Answer:
Step-by-step explanation:
PART A: No, the trinomial 4x^3 + 28x + 49 is not a perfect square trinomial. To be a perfect square trinomial, the first and last terms must be perfect squares and the middle term must be twice the product of the square roots of the first and last terms. In this case, the first and last terms are not perfect squares, and the middle term is not twice the product of the square roots of the first and last terms.
PART B: To factor the expression 6x^2 + 5x - 4, we need to find two binomials whose product is equal to this expression.
First, we can break down the coefficient of x into two numbers whose product is 6 * (-4) = -24 and whose sum is 5. These numbers are 8 and -3.
Next, we use these two numbers to split the middle term 5x into two terms:
6x^2 + 8x - 3x - 4
We can now factor the expression by grouping:
(6x^2 + 8x) - (3x + 4)
2x(3x + 4) - 1(3x + 4)
(2x - 1)(3x + 4)
Therefore, the area of the rectangle can be factored as (2x - 1)(3x + 4).
To determine the dimensions of the rectangle, we set each factor equal to one of the dimensions and solve for the other dimension:
2x - 1 = length
3x + 4 = width
Alternatively, we could switch the factors and get the same answer:
2x - 1 = width
3x + 4 = length
Either way, these are the dimensions of the rectangle, expressed in terms of x.
Molly claims the animal listed in the table that weighs the most eats the most ahe also claims that the animal that weighs the least eats least
The animal listed in the table that weighs the most, eats the most,
and the animal that weighs the least, eats the least.
Molly's claim is correct.
What is the ratio?The ratio is a numerical relationship between two values that demonstrates how frequently one value contains or is contained within another.
A table is given below:
Animals Weight of the animals, The weight of food packages
Cat 6 Kg 300 grams.
Dog 12 Kg 900 grams.
From the table:
The animal listed in the table that weighs the most, eats the most,
and the animal that weighs the least, eats the least.
Therefore, Molly's claim is correct.
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there are several different models for geometries in which the points are ordered pairs (x, y) of real numbers; we plot these points in the usual way in the x y-plane.
A circle having radius 5 and centre at (0,0) has equation x² + y² = 25.
What is the equation of circle?
A circle is a closed curve that extends outward from a set point known as the centre, with each point on the curve being equally spaced from the centre. A circle with a (h, k) centre and a radius of r has the equation:
(x-h)² + (y-k)² = r²
Let (x,y) be any point on the circle.
Given that centre of the circle is origin (0,0).
Now, we know that the distance from any point on the circle to the centre is equal to the radius of the circle.
So, distance between point (x,y) and centre (0,0) is equal to radius of the circle which is given 5 units.
Now, using the distance formula -
√[(x - 0)² + (y - 0)²] = 5
Squaring on both the sides of the equation -
(x - 0)² + (y - 0)² = 25
So, the equation of the circle with radius 5, centred at the origin is x² + y² = 25.
Therefore, the equation is x² + y² = 25.
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carlos willl play today and tommorow. He plans to play. 15 minutes longer tomorrow, How should he expect his score to change?
Pls help asap
He should expected tomorrows's score to be about 75 points greater than today's score.
How to model the linear function?The slope-intercept definition of a linear function is given as follows:
y = mx + b.
In which:
m is the slope, representing the rate of change.b is the y-intercept, representing the value of y when x = 0.The input and output variables for this problem are given as follows:
Input: time in minutes.Output: score.The slope is given as follows:
m = 5.
Meaning that when the input increases by one, the output increases by 5, hence the expected score's increase with an increase in the input of 15 is given as follows:
15 x 5 = 75.
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There are 7 roses and 9 daisies in a vase. What is the ratio of all flowers in the vase to daisies? and What is the ratio of roses to all flowers in the vase? Thanks
Assume IJK ~ PQR with medians IM and PN
to sides JK and QR respectively, IJ = 15, and
PQ = 9. If IM is 2 greater than PN, find both
medians.
Step-by-step explanation:
Median IJK = IM = PN + 2
Median PQR = PN
Therefore, IM = PN + 2
IM = PN + 2
PN = IM - 2
IM = (15 + 9 + PN)/2
PN = (15 + 9 + IM - 2)/2
15 + 9 + PN = 2IM
15 + 9 + IM - 2 = 2PN
25 + PN = 2IM
25 + IM - 2 = 2PN
PN = 2IM - 25
PN = 2PN - 25
3PN = 25
PN = 25/3
IM = PN + 2
IM = 25/3 + 2
IM = 29/3
Therefore, IM = 29/3 and PN = 25/3.
