A rectangle is inscribed with its base on the x-axis and its upper corners on the parabola. What are the dimensions of such a rectangle with the greatest possible area?.
The dimensions of the rectangle such that the rectangle have the greatest area is length = 8 and width = 4 .
In the question ,
it is given that ,
a rectangle is inscribed with its base on the x axis , and its upper corner on the parabola y = 12 − x² ,
let the coordinate of the upper right corner be P(x,y) ,
and A be the area of the rectangle .
the point P lies on the parabola , given y = 12 − x² ,
So, P = P(x,12−x²)
Due to symmetry of the rectangle, the width of rectangle is half the distance between P and the y axis ,
that means width = 2x and length = y .
Area of the rectangle = width × Length
= 2x * y
= 2x (12 − x²)
= 24x - 2x³
To maximize the area we differentiate Area with respect to x ,
we get ,
dA/dx = 24 - 6x²
for critical point dA/dx = 0 ,
24 - 6x² = 0
6x² = 24
x² = 4
x = ±2 ,
since length cannot be negative ,
So , x = 2 .
to check for maximum and minimum ,we differentiate Area with respect to x,
we get
d²A/dx² = -12x
substituting , x = 2 ,
we get -12 < 0, So , the area is maximum .
hence the width = 2*2 = 4
and length = 12 - 4 = 8
and the maximum area is 32 .
Therefore , The dimensions of the rectangle such that the rectangle have the greatest area is length = 8 and width = 4 .
The given question is incomplete , the complete question is
A rectangle is inscribed with its base on the x axis and its upper corners on the parabola y = 12 − x² . What are the dimensions of such a rectangle with the greatest possible area ?
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express the interval shown on the number line in inequality notation.
The given interval shown on the number line in inequality notation as (3, 6).
What are inequalities on a number line?
Inequalities on a number line allow us to visualise the values that are represented by an inequality.
To represent inequalities on a number line we show the range of numbers by drawing a straight line and indicating the end points with either an open circle or a closed circle.
An open circle shows it does not include the value.
A closed circle shows it does include the value.
The left endpoint is 3. The right endpoint is 6. Both endpoints are open holes, meaning we do not include them as part of the green shaded solution region. If x is a solution, then the solution can be described as
3 < X < 6 which converts to the interval notation (3, 6) . The curved parenthesis says "do not include the endpoint".
Note: this is not ordered pair notation (x,y).
The given interval shown on the number line in inequality notation as (3, 6).
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Yo! Please quickly help me solve this! Select the equivalent expression (2^5/x^2)^4
( Would give more points if I had more, but THANK YOU!! )
Answer:
(2⁵/x²)⁴
(32/X²)
32⁴+x⁶
1,048,576 + X⁶
Step-by-step explanation:
i don't know if this is right. this is all I know
Tori and her two best friends are all dressing up as superheroes for Halloween
this year. Their costumes are almost ready, but each person still needs to
make a cape. If each cape uses 4 feet of cloth, how many yards of cloth will
they use for the 3 capes?
Answer:
4×3=12
Step-by-step explanation:
that is the answer
One hundred people came to the company's Thanksgiving dinner. There were fifty-two more vegetarians at the dinner than non-vegetarians. How many vegetarians were at the dinner?
Answer:
76
Step-by-step explanation:
Let the number of vegetarians be x. Then, the number of non-vegetarians is x-52.
[tex]x+x-52=100 \\ \\ 2x=152 \\ \\ x=76[/tex]
Select all the equations equivalent to
6x9=12
a )2x + 3 = 4
B)0x + 9 = 6
C)6x + 12 = 9
D) 3= 2x + 4
E)3x + 9 = 6
F)6x=3
Equation which is equivalent to the given equation 6x + 9 = 12 is given by 2x + 3 = 4.
As given in the question,
Given equation is equal to :
6x + 9 = 12
Simplify by writing each number into prime factors of the given equation 6x + 9 =12 to get the equivalent equation,
( 2 × 3 )x + ( 3 × 3 ) = ( 2 × 2 × 3 )
3 is the common factor in all we get,
3 ( 2x + 3) = 3(4)
Divide by 3 both the side of the equation we get,
2x + 3 = 4
Therefore, equation which is equivalent to the given equation 6x + 9 = 12 is given by 2x + 3 = 4.
