s. Place your final answer in the space provided.
The total teams score in competition are 58.
Based on the condition, the solution to find the total teams score:
- Given the identify of variables:
Mean Score: 7.25/team
Categories : 8
Total team score: s
- Formulated the variables become equation properly:
s = Mean score x Categories
s = 7.25 x 8
s = 58
- Hence, The total teams score in competition are 58.
Equation
Equation refers to a mathematical expression containing the equals sign. Algebra is frequently used in equations. In mathematics, algebra is employed when the exact value of a calculation cannot be determined.
An equation is merely a numerical statement that can substitute a variable for an unknown value. A variable is a letter that is used to represent an unknown value. It can be any letter, although the letter x is the most common.
All formulas are equations. Some equations are not formulas. Equations are intended to be solved for a certain variable.
The variable of this problem is mean score, categories and total score. From this variable, identify each function to find the equation then the result.
An image of a rhombus is shown.
a rhombus with a base of 18 centimeters and a height of 15.5 centimeters
What is the area of the rhombus?
16.75 cm2
33.5 cm2
139.5 cm2
279 cm2
Formula used,
Area of rhombus = Base × height
Substituting the values,
\( \longrightarrow\)Area = 18 × 15.5
\( \longrightarrow\) Area = 279 cm²
Therefore, 279 cm² is the area of the rhombus .
Answer:
D) 279 cm²
Step-by-step explanation:
Area of a rhombus formula:
\(A=bh\)
This formula is also used for squares and rectangles.
So, we can substitute in our values such as:
A=(18)(15.5)
simplify
A=279
Now, add our label and units:
A=279 cm²
Hope this helps! :)
Can y’all help? Image provided
Answer:
Welll, of you know the # of the servings, then u can divide it into 5 parts. just ge the # of servings ÷ 5
Which rational number is one tick mark to the right of Negative StartFraction 6 Over 4 EndFraction on the number line below?
A number line going from negative 2 to positive 2 in increments of 1. There are 4 equal spaces between each number.
Negative one and three-fourths
Negative 1 and one-fourth
1 and one-fourth
1 and three-fourths
Answer:
B>-1 1/4
Step-by-step explanation:
The rational number is one tick mark to the right of -6/4 is \(-1\frac{1}{4}\).
What is number line?A straight line of numbers is shown visually as a number line. This line is used to compare integers on an endless line that extends on both sides, either horizontally or vertically, at equal intervals. On a horizontal number line, the numbers grow as we walk to the right and decrease as we move to the left.
Given the number -6/4,
if we go right of -6/4 it is moving towards -1
the points right to -6/4 are -5/4, -4/4,....
the next point right of -6/4 is -5/4
the mixed form of -5/4 is \(-1\frac{1}{4}\).
Hence option B is correct.
Learn more about number line;
https://brainly.com/question/13425491
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The measure of z (4x-5) if x=7 find the measure of z then classfiy then angle
Answer:
x=2
Step-by-step explanation:
...........................................
Mio is on the running team. She runs 4 laps in 6 minutes.
At this rate, how long will it take for her to run 15 laps? ____ minutes
HELPPP
The question is on a screenshot.
Answer: it is false, it is 36
Step-by-step explanation:
Answer:
False
Step-by-step explanation:
If each circle represents 12 and there are 2 and a half circles than the value would not be 32 it would be 12*2.5 or 30.
The table shows the balances of two bank accounts for 3 months. In what month will the balance of Account A be equal to the balance of Account B? I have a pic below
7-6: Practice Buddy: Independent Practice; Problem Solving help please!
Answer:
22 14/35
soo 22 as a whole number and the fraction 14/35
Use the information to answer the WILL GIVE BRAINLIEST!! question.
The picture shows two sections of Mrs. Jones's art supply drawer.
Paints
Brushes
10 in.
8 in.
6 in.
3 in.
