Final answer:
The statement that the sum of two linear expressions is always a linear expression is correct, due to properties such as additivity and commutativity. Adding like terms and constants of two linear expressions together will yield another linear expression. This principle applies to linear equations and functions as well.
Explanation:
Your friend's assertion that the sum of two linear expressions is always a linear expression is correct. A linear expression is generally of the form αx + β, where α and β are constants and x is the variable. When adding two linear expressions, say αx + β and γx + δ, the result is (α+γ)x + (β+δ), which is also a linear expression. This is due to the additive property, which states that like terms can be added and constants can be added separately. Also, considering the commutative property of addition, which implies A+B = B+A, we can see that the order of addition does not affect the linearity of the expression.
Examples or specific cases also illustrate this concept. For instance, if one linear expression is 3x + 2 and the other is 5x + 4, adding them together yields (3+5)x + (2+4), which simplifies to 8x + 6, clearly a linear expression. The linear nature of the sum is further illuminated by considering functions or equations that involve only constants. If one function equals a constant and another equals a constant, their sum is also constant, preserving linearity.
In the context of linear differential equations, the principle that linear combinations of solutions are also solutions applies. This means that if we have two functions that are solutions to a linear differential equation, their sum (a linear combination) will also be a solution to the same linear differential equation. This indicates that linearity is preserved when combining linear items, whether they are expressions, functions, or equations.
help me with THIS HOME WORK
find the product 0.9×079=
Answer is 71.1 because 0.9 x 079 in a calculator is 71.1
Jakes batting average for softball season is 0.368 what is Jake’s batting average written in expanded form
Here you go the answers below
What is the area of the polygon given below?
Look at picture
The answer is B. 525 square units.
The polygon pictured is a composite figure made up of several rectangles. To find the total area, we can find the area of each of the rectangles and sum them together.
From the image we can find the following areas:
Top left rectangle: 9 square units
Top right rectangle: 14 x 3 = 42 square units
Bottom left rectangle: 7 x 14 = 98 square units
Bottom right rectangle: 27 square units
Summing the areas of each rectangle together gives us a total area of 9 + 42 + 98 + 27 = 176 square units.
However the prompt specifies that this is not the total area. There is a small square removed from the bottom left rectangle. We can find the area of this square by subtracting the length of the small rectangle’s missing side (3 units) from the length of the whole rectangle’s side (14 units) and squaring the result. Subtracting 3 from 14 gives us 11 and squaring 11 gives us 121.
So the final area of the polygon is 176 - 121 = 55 square units.
Of the answer choices provided, only 55 square units matches our calculation. So the answer is B. 525 square units.
At a summertime poolside snack bar, 200 ice cream scoops were sold in one day. Double scoops were sold for $1.25 each and single scoops were sold for $1 each. If the proceeds from the sale of the cones were $221.75, how many of each kinds of cone were sold? In all, how many scoops of ice cream were sold?
Answer:
a) 87 double scoops and 113 single scoops.
b) 287 scoops of ice cream.
Step-by-step explanation:
1. You need to make a system of equations, where double scoops are represented by [tex]x[/tex] and the single scoops are represented by [tex]y[/tex]:
[tex]\left \{ {{x+y=200} \atop {1.25x+y=221.75}} \right.[/tex]
2. You can apply the Elimination Method:
- Multiply the first equation by -1 to cancel the variable [tex]y[/tex] from the system. Add both equations:
[tex]0.25x=21.75[/tex]
- Solve for [tex]x[/tex]:
[tex]x=\frac{21.75}{0.25}\\x=87[/tex]
- Substitute the value of [tex]x[/tex] into one of the original equations and solve for [tex]y[/tex]:
[tex]87+y=200\\y=113[/tex]
3. You can calculate the total number of scoops of ice cream that where sold as below:
[tex]2x+y[/tex]
4. Substitute values:
[tex]2(87)+113=287[/tex] scoops of ice cream
Answer: The number of single scoop cones sold is 113, number of double scoop cones is 87 and the total number of cones sold is 287.
Step-by-step explanation: Given that at a a summertime poolside snack bar, 200 ice cream scoops were sold in one day.
Double scoops were sold for $1.25 each and single scoops were sold for $1 each. The proceeds from the sale of the cones were $221.75.
We are to find the number of single scoop cones, double scoop cones and the number of scoops of ice cream that sold.
We Let x and y represents the number of cones of single scoop and double scoop ice cream that sold.