The complete question is:
Which equation is equivalent to the equation 6x + 9 = 12?
A. x +9=6
B. 2x + 3 = 4
C. 3x + 9 = 6
D. 6x + 12 = 9
E. 6x = 3
F. 3 = 2x + 4
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What combination of transformations is shown below?
reflection, then rotation
reflection, then translation
translation, then rotation
translation, then reflection
Answer:
translation, then rotation
Step-by-step explanation:
please help i need it ( look at picture)
Answer:
Plug all of the X values on the left of the table in to the equations one by one and calculate.
-2(-4)—5= 3
-2(-2)—5= -1
-2(0)—5= -5
-2(2)—5= -9
Step-by-step explanation:
Please help! I don’t understand what I need to do!
Answer:
Step-by-step explanation:
Math homework need asap pls
Step-by-step explanation:
function 1 :
simple, you put 3 into every place of x and then calculate.
y = -4×3 + 2 = -12 + 2 = -10
function 2 :
the only one where we need to think a little.
so, x = 3.
from the center of the coordinate axes we go on the x-axis to 3.
from there we go up out down to intersect the line. then we look to the left to the y-axis and see what value we have there : -1
y = -1 when x = 3
function 3 :
the solution is already written there in full sight.
input = 3.
so, we look in the table. where is the line with input = 3 ?
it is the last but one line. what value is in the output column of that line ? -3
output = -3
Consider the equation and its solution.
Negative 15 (x minus box) = 25. Negative 15 x + 30 = 25. Negative 15 x = negative 5. x = one-third.
What number should be in the empty box?
Answer:
Step-by-step explanation:15(x+2) =25
15x+30=25
15x=5
3x=1
x=1/3
Mrs. Jones put this extra credit problem on the board and asked to determine the missing
length of the side of this parallelogram. What answer should the students come to?
2x+10
5x- 20
4x-1
The length of the missing side is 39 units
What is parallelogram:The parallelogram is a simple 2D-shaped quadrilateral with two pairs of parallel sides. In a parallelogram, the opposite sides and opposite angles are equal.
Here we have,
The length of the sides of a parallelogram is 2x+10, 5x- 20 and 4x-1
As we know parallel lines of a Parallelogram are equal
Take any two sides as equal and find the missing side
Let the sides with lengths be equal 2x+10, 5x- 20
=> 2x+10 = 5x- 20
=> 5x - 2x = 20+ 10
=> 3x = 30
=> x = 10
Therefore, the lengths of the 3 sides are
2x+10 = 2(10) + 10 = 30
5x- 20 = 5(10) - 20 = 30
4x-1 = 4(10) - 1 = 40 - 1 = 39
The length of the missing side is 39 units
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A rental company charge $65a day and 20 cent a mile for renting a truck. Michael rented a truck for 3 day, and hi bill came to $275. How many mile did he drive?
A rental company charge $65 a day and 20 cent a mile for renting a truck. Michael rented a truck for 3 day, and he bill came to $275. He drive 400 mile.
In the given question we have to find how many mile did he drive.
From the given question, a rental company charge $65 a day and 20 cent a mile for renting a truck.
Michael rented a truck for 3 day, and he bill came to $275.
The rental company charges for three days renting
$(65×3)=$195
Also there is a expense of a mile for renting the truck is
20 cents =$0.20
Let Michel drove x miles in 3 days.
Therefore total bill in 3 days is $(0.20x+195).
According to the question,
0.20x+195 = 275
Subtract 195 on both side we get
0.20x = 80
Divide by 0.20 on both side we get
x = 400
Hence, he drive 400 mile.
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(0, 6), (0, -2)
I need help
Answer: The function that has these points is invalid because there can not be 2 different y-values in the same x-value.
the graph of a linear function is shown . which word describes the slope of the line
The slope of the line is 1/5 which is positive.
From the graph:
slope:
Slope is the steepness of a line as it moves from LEFT to RIGHT. Slope is the ratio of the rise, the vertical change, to the run, the horizontal change of a line. The slope of a line is always constant (it never changes) no matter what 2 points on the line you choose.