A model rocket is launched with an initial upward velocity of67m/s . The rocket's height h (in meters) aftert seconds is given by the following. h=67t-5t^(2)
Find all values of for which the rocket's height is 30 meters
Round your answer(s) to the nearest hundredth.
(If there is more than one answer, use the "or" button.)
if is found that out of 53 cars,41 had clocks,30 had radios and 6 had neither. how many had a clock but no radio?
The number of 17 cars have clocks but no radios.
What is subtraction?Subtraction is a mathematic operation. Which is used to remove terms or objects in the expression.
Given:
Out of 53 cars,41 had clocks,30 had radios and 6 had neither.
That means,
53-6 = 47 cars have either clocks or radios or both.
47 - 30 = 17 cars have no radio.
47 - 41 = 6 cars have no clocks.
Hence, 17 cars have clocks but no radios.
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On the grid, draw the graph of y+2x=6 for values of x from -2 to 4
The graph of the y+2x=6 is given in the attachment.
What is Graph?Graph is a mathematical representation of a network and it describes the relationship between lines and points.
The standard equation of a line is expressed as y = mx + b, m is the slope
and b is the y-intercept.
Given the equation y = 2x - 2
If x = -2
y = 2(-2) - 2
y = -4-2
y = -6
If x = 4
y = 2(4) - 2
y = 8-2
y = 6
The point (-2, -6) and (4, 6 )must be on the line graph.
Hence, the graph of the y+2x=6 is given in the attachment.
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Marissa uses 64 feet of fence to make a border around a rectangular flower garden. The length of the garden is 20 feet. What is the width of the garden?
Answer: 12 feet
Step-by-step explanation: If the length of the garden is 20 feet then that means 40 feet of fence was used to make both lengths of the garden. So we subtract 40 from 64 which leaves us with 24 feet and then we divide 24 by 2 to get 12 because there are 2 widths.
Hope this helps!
An investment of $1200.00 is growing at the rate of 2.6% per year. What is the growth in balance from year 20 to year 25?
1) None of the answers are correct
2)16.52
3) 2655.89
4)265.59
5)156.00
6)274.57
Answer:
6
Step-by-step explanation:
The growth in balance from year 20 to year 25 is $274.57.
Find the slope of line
Slope; m=?
Answer:4/3
Step-by-step explanation: rise over run when finding slope, and the first point i can find (-3,-5) is 4 up and 3 right away from (0,-1)
Express each of the following numbers in standard scientific notation, rounding off each to three significant digits. a. 422.65 times 10^-3 b.71.246 times 10^5 c. 0.00044515 d. 22.9987 times 10^-5 e. 9.7222 times 10^5f. 0.0048545 times 10^5
In normal scientific notation, round off each integer to three significant digits:
a. 4.227 x 10⁻²
b. 7.125 x 10⁶
c. 4.452 x 10⁻⁴
d. 2.300 x 10⁻⁴
e. 9.722 x 10⁵
f. 4.855 x 10³
What is scientific notation?Scientific notation is a method of expressing numbers that are either too large or too little to be represented in decimal form. In the United Kingdom, it is known as scientific form, standard index form, or standard form. Scientific notation is a method of writing extremely big or extremely tiny integers. When a number between 1 and 10 is multiplied by a power of 10, it is expressed in scientific notation.
Here,
a. 422.65 times 10⁻³ = 4.227 x 10⁻²
b. 71.246 times 10⁵ = 7.125 x 10⁶
c. 0.00044515 = 4.452 x 10⁻⁴
d. 22.9987 times 10⁻⁵ = 2.300 x 10⁻⁴
e. 9.7222 times 10⁵ = 9.722 x 10⁵
f. 0.0048545 times 10⁵ = 4.855 x 10³
The following numbers in standard scientific notation, rounding off each to three significant digits:
a. 4.227 x 10⁻²
b. 7.125 x 10⁶
c. 4.452 x 10⁻⁴
d. 2.300 x 10⁻⁴
e. 9.722 x 10⁵
f. 4.855 x 10³
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Evaluate the expression 5+(-3x) for the given x-values. a) x=3 b) x=1/3 c( x= -3
Answer:
-4
4
14
Step-by-step explanation:
A:
5 + (-3)(3) = 5 -9 = -4
B:
5+ (-3)(1/3) = 5 - 1 - 4
C:
5 + (-3)(-3) = 5 + 9 = 14
What is the volume of a block of wood with a height of 3 inches, a length of 5 inches and a width of 10 inches?