Then, according to the given information, we have
[tex]x+y=200\\\\\Rightarrow x=200-2y~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)[/tex]
and
[tex]1\times x+1.25y=221.75\\\\\Rightarrow x=221.75-1.25y~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(ii)[/tex]
Comparing equations (i) and (ii), we get
[tex]200-y=221.75-1.25y\\\\\Rightarrow 1.25y-y=221.75-200\\\\\Rightarrow 0.25y=21.75\\\\\Rightarrow y=\dfrac{21.75}{0.25}\\\\\Rightarrow y=87.[/tex]
From equation (i), we get
[tex]x=200-87=113.[/tex]
Therefore, total number of scoops that were sold is
[tex]113+2\times87=113+174=287.[/tex]
Thus, the number of single scoop cones sold is 113, number of double scoop cones is 87 and the total number of cones sold is 287.
Which point is on the graph of f(x)=3x5^x?
By substituting x=1 into the function f(x)=3x5^x, we find that the point (1,15) is on the graph.
To find a point that lies on this graph, we can select a value for x, substitute it into the function, and calculate the corresponding y value. Let's try x=1:
f(1) = 3(1)51 = 3(5) = 15.
Therefore, the point (1,15) is on the graph of f(x)=3x5^x.
identify the initial amount,a,and the growth factor,b,in each exponential function.Break b into (1+r)where r is the rate of growth. Give r as a percentage. y=1.05(1.46)^x
Given function : [tex]y=1.05(1.46)^x[/tex]
We need to identify a " initial amount", b "growth factor", r " rate of growth".
We know, exponential growth formula
[tex]y=a(b)^x[/tex], where a is initial amount, b is growth factor. On comparing with given function let us find values of a and b.
[tex]y=1.05(1.46)^x[/tex] ⇔ [tex]y=a(b)^x[/tex].
We can see a= 1.05 and b = 1.46.
Now, b=1+r.
Therefore, 1+r =1.46.
Subtracting 1 from both sides, we get
1+r-1 =1.46-1
r = 0.46.
On converting 0.46 into percentage, we get
0.46 × 100 = 46.
Therefore, intial amount a = a= 1.05 , growth factor b = 1.46, and the rate of growth r= 46%.
Final answer:
The initial amount, a, is 1.05, and the growth factor, b, is 1.46 in the exponential function y=1.05(1.46)ˣ. The growth rate, r, when expressed as (1+r), is 46%.
Explanation:
To identify the initial amount a and the growth factor b in the exponential function y=1.05(1.46)ˣ, we look at the standard form of an exponential function, which is y=a×bˣ. Comparing this with the given function, we can see that the initial amount a is 1.05 and the growth factor b is 1.46.
To express the growth factor in the form of (1+r), where r is the rate of growth, we can set b = 1 + r. This means that r would be b - 1, which is 1.46 - 1 = 0.46. To express r as a percentage, we multiply by 100, resulting in a growth rate of 46%.
If length of one side of cube is 20 cm, then volume of cube must be...
A: 4000 cm 3
B: 6000 cm 3
C: 800 cm 3
D: 8000 cm 3
D
the volume (V ) of a cube = s³ ( where s is the length of the side )
here s = 20, hence
V = 20³ = 8000 cm³
Zoe has 1500 beads. She wants to make 6 friendship bracelets. She needs 215 beads for each bracelet. How many beads will Zoe have left after making all six of the bracelets? explain
Zoe will have 210 beads left after making all six of the friendship bracelets.
Explanation:Zoe has 1500 beads and wants to make 6 friendship bracelets, with 215 beads needed for each bracelet. To find the total number of beads needed for all the bracelets, multiply the beads required for one bracelet (215) by the number of bracelets (6). This equals 1290 beads. To find the number of beads Zoe will have left after making all the bracelets, subtract the total number of beads needed (1290) from the initial number of beads (1500). Therefore, Zoe will have 210 beads left.
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What is 15-5(4x-7)=50
Simplifying
15 + -5(4x + -7) = 50
Reorder the terms:
15 + -5(-7 + 4x) = 50
15 + (-7 * -5 + 4x * -5) = 50
15 + (35 + -20x) = 50
Combine like terms: 15 + 35 = 50
50 + -20x = 50
Add '-50' to each side of the equation.
50 + -50 + -20x = 50 + -50
Combine like terms: 50 + -50 = 0
0 + -20x = 50 + -50
-20x = 50 + -50
Combine like terms: 50 + -50 = 0
-20x = 0
Solving
-20x = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Divide each side by '-20'.
x = 0.0
Simplifying
x = 0.0
20x^2-30=4x solve for x
Answer:
x=1.3288 or -1.1288
Step-by-step explanation:
Given [tex]20x^{2}-30=4x[/tex]
Subtract 4x from both sides
[tex]20x^{2}-4x-30=0[/tex]
Since we can factor out 2 from whole equation, let's factor out 2.