Take any points:
(0,0) and (5,1)
slope m = y2 - y1 / x2 -x1
= 1 - 0 / 5 - 0
= 1/5
Therefore the slope of the line is 1/5 which is positive.
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Can anyone help!!!!
Question 5 only *
Answer:
Step-by-step explanation:
-3x^2 + 24x + 5 in the form 5 (6x - 3)^2 + 18
6. Multi-Step Problem A fish swims 12 miles
downstream in 2 hours. The fish swims back
upstream to the same point, but the trip takes
3 hours. Assume the speed of the current was
constant and the fish swam along the same
path.
a. Write a system of linear equations to
describe the situation.
b. Determine the speed of the fish in still
water.
c. Determine the speed of the current.
d. Writing If the speed of the current was
not constant, could you still calculate the
speed of the fish in still water?
The speed of the fish in still water is 5 Km/h.
The speed of the current is 1 km/hr.
Write the definition of speed.The speed at which an object's location changes in any direction. The distance traveled in relation to the time it took to travel that distance is how speed is defined.For the given question.
Total distance travelled by fish = 12 miles.
Let the speed of the fish in still water be 'x km/h.'
Let the speed of the current be 'y km/hr'.
Time taken by fish in moving down steam is 2 hours.
Time taken by fish in moving up steam is 3 hours.
Use formula;
Distance = speed x time
Part a: system of linear equations
Down steam; 2(x + y) = 12 ...eq 1
Up steam; 3(x - y) = 12 ...eq 2
Part b: speed of the fish in still water.
Solve equation 1 an d 2 by elimination.
2(x + y) = 12
3(x - y) = 12
Divide equation 1 by 2 and multiply it by 3, Then add to eq 2.
6x = 30
x = 5
Speed of fish in still water = 5 Km/h.
Part c: speed of the current
Put value of x in eq 1.
x = 5
2y = 12 - 10
2y = 2
y = 1
Thus, speed of the current is 1 km/hr.
Part d: If the speed of the current is not constant than, then the value of speed of the fish in still water can not be found.
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Everyone loved Caroline’s cookies so much that they ate them all! She wants to make some more to eat at home, but would only like to make 1 dozen cookies. How much of each ingredient will she need? Rewrite the recipe so that it will only make 1 dozen cookies. Show your work
Original cookie recipe =
1 1/2 cups of peanut butter
1 cup of vegetable shortening
2 1/2 cups packed light brown sugar
6 tablespoons of milk
5 1/2 teaspoon vanilla extract
2 large eggs
3 cups of flour
1 1/2 teaspoon of baking soda
1/2 teaspoon of salt
The recipe that will only make 1 dozen cookies is as follows:
.18 cups of peanut butter
.12 cups of vegetable shortening
.30 cups packed light brown sugar
.72 tablespoons of milk
.66 teaspoon vanilla extract
.24 large eggs
.36 cups of flour
.18 teaspoons of baking soda
.6 teaspoons of salt.
What is a cookie recipe?This refers to the ingredients for baking a snack or dessert.
From the question:
Original cookie recipe =
1 1/2 cups of peanut butter
1 cup of vegetable shortening
2 1/2 cups packed light brown sugar
6 tablespoons of milk
5 1/2 teaspoon vanilla extract
2 large eggs
3 cups of flour
1 1/2 teaspoons of baking soda
1/2 teaspoon of salt
Note: 1 dozen= 12
The recipe that will only make 1 dozen cookies will be = Original cookie recipe * 12
1 1/2 cups of peanut butter * 12 =
3/2 *12= 18
1 cup of vegetable shortening *12
1 * 12 = 12
2 1/2 cups packed light brown sugar * 12
3/2 * 18 = 30
6 tablespoons of milk *12
6 * 12 = 72
5 1/2 teaspoon vanilla extract * 12
11/2 *12 = 66
2 large eggs * 12
2*12 = 24
3 cups of flour *12
3*12 = 36
1 1/2 teaspoons of baking soda * 12
3/2 *12 = 18
1/2 teaspoon of salt * 12
1/2 * 12= 6
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Suppose there is a 1.7 f drop in temperature for every thousand feet that an airplane climbs into the sky.If the temperature on the ground is 59.2,what will be the temperature when the plane reaches an altitude of 7,000 ft?