What is the total area of both sections of the drawer? Enter the answer in the box.
square inches
Answer : Add Both Together And You Get = 84
Brushes : 8 * 3 = 24
Paints : 10 * 6 = 60
answer plz
and god bless you
Answer:
3(1+7)
Step-by-step explanation:
Which equation represents a non-proportional relationship?
y = 3x + 5
y = −3x
y = 3x + 0
y = 13x
Find the value of f(-5).
==========================================================
Explanation:
Locate -5 on the x axis number line. Draw an arrow going upward until you reach the function curve. Then move horizontally until you reach the y axis. You should arrive at y = 4. Therefore, f(-5) = 4 and it means the point (-5, 4) is on the function curve.
Check out the diagram below.
A restaurant serves you a 16-fluid ounce glass of juice that is 30% ice. How many fluid ounces of juice do you actually get? Show all of your work
At a recent football game of 8,450 in attendance, 150 people were asked what they prefer on a hot dog. The results are shown.
Ketchup Relish Chili
54 36 60
Based on the data in this sample, how many of the people in attendance would prefer ketchup on a hot dog?
4,225
3,380
3,127
3,042
By proportion that is:(54/150) * 8450= 54 * 56 1/3= 3042
Answer:
By proportion that is:(54/150) * 8450= 54 * 56 1/3= 3042
Step-by-step explanation:
Can Someone Help Me Please? I am offering 100 points!
Geraldine is graphing the inequality x less-than 6. Which statements below describe steps she may take to graph the inequality correctly? Check all that apply.
Draw an open circle at 6.
Draw a closed circle at 6.
Shade all numbers less than 6.
Shade all numbers greater than 6.
Shade all numbers to the right of 6.
Shade all numbers to the left of 6.
Answer:
shade all numbers less than 6
shade all numbers to the left of 6
Step-by-step explanation:
i believe this is the answer because if you graph x<6, you can see that the shaded area is to the left of 6 (numbers less than 6).
Desmos graphing calculator helps
Answer:
3, & 6
Step-by-step explanation:
PLEASE DO NOT ANSWER THIS EMPTY OR ADD A LINK OR SAY "Answer is in here!" I WILL REPORT YOU IF YOU DO. I DO NOT TAKE FILES PLEASE PLEASE PLASE.
Answer:
B
M=2
Step-by-step explanation:
rise over run
you rise 2 and go over 1
2 over 1 is just 2.
Answer:
I think the answer(s) are m = -3 and/or m = 1.5 because they both hit the lines.
(sorry if I'm wrong or this wasn't helpful)
Step-by-step explanation:
Three ways to find the slope of a line:
1. You may have two points ( x 1 , y 1 ) and ( x 2 , y 2 ) (often one or both of these points may be intercepts of the x and/or y axes). The slope is given by the equation
y 2 − y 1 \(\frac{}{}\)
m = -------------- (<- that's supposed to be a fraction btw)
x 2 − x 1
2. You may have a linear equation that is either in the form or can be manipulated into the form
y = m x + b .
In this case the slope is m (the coefficient of x ).
3. If the line is a tangent to another function, you may have (or be able to determine) the slope of the tangent as the derivative of the function. Normally in this case the derivative is a function expressed in terms of x and you need to substitute the value of x into this function for the required location.
<3 Enjoy,
Dea
Help!!!!
Mrs. Jones wants to paint the back wall of her classroom light blue. If the dimensions of the wall is 20 feet by 12 feet, how much paint will she need to paint her classroom wall? Round to the nearest tenth if necessary.
Answer:
The total area of the back classroom wall is (20ft x 12ft) = 240ft²
The paint coverage is usually rated by area coverage. For example, one gallon of paint is expected to cover 400 ft².
Assuming a gallon of paint will cover 400ft², she will need (240ft²/400ft²) = 0.6 gallon of paint to cover the entire wall.
Mrs. Jones will need 0.6 gallon of paint to paint the back classroom wall.
what property name is 5+8+m=5+m+8
Answer:
commutative property
Step-by-step explanation:
commutative property is when you can flip the variables and numbers in the equation
PLEASE HELP
Item 7
James deposits $12,000 into each of two savings accounts.
Account I earns 2.2% interest compounded annually.
Account II earns 2.2% annual simple interest.
There are no additional deposits or withdrawals.
What is the sum of the balances of these accounts at the end of 7 years?
$27,168.00
$27,696.00
$27,822.53
$27,949.08
Answer:
Step-by-step explanation:
x/12,000=2.2/100 so you multiply 12,000x2.2=26,400
then you divide 26,400 by the other 2.2=12,000
then u add 12,000+26,400=38,400
i think i messed up i would think it would be 27,822.53 but im not sure
The sum of the balances of these accounts at the end of 7 years is $27,822.54.
What is the sum of the balances of these accounts at the end of 7 years?The balance in each account would be determined and added together.
The formula that can be used to determine the balance in the account that is compounded annually is:
FV = P (1 + r) nm
FV = Future value
P = Present value
R = interest rate
m = number of compounding
N = number of years
12,000 (1.022)^7 = $13,974.54
The formula that can be used to determine the balance in the account that earns a simple interest is: amount deposited + (amount deposited x time x interest rate)
12,000 = (12,000 x 0..022 x 7) = $13,848
$13,848 + $13,974.54 = $27,822.54
To learn more about future value, please check: https://brainly.com/question/18760477
Which scenario can be modeled by the linear function
y = -15x + 500?
A. The temperature on Jupiter is
15℉ and increases by 500℉ every day.
B. There is a population of 500 giraffes in Western Africa that decreases by 15 giraffes each year.
C. A carpet cleaning service charges $500 plus an additional $15 for every hour.
D. A membership fee for a movie streaming service is free, but each rental costs $15.
help-
(please, ill mark brainliest)
Answer:
a
Step-by-step explanation:
Ayo, what's your opinion on blue haired girls?
If it’s full blue hair nah I don’t like it but if it’s like highlights it’s cool
1. Twelve large bottles of water cost $9.
How many bottles can you buy for $3?
What is the cost per bottle of water
How much would 7 bottles of water cost?
------------------------------------------------------
2.A 10-pound sack of flour costs $8.
How much does 40 pounds of flour cost?
What is the cost per pound of flour?
-------------------------------------------------------
3. Four bags of chips cost $6.
What is the cost per bag?
At this rate, how much will 7 bags of chips cost?
-----------------------------------------------------------------------
4. At a used book sale, 5 books cost $15.
What is the cost per book?
At this rate, how many books can you buy for $21?
-------------------------------------------------------------------------
5. Neon bracelets cost $1 for 4.
What is the cost per bracelet?
At this rate, how much will 11 neon bracelets cost?
Answer:1. $3- 4 bottles, 1 bottle = 4/3 , 7 bottles= 28/3
2. 40 pounds=$32, 1 pound= $8/10
3. Per bag= 3/2, 7bags= 21/2
4. Per book = $3, 21 books= $63
5. Per bracelet = 0.25 cents, 11 bracelets = 2 dollars 75 cents
Step-by-step explanation:
Can someone help me please. i will give lots of points
Answer:
Step-by-step explanation:
B, Mrs web
Answer:
B) 60%
Step-by-step explanation:
Percentage formula
\(\sf Percentage=\left(\dfrac{Value}{Total\:value}\right) \times 100\)
To find what percent of 200 is 120, substitute the values into the percentage formula:
\(\begin{aligned}\implies \sf Percentage & = \dfrac{120}{200} \times 100\\\\&=\dfrac{120 \times 100}{200}\\\\&=\dfrac{12000}{200}\\\\&=\dfrac{120}{2}\\\\&=60\%\end{aligned}\)
Therefore, 120 is 60% of 200.