[tex]2(10x^{2}-2x-15)=0[/tex]
Divide with 2 on both sides
[tex]10x^{2}-2x-15=0[/tex]
We got the quadratic equation, we can solve for x using quadratic formula.
[tex]x=\frac{-b\pm\sqrt{b^{2}-4ac} } {2a}[/tex]
[tex]x=\frac{2\pm\sqrt{2^{2}-4X10X(-15)} } {2X10}[/tex]
[tex]x=\frac{2\pm\sqrt{604} }{20}[/tex]
[tex]x=\frac{2\pm2\sqrt{151}}{20}[/tex]
[tex]x=1.3288or-1.1288[/tex]
5 consecutive integers whose sum is -155
Answer:
-29, -30, -31, -32, -33
Step-by-step explanation:
add them together
oint) Solve the following inequality. Enter the answer in interval notation. 10x - 5 < -10(8x - 2)+3 Answer: Note: If the answer includes more than one interval, write the intervals separated by the "union" symbol, U. If needed, enter \infty as infinity and -\infty as -infinity.
The temperature on a summer afternoon is 85°F. Define a variable and write an expression to find the temperature after it changes. Then evaluate your expression for a decrease of 11 degrees Fahrenheit.
11 – c; 11 – (–85) = 74; 74°F
85 – c; 85 – (–11) = 96; 96°F
85 + c; 85 + (–11) = 74; 74°F
11 + c; 11 + (–85) = 96; 96°F
B.) Any temperature change is the original temperature plus the numerical value of the change. (temp + change) If it is an increase, the number will be positive. If it is a decrease, the number will be negative.
Since there is a decrease of 11, c would be replaced with -11. When you plug this into your expression (85 + c: 85 + -11), the answer to this would be 74.
hope it helps
Final answer:
Explaining how to define a variable, write an expression, and evaluate the temperature after a decrease in Fahrenheit degrees.
Explanation:
Variable: Let c represent the temperature change.
Expression: To find the new temperature after a decrease of 11°F, the expression is 85 - c.
Evaluation: By substituting c with -11 (decrease of 11°F), 85 - (-11) equals 96°F.
A report prepared by a credit bureau which shows details of an individual’s credit history is a _____.
The answer is Credit Report
Answer:
Credit Report fellas!
Step-by-step explanation:
Solve for a: 3a+4bc-d=5a-8j
3a + 4bc - d = 5a - 8j
Add d to both sides.
3a + 4bc = 5a - 8j + d
Subtract 4bc from each side.
3a = 5a - 8j + d - 4bc
Subtract 5a from both sides.
-2a = -8j + d - 4bc
Divide both sides by -2
a = [tex]\frac{(-8j -4bc + d)}{-2}[/tex]
A=2bc+-1/2d+4j would be your answer
Please help me with this
The perimeter of the rectangle:
[tex]P_R=2(4x+2+2x)=2(6x+2)=(2)(6x)+(2)(2)=12x+4[/tex]
The perimeter of the square:
[tex]P_S=2(5x-3+3x+1)=2(8x-2)=(2)(8x)+(2)(-2)=16x-4[/tex]
The perimeter of the rectangle is equal to the perimeter of the square. We have the equation:
[tex]12x+4=16x-4\qquad|\text{subtract 4 from both sides}\\\\12x=16x-8\qquad|\text{subtract 16x from both sides}\\\\-4x=-8\qquad|\text{divide both sides by (-4)}\\\\x=2[/tex]
The side lengths of the square:
[tex]5x-3\to5(2)-3=10-3=7[/tex]
The side lenghts of the rectangle:
[tex]4x+2\to4(2)+2=8+2=10\\2x\to2(2)=4[/tex]
Other method.
If the first figure is a square, then the length of the sides are equal.
Therefore
[tex]5x-3=3x+1\qquad|\text{add 3 to both sides}\\\\5x=3x+4\qquad|\text{subtract 3x from both sides}\\\\2x=4\qquad|\text{divide both sides by 2}\\\\x=2[/tex]
Further part of the solution as above.
Find the number that makes the ratio equivalent to 2:8.
A ratio is used to describe how two or more quantities are related. For example, we might say that a fruit drink calls for sugar crystals to be mixed with water in a ratio of 2:8. This means that for every 2 scoops sugar crystals, there will need to be 8 ounces of water. If there were 200 scoops of sugar crystals, there would need to be 800 ounces of water.
Sure, we'll start off by simplifying the ratio 2:8. Simplifying it gives us 1:4.
Our aim is to find a number, let's denote it by x, such that the ratio 2:x will be the same as 1:4.
To find such an x, we need to set up an equation using the principle of equivalence of ratios. This gives us 2/x = 1/4.
Now we proceed to solve this equation for x. We do this by cross-multiplying the fractions in the equation.
Cross-multiplication gives us 2*4 = x*1. Simplifying this yields 8 = x.
Hence, we can conclude that the number x that makes the ratio 2:x equivalent to 2:8 is 8.
what is -x+y=6 in funtion form
4²+7²+...+(3n+1)²=S, what is S?
[tex]\displaystyle\\4^2+7^2+\ldots+(3n+1)^2=\\\\\sum_{k=1}^n(3k+1)^2=\\\\\sum_{k=1}^n(9k^2+6k+1)=\\\\\sum_{k=1}^n9k^2+\sum_{k=1}^n 6k+\sum_{k=1}^n1=\\\\9\sum_{k=1}^nk^2+6\sum_{k=1}^n k+n=\\\\9\left(\dfrac{n(n+1)(2n+1)}{6}\right)+6\left(\dfrac{n(n+1)}{2}\right)+n=\\\\\dfrac{3n(n+1)(2n+1)}{2}+3n(n+1)+n=\\\\\dfrac{3n(2n^2+n+2n+1)}{2}+3n^2+3n+n=\\\\\dfrac{3n(2n^2+3n+1)}{2}+3n^2+4n=\\\\\dfrac{6n^3+9n^2+3n}{2}+\dfrac{6n^2+8n}{2}=\\\\\dfrac{6n^3+15n^2+11n}{2}[/tex]
idk what to do help me pls
helppppppp with???????
For each pair of polygons, describe the transformation that could be applied to Polygon A to get Polygon B
These are the polygons
The transformation of Polygon A to Polygon B could involve translation, rotation, or reflection. Observe differences in position and orientation between the two polygons to identify the type of transformation.
Explanation:The transformation of a polygon to another can involve a series of moves such as translation (sliding), rotation (turning around a point), or reflection (flipping over a line). By closely comparing the two polyhgons A and B, you can determine which type of transformation has taken place.
For instance, if every point on polygon A has moved in the same direction and distance to form polygon B, a translation has taken place. If polygon B can be obtained by turning polygon A around a point, then a rotation has occurred. If polygon B is a mirror image of polygon A, then it has been reflected.
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What is the distance between...
what do you mean ¨ what is the distance between¨ what is the rest of the question?
Answe and work to both!!!!!
Answer:
1. The fixed costs is $40 and the cost per mile is [tex]\$\frac{3}{2}[/tex].
2.Therefore, the coffees did they sell is, 85 coffees
Step-by-step explanation:
1. To find the fixed cost and Cost per mile.
Since, a shipping company charges a fixed amount for their services and a certain amount per mile , they must travel.
Let the number of fixed amount be x and the certain amount per mile be y
then, the general linear equation for this we have:
[tex]x+y=C[/tex] where C is the charges cost by the shipping company.
It is given that for a 50 mile trip company costs $115 and an 80 mile trip costs $157.
we have an equation in linear form from the above data:
[tex]x+50y=\$115[/tex] .....(1)
[tex]x+80y=\$157[/tex] ....(2)
Now, solving these equation simultaneously we get,
[tex]y=\frac{3}{2}[/tex]
Substitute the value of y in equation (1),
[tex]x+50\times\frac{3}{2}=\$115[/tex]
[tex]x+75=\$ 115[/tex]
⇒[tex]x=\$40[/tex]
Therefore, the fixed costs is $40 and the cost per mile is [tex]\$\frac{3}{2}[/tex].
2.
Let the hot chocolate sells be x and that of coffee be y.
At one game they sold, $200 worth of drinks and used 295 cups. if hot chocolate sells for $0.75 and coffee sell for $0.50.
An equation from the given condition are given by:
[tex]x+y=295[/tex]
[tex]0.75x+0.50y=200[/tex]
Solving these equation simultaneously we get the value of y=85
Therefore, the coffees did they sell is, 85 coffees
Little Melinda has nickels and quarters in her bank. She has two
fewer nickels than quarters. She has $3.50
in the bank. How many coins of each type does she have?
How many quarters does she have?