The temperature when the plane reaches an altitude of 7,000ft is 47.3 degree.
What is temperature?
Temperature, measure of hotness or coldness expressed in terms of any of several arbitrary scales and indicating the direction in which heat energy will spontaneously flow—i.e., from a hotter body (one at a higher temperature) to a colder body (one at a lower temperature).
Given,
there is temperature decrease in every thousand feet = 1.7f
temperature decrease in 7000 ft = 7(1.7) = 11.9 f
Therefore, temperature = 59.2- 11.9
=47.3
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Given that y varies directly as x, write an equation
for the relationship if y=-4 when x=10.
A) y=-4x+10
B) y=-0.4x
C) y=0.4x
D) y=-2.5x
Ivy's Lawn Care Service
# of
minutes
15
20
40
55
Cost
$37.50
$40.00
$50.00
$57.50
Slope:
Check
X
Y-intercept:
Check
Continue that pattern backwards to find the Y-
INTERCEPT (where x=0).
X
Hints:
Just pick any two of the points to find a pattern between
to solve for SLOPE (it doesn't matter which two)
Suggestion? Use the 20 and 40 points...cuz then you
can just count by 20's backwards to find the y-intercept.
A 132
40
1:15 PM
11/10/2022
A linear equation in two variable can be written in general form as y = mx + c. The slope and y-intercept are 1 / 2 and 30 respectively.
What is a Linear equation ?A linear equation is an equation having only one variable.
Its degree is one and it can be used to find the value of only one unknown quantity.
Suppose, the cost be y and the number of minutes be x.
Then, the slope from the given table can be found by by taking the ratio of the difference of cost and minutes from any two rows of the table as given below,
Slope = (50-40)/(40-20)
=> slope = 1/2
Now, the equation for the line representing the given table can be given as,
(y-40)/(x-20) = 1 / 2
=> y - 40 = 1 / 2 (x - 20)
=> y = x / 2 - 10 + 40
=> y = x / 2 + 30
The y-intercept is given at x = 0.
therefore y-intercept is given as,
y = 0 / 2 + 30
y = 30.
Hence, the slope is given as 1 / 2 and the y-intercept is 30.
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PLEASE HELP QUESTION IN PICTURE
Answer:
MN = 130
Step-by-step explanation:
since M is at the midpoint of LN , then
LM = MN
7x - 24 = 6x - 2 ( subtract 6x from both sides )
x - 24 = - 2 ( add 24 to both sides )
x = 22
Then
MN = 6x - 2 = 6(22) - 2 = 132 - 2 = 130
Mammoth Cave in Kentucky has a depth of −124.1 meters. Suppose a hiker traveled to the bottom of the cave. How many meters did the hiker descend?
Distance between starting and end point. The hiker descends the distance is [tex]124.1m[/tex]
What is depth?
The distance between the nearest end and farthest end of an object is its depth.
Here given that, the depth of the mammoth cave is [tex]-124.1m[/tex].
When the hiker is at the maximum depth it is traveling to the bottom of the cave.
As it is given the depth of the cave [tex]-124.1m[/tex]. Since the hiker is traveling down to the bottom and covering the total depth and the hiker must have covered the same distance corresponding to the depth in the cave which would be [tex]124.1m[/tex].
Hence, the hiker must have descended the distance that is [tex]124.1m[/tex]
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PLAY
Emma and Evie are saving for a new car. Emma has $2000 and she plans to save an additional $50 per month. Evie has $1600 and she plans to save an additional $100 per month. In how many months will Emma
and Evie have the same amount of money saved?
After 12 months for Emma and 10 months for Evie they will have the same amount of money that is $ 2,600
Given:
Case 1 : Amount of money Emma already has = $ 2000
Amount she plans to save per month = $ 50
Thus according to the above data after 12 months Emma would have
12 × 50 = 600 + 2000
this is equal to $ 2600
Case 2 : Amount of money Evie has = $ 1,600
Amount of money she plans to save every month = $ 100
Thus after 10 months she will have 10 multiplied by 100 which is $ 1000
Thus the total amount she will have = 1000 + 1600
which is equal to $ 2,600
Thus after 12 months for Emma and 10 months for Evie they will have the same amount of money that is $ 2,600
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using the ideal gas law, pv=nrt, what variable are we solving for in this investigation?