30 inches cubed
15 inches
150 inches
150 inches cubed
help pls
Answer:
150 in cubed
Step-by-step explanation:
Solve with a = 5.
20÷8
Answer:I.65
Step-by-step explanation:
The smallest number such that when it is divided by 8 has a remainder of 6 and when it is divided by 9, has a remainder of 7
Using the Chinese Remainder Theorem, the smallest positive integer solution is x1 = 62.
How to Apply the Chinese Remainder Theorem?We can use the Chinese Remainder Theorem to find the smallest positive integer solution for this problem.
The Chinese Remainder Theorem states that if x ≡ a (mod m) and x ≡ b (mod n), then x is congruent to a unique value modulo mn. That is, there exists a unique solution x such that x is congruent to a modulo m and congruent to b modulo n, and the solution x is between 0 and mn - 1.
So, we want to find the smallest x such that:
x ≡ 6 (mod 8) and x ≡ 7 (mod 9)
We can start by finding a solution x1 such that x1 ≡ 6 (mod 8) and x1 ≡ 7 (mod 9). One such solution is:
x1 = 6 + 8k for some integer k
We can use the formula x1 = 6 + 8k to find a solution x1 that is also congruent to 7 (mod 9):
x1 = 6 + 8k = 7 + 9l (mod 9)
Expanding the right side of this equation, we get:
6 + 8k = 7 + 9l (mod 9)
6 - 7 = 9l - 8k (mod 9)
-1 = 9l - 8k (mod 9)
Since 9 and 8 are relatively prime, we can use the Extended Euclidean Algorithm to find integers r and s such that:
8r + 9s = gcd(8, 9) = 1
Using the Euclidean Algorithm, we can find r = -1 and s = 1. So,
-8 = 9(l - rk) (mod 9)
Since 9 is relatively prime to 8, l - rk is a multiple of 9. We can then rewrite the equation as:
-8 = 9j (mod 9)
Adding 9 to both sides of the equation, we get:
1 = 9j (mod 9)
So, j = 1.
Now, we have:
k = (1 - l) / r
Since r = -1, we can replace k with -l:
k = -l
So, we have:
x1 = 6 - 8l
And,
x1 = 7 + 9l (mod 9)
Combining these two equations, we get:
6 - 8l = 7 + 9l (mod 9)
Subtracting 9l from both sides, we get:
-2l = 13 (mod 9)
Dividing both sides by -2, we get:
l = -13 / -2 = 7 (mod 9)
So,
k = -l = -7 (mod 9)
And,
x1 = 6 - 8(-7) = 6 + 56 = 62 (mod 8)
So,
x1 = 62 (mod 8) and x1 = 7 (mod 9)
The smallest positive integer solution is x1 = 62
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The equation
V
=
23900
(
0.91
)
t
V
=
23900
(
0.91
)
t
represents the value (in dollars) of a car
t
t
years after its purchase. Use this equation to complete the statements below.
The value of this car is at a rate of
The purchase price of the car was .
Answer: The equation represents the value (in dollars) of a car t years after its purchase, so the purchase price of the car would have been the value of the car when t = 0. Plugging in t = 0 into the equation, we get:
V = 23900 * (0.91)^0
V = 23900
So the purchase price of the car was $23,900.
Regarding the rate of decrease in the value of the car, we can observe that the value decreases at a rate proportional to (0.91)^t, so the rate of decrease is proportional to 0.91.
Step-by-step explanation:
In a particular game of dice, you roll a single fair 6-sided die. You win 50 points for rolling a 1 or a 6, but you lose 5 points anytime you roll any other number. If you rolled the die 100 times, how many points would you expect to gain
or lose?
A. a gain of about 1,333 points
B. a gain of about 4,500 points
C. a loss of about 500 points
D. a gain of about 2,000 points
Answer: The expected value for rolling a 1 or 6 is 50 points, and the expected value for rolling any other number is -5 points. The chance of rolling a 1 or 6 is 2/6, or 1/3. The chance of rolling any other number is 4/6, or 2/3. The expected value for rolling the die once is:
(1/3 * 50) + (2/3 * -5) = 16.67
So, if you rolled the die 100 times, you would expect to gain or lose:
100 * 16.67 = 1667 points
The answer is: a gain of about 1,667 points.
Step-by-step explanation:
The sum of two three-digit number b67 and aa5 is a four-digit number 1a12. What is the value of (a + b)?
Answer: 13
Step-by-step explanation: The two numbers are 967 and 445 making a=4 and b=9. We know a+b= 9+4 which is 13. For starters, you add the last digits of b67 and aa5 so 7+5=12 which is why the four digit number ends in two. When adding, the one from 12 would carry so the second to last digit on the four digit number would have to be 11. To get eleven you would add 7 and 4. The seven comes from the second digit in the b67 number including the one that came from 7+5=12. Now we know a=4. Knowing this now aa5= 445 and 1a12= 1412. We can now substract 445 from 1412 to get 967. b67= 967. To check 967+445=1412.
grant is thinking of two numbers. He says one of the numbers is twice the other number and the sum of the numbers is 42. what are the numbers?
Answer:
Answer is in attached photo.
Step-by-step explanation:
SolutionThe solution is in the attached photo, do take note to solve this question, we can assign 2 variables to the 2 conditions stated in the question, and solve them simultaenously.
PLEASE HELP URGENT im using my last points for this
The publisher nedds to produce 2414 books and sell so that production cost will equal the money from sales.
What is linear equation?Equations whose variables have a power of one are called linear equations. One example with one variable is where ax+b = 0, where a and b are real values and x is the variable.
Given:
A small publishing company is planning to publish a new book.
The production costs will include one-time fixed costs (such as editing) and variable costs (such as printing).
The one-time fixed costs will amount to $27,160.
The variable costs will be $8.75 per book.
The publisher will sell the finished product to bookstores at a price of $20.00 per book.
Let x be the number of books.
Cost = 8.75x + 27160
Revenue = 20x
Revenue = cost
20x = 8.75x + 27160
11.25x = 27160
x = 2414.2
x ≈ 2414 books.
Therefore, the required number of books are 2414 books.
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Mary buys a pack of sugar paste to cover her cakes. the pack is in the shape of a cuboid measuring 5cm by 8cm by 9cm a) she rolls out her sugar paste into rectangular sheet of pasty of uniform thickness measuring 30cm by 60cm. Work out the thickness of this rectangular sheet. B) Mary cuts out two circular pieces of pastry, each of diameter 25cm from her rectangular sheet of pastry. What volume of pastry remains when she removes these two circular pieces of pastry?
A. The thickness of the rectangular sheet of sugar paste is 1/5 cm.
B. The volume of the remaining pastry can be expressed as approximately 45.84 cm³.
What is the volume of the cuboid?The volume of a cuboid is equal to the product of the length, width, and height of a cuboid.
The volume of a cuboid is length × breadth× height
A) The volume of the cuboid pack of sugar paste is 5 cm x 8 cm x 9 cm = 360 cm³.
To find the thickness of the rolled-out rectangular sheet, we need to divide the volume of the pack by the area of the rectangular sheet:
thickness = volume/area
thickness = 360 cm³ / (30 cm x 60 cm)
thickness = 360 cm³ / 1800 cm²
thickness = 1/5 cm
So the thickness of the rectangular sheet of sugar paste is 1/5 cm.
B) The two circular pieces of pastry each have a diameter of 25 cm and thus a radius of 25/2 = 12.5 cm.
The volume of each circular piece of pastry can be calculated as:
V = π × (radius)² × thickness
V = π × (12.5 cm)² × 1/5 cm
V = π × 156.25 × 1/5 cm³
V = 50 × π cm³
Since Mary cuts out two circular pieces, the total volume of pastry that she removes is 2 x 50 x π cm³. The remaining volume of pastry is the original volume of the pack minus the volume of the two circular pieces:
Volume remaining = 360 cm³ - 2 × 50 × π cm³ = 45.84 cm³
The volume of the remaining pastry can be expressed as approximately 45.84 cm³.
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Determine whether each fraction on the left is a proper or an
improper fraction. Options on the right may be used more than
once.
27
27
17
6100
21
5
Proper fraction
Improper fraction
Answer:
Improper, proper, proper, improper
Step-by-step explanation:
Step-by-step explanation:
To be a proper fraction the numerator (top number) must be less the the denominator (bottom number). Let’s start at the top.
27/27
This would be an improper fraction because the numerator is equal to the denominator, not less.
6/17
Because 6 is less then 17 this would make it a proper fraction
8/9
Same case as the last one, this is a proper fraction because the numerator is less then the denominator
21/5
21 is definitely more the 5 making this a improper fraction.
Hope this helped :)
Equation that represents the graph below:
The linear equation on the graph is:
y = x + 3
How to write the equation of the line?Here we have a linear equation.
Remember that the general one is y = a*x + b where b is the y-intercept, here we can see that the line intercepts the y-axis at y = 3
y = a*x + 3
And it passes through the point (-3, 0), replacing these values we get:
0 = a*-3 + 3
3a = 3
a = 3/3 = 1
The linear equation is:
y = x + 3
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find the expansion of (x y)5 a) using combinatorial reasoning
b) using the binomial theorem.
Using combinatorial reasoning, the expression of[tex](x y)5 is x^5y^5 + 5x^4y^6 + 10x^3y^7 + 10x^2y^8 + 5xy^9 + y^10[/tex]. Using the binomial theorem, it is[tex]1x^5 + 5x^4y + 10x^3y^2 + 10x^2y^3 + 5xy^4 + y^5[/tex].
a) Combinatorial reasoning involves breaking the expression down into different combinations of x and y, and then multiplying each combination. In this case, (x y)5 can be broken down into
[tex]x^5y^0 + x^4y^1 + x^3y^2 + x^2y^3 + x^1y^4 + x^0y^5[/tex],
and the coefficient of each term is the number of ways that combination can be derived from the expression. For example, there are 5 ways to arrange the combination [tex]x^4y^1[/tex], so its coefficient is 5. When the coefficients are multiplied with the combinations, they become
[tex]5x^4y^1 + 10x^3y^2 + 10x^2y^3 + 5xy^4 + y^5[/tex],
which is the expansion of (x y)5.
b) The binomial theorem states that for any expression of the form [tex](x + y)^n[/tex], the expansion can be found by multiplying the term[tex]x^n[/tex]with the coefficient of each term in Pascal’s triangle. For example, for[tex](x + y)^5[/tex], the coefficient of[tex]x^5[/tex] is 1, the coefficient of[tex]x^4y[/tex]is 5, the coefficient of[tex]x^3y^2[/tex]is 10, the coefficient of [tex]x^2y^3[/tex]is 10, the coefficient of[tex]x^1y^4 is 5[/tex], and the coefficient of[tex]y^5[/tex]is 1. Thus, the expansion of [tex](x + y)^5 is 1x^5 + 5x^4y + 10x^3y^2 + 10x^2y^3 + 5xy^4 + y^5.[/tex]
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How do I find the solution
Answer: maybe look up the answer and ask ur teacher what to do
Step-by-step explanation:
50x+ 20 - 60(1/5y+60x) simplify the expression.
Answer:
-3550x - 12y + 20
Step-by-step explanation:
50x+ 20 - 60(1/5y+60x)
50x + 20 - 12y - 3600x
-3550x - 12y + 20
PLEASE HELP ASAP!!! FIND THE MULTIPLICITY AND ZEROS FOR THE GRAPH.
There are 4 zeros in the graph and the multiplicity is 5.
What are the zeros of a function?The zeros of a function are defined as the values of the variable of the function such that the function equals 0. Graphically, the zeros of a function are the points on the x-axis where the graph cuts the x-axis. In other words, we can say that the zeros of a function are the x-intercepts of its graph. The number of zeros of a polynomial function is equal to the degree of the polynomial.
In the given graph,
There are 4 turning points in the graph.
The 4 zeros from the graph are
(-3, 0), (-2, 0), (1, 0) and (1.5, 0)
The graph touches the x-axis and bounces off of the axis, it is a zero with multiplicity is 5.
Therefore, there are 4 zeros in the graph and the multiplicity is 5.
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not a hard question!!!!
This is just a general how to! No example problems are attached, just explain how to do this, please!!!
1. given the graph of f(x) find f'(x)
2. find the piecewise for f(x)
To find the derivative of a piecewise function, you need to take the derivative of each individual piece and then combine them into one piecewise function.
How to explain the functionThe derivative of each piece can be found using the usual rules of differentiation (such as the power rule, sum rule, product rule, etc.).
Once you have the derivatives of each piece, you can write the overall derivative as a piecewise function, where the expression for each piece is limited to a specific range of x-values. The limits of each piece are defined by the breakpoints in the original function.
For example, if the original function is given as:
f(x) = {x^2 for x < 0,
x for 0 <= x < 1,
2x for x >= 1}
Then the derivative of f(x) can be found as:
f'(x) = {2x for x < 0,
1 for 0 <= x < 1,
2 for x >= 1}
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Your interest rate is compounded semi annually. If you have a annual interest rate of 7.5%, how much is the semi annual interest rate
Answer:
3.75%
Step-by-step explanation:
You want to know the semiannual interest rate if the annual rate is 7.5%.
Periodic rateThe rate of interest for a period is the annual rate divided by the number of periods in a year.
Interest compounded semiannually is compounded 2 times per year. The semiannual rate is ...
7.5%/2 = 3.75% . . . . semiannual rate