A) N +2 = Q which equals
A) N -Q = -2
B) .05N +.25Q = 3.50 multiplying A) by .25
A) .25N -.25Q = -.5 then adding A) and B)
.30N = 3
Nickels = 10 Quarters = 12
*************DOUBLE CHECK ***************
.05 nickels = $0.50 .25 Quarters = $3.00
Melinda has 12 quarters and 10 nickels in her bank, totaling $3.50. By setting up and solving equations based on the values of the coins, we were able to determine the exact number of each type of coin.
Explanation:Little Melinda has nickels and quarters in her bank, with two fewer nickels than quarters. The total amount of money she has is $3.50. To determine how many coins of each type she has, we need to set up equations based on the values of the coins and the given conditions.
Let's define:
Q = number of quarters
N = number of nickels
Since each quarter is worth 25 cents and each nickel is worth 5 cents, we have the following equations:
1. N = Q - 2 (since she has two fewer nickels than quarters)
2. (5 × N) + (25 × Q) = 350 cents (because the total amount is $3.50)
Substitute the first equation into the second to find the number of each coin:
5(Q - 2) + 25Q = 350
5Q - 10 + 25Q = 350
30Q - 10 = 350
30Q = 360
Q = 12
Then, substitute Q = 12 into the first equation to find N:
N = 12 - 2
N = 10
Therefore, Melinda has 12 quarters and 10 nickels.
Find the distance CD rounded to the nearest tenth.
C=(5,6) and D (2,2)
CD=
Use the distance formula to find the distance between points C (5,6) and D (2,2).
d=[tex]\sqrt{(x2-x1)^2+(y2-y1)^2}[/tex]
Plug the corresponding values in to the equation.
d=[tex]\sqrt{(2-5)^2+(2-6)^2}[/tex]
Then simplify the rest of the equation.
d=[tex]\sqrt{(-3)^2+(-4)^2}[/tex]
d=[tex]\sqrt{9+16}[/tex]
d=[tex]\sqrt{25}[/tex]
d=[tex]5[/tex]
The distance of the two points CD is 5.
To find the distance between point C=(5,6) and point D=(2,2), we use the distance formula which results in d=5.0 units rounded to the nearest tenth.
To calculate the distance between point C and point D, we use the distance formula derived from the Pythagorean theorem. The coordinates given are C=(5,6) and D=(2,2). The distance formula is:
d = √{(x₂ - x₁)² + (y₂ - y₁)²}
Substituting the coordinates of points C and D into the formula gives us:
d = √{(2 - 5)² + (2 - 6)²}
This simplifies to:
d = √{(-3)² + (-4)²}
Further simplifying:
d = √{9 + 16}
d = √{25}
Finally, taking the square root of 25:
d = 5
Therefore, the distance between point C and point D, rounded to the nearest tenth, is 5.0 units.
What is the GCF of two prime numbers
It must be 1.
Factors of prime numbers are 1 or themselves, the only factor common to all prime numbers is 1.
Echy~
The Greatest Common Factor (GCF) of two prime numbers is always 1.
The Greatest Common Factor (GCF) of two prime numbers is always 1 because prime numbers are numbers with only two factors: 1 and themselves.
For example, the GCF of 3 and 5, both prime numbers, is 1 because they do not have any common factors other than 1.
Therefore, when dealing with two prime numbers, the GCF will always be 1.
Javier has 4 boxes of comic books. The mean number of books in each box is 25 . Which number line shows what could happen to the mean if he fills two more boxes, one with 26 comic books and one with 30 comic books?
The mean could increase from 25 to 27.
Explanation:The mean number of books in each box is 25. If Javier fills two more boxes, one with 26 comic books and one with 30 comic books, the mean could increase or stay the same. Let's calculate the mean with and without the additional boxes:
Mean without additional boxes: (4 boxes * 25 books per box) / 4 = 25
Mean with additional boxes: (6 boxes * 25 books per box + 26 books + 30 books) / 8 = (150 + 26 + 30) / 8 = 27
Therefore, the mean could increase from 25 to 27 if Javier fills two more boxes with 26 and 30 comic books.
The cube of the product of 3 and a number.
The cube of the product of 3 and a number is expressed as (3x)³ or 27x³, which involves cubing the numeric part and multiplying the exponent of the variable by 3.
The question is asking about the volume of a cube with sides of length a and also about the process of cubing the product of a number and three. When we cube a product, such as 3 times an unknown number, we are calculating the result of multiplying that product by itself three times.
For example, if our number is x, we would express this as (3x)³ or 27x³. This is because when we cube a product, we cube the numeric part as usual, obtaining 3³ which is 27, and we multiply the exponent of the exponential term by 3, thus x becomes x³.
does anybody know the answer?