Using the ideal gas law, pv=nrt we can find the number of moles (n), pressure (P), volume (V), Kelvin (T).
The relationship between pressure (P), volume (V), amount of gas (n), and temperature (T) is represented by the ideal gas equation, PV=nRT (T). Because it assumes that gas is functioning in an ideal or theoretical way and can therefore be written as a universal gas constant, it is known as "the ideal gas law" (represented by R in the equation).
It is believed that the gas is perfect.
In many cases, pressure (P) is measured in atmospheres (atm). Liters are commonly used to measure volume (V) (L). Mole amounts (n) are frequently used as units of measurement (mol). The unit of temperature is Kelvin (T) (K).
R is the universal constant. The SI value is 8.31 J/mol∗K
The ideal gas law is helpful for comprehending and computing the characteristics and actions of gas, such as when developing cars or airplanes. It is also crucial for understanding thermodynamics. For instance, the pressure can be determined when the temperature, volume, and quantity of gas are known. When the variables are unknown, the ideal gas law equation can be changed to provide a solution for each one.
Hence by using the ideal gas law, pv=nrt compute the characteristics and actions of gas.
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i need help asap, i dont remember learning this so i have no clue
The different ways used to display misleading information on a graph is done by skipping a number or doesn't begin at zero. There are incorrect labels on the graph. Data is missing.
What is a misleading graph?A misleading graph also referred to as a distorted graph, is one that presents data inaccurately, abusing statistics in the process and potentially leading to an incorrect conclusion.
Sometimes deceptive graphs are created on purpose, and other times it's just a matter of people not comprehending the data that goes into the graph. The "classic" varieties of deceptive graphs include those in which:
The vertical scale does not begin at zero, is too large or too little, skips digits, or all of the above.
The graph's labels need to be updated.
Data is omitted.
Thus, the different ways used to display misleading information on a graph are done by skipping a number or doesn't begin at zero. There are incorrect labels on the graph. Data is missing.
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Need help please!
14. Write an equation of a line that is parallel to the line 2x – 3y = 6. Explain how you know that the graph of
your equation is parallel to 2x – 3y = 6.
15. A student drew the line y = 2x + 3
a. Write equations for two lines that are perpendicular to this line. Justify your answer.
b. What do you notice about the slopes of these two lines? What generalization can you make about two lines
that are both perpendicular to the same line?
Answer:
Step-by-step explanation:
14. y = -2/3x + 10. This is parallel to 2x -3y because they have the same slope.
15. y = -1/2x and y = -1/2x + 2. These are perpendicular because the slope is the opposite reciprocal to the slope of y = 2x + 3, which is 2.
The slopes of the lines of the 2 equations are the same. Because of that, we can state that 2 lines that are perpendicular to the same line are parallel. This can be further supported by the Perpendicular Transversal Theorem, which says the same thing.
Hope this helps!
Miss Jackson asked the 32 students in her tutor group which language they study.
Each student studies one language only.Half of the students in the tutor group study Spanish. Six more students study German than French. Find the values of French and German.
Answer:
French = 5 ; German = 11
Step-by-step explanation:
G + F = 16
G = 6 + F
6 + F + F = 16
6 + 2F = 16
2F = 16 - 6
2F = 10
2/2 F = 10/2
F = 5
G = 5 + 6 = 11
Factor each of the following.
x^3−8=0
Answer:
(x - 2)(x² + 2x + 4) = 0
Step-by-step explanation:
x³ - 8 ← is a difference of cubes and factors in general as
a³ - b³ = (a - b)(a² + ab + b²) , then
x³ - 8
= x³ - 2³
= (x - 2)(x² + 2x + 2²) = (x - 2)(x² + 2x + 4)
Find an equation of variation in which y varie inverely a x and y=5 and x=17. Then find the value of y when x=10
Answer: If the graph of a relationship is a line or a ray through the origin, then it is proportional. If it is a line or ray that does not pass through the origin, then it is not proportional. Also, if it is not linear, then it is not proportional.
Step-by-step explanation: