The solution to the equation are 5 or -1 after applying the quadratic formula.
What is a quadratic equation?Any equation of the form [tex]\rm ax^2+bx+c=0[/tex] where x is variable and a, b, and c are any real numbers where a ≠ 0 is called a quadratic equation.
It is given that:
x² - 4x² - 5 = 0
The above equation is a quadratic equation:
Using the quadratic formula:
[tex]\rm $x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}$[/tex]
Plug the values in the formula:
[tex]\rm $x=\dfrac{-(-4)\pm\sqrt{(-4)^2-4(1)(-5)}}{2(1)}$[/tex]
After solving:
x = 5 or -1
Thus, the solution to the equation is 5 or -1 after applying the quadratic formula.
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What is the intermediate step in the form (x+a)^2=b(x+a)
2
=b as a result of completing the square for the following equation?
x^2-28=12x
The intermediate step in the form (x + a)² =b as a result of completing the square for the given equation is (x - 6)² = 64
Given,
The equation x² - 28 = 12x
We need to find the intermediate step in the form (x + a)² =b as a result of completing the square for the given equation
Equation; x² - 28 = 12x
Arrange the equation;
x² - 12x = 28
Take the coefficient of x
k = -12
Divide it by 2
k/2 = -6
Square both sides
(k/2)² = 36
Add 36 to both sides of x² - 12x = 28
x² - 12x + 36 = 28 + 36
(x - 6)² = 64
Therefore,
The intermediate step in the form (x + a)² =b as a result of completing the square for the given equation is (x - 6)² = 64
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A study of the population of deer in a park finds that the population decreases by 1.2% each year. The deer population at the beginning of the study is 525. Write an equation to model the population of deer in the park after x years. After how many years will the population of deer in the park be less than 200?
The exponential decay of the function shows it will take approximately 81 years for the population to decrease to 200
Exponential FunctionAn exponential function is defined by the formula f(x) = ax, where the input variable x occurs as an exponent. The exponential curve depends on the exponential function and it depends on the value of the x. This could also be an exponential growth or exponential decay which depends on the situation.
The exponential function is an important mathematical function which is of the form f(x) = ax
The details given in this question are;
Rate = 1.2% Initial population (P) = 525Final population = 200Number of years = x.The exponential function to represent this will be given as
200 = 525(1 + 0.012)⁻ˣ
x = number of years
This can be simplified as
200 = 525(1.012)⁻ˣ
x = 80.9 years
It will take approximately 81 years
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1. Find the average rate of change on the interval [-2, 2] for each of the functions below.
a. a(x) = 2x + 1
b. b(x) = x² + 2
d. Which function has the greatest average rate of change over the interval x = -2 to x = 2?
c. c(x) = 2x - 1
The greatest average rate is. x^2+1
What is ROC?
The rate of change is measured by a line's slope.Rate of Change: How quickly a variable changes over a predetermined amount of time. It is frequently used while discussing momentum and is typically expressed as a ratio of one variable's change to another's corresponding change. This ratio is graphically represented by a line's slope.acc toour question-
(1+4x)/2 f(2) = 9/2; f(-1) = -3/2 AROC = (9/2 - -3/2)/3 = 12/2 over 3 = 6 /3 or is it 1+ 4x/2 = 1+2x ??? f(2) = 5; f(-1) = -1; AROC = (5 - -1)/3 = 6/3 = 2 <--- YES !!!B) f(2) = 2^2 - 2 = 4 - 2 = 2 f(-1) = (-1)^2 - (-1) = 1 - (-1) = 1+1 = 2 AROC = (2-2)/3 = 0/3 = 0 <--- NOC) f(2) = 2^2 = 4; f(-1) = (-1)^2 = 1; AROC = (4-1)/3 = 3/3 = 1 <--- NOd) f(2) = 2^2 + 2 = 4+2=6 f(-1) = (-1)^2 + (-1) = 1+(-1) = 0 (6-0)/3 = 6/3 = 2Learn more about roc click here:
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Each day last week you sold 32, 45, 47, 63, and 72 product accessories. What was the median number of accessories you sold for the week?".
The answer is 47.
Step-by-step explanation:
To find the median, you need to write the numbers in order from least to greatest. However, that is already done.
Then, you need to count the numbers from the ends to the middle.
For example, if the numbers were 2, 4, 8, 9, and 10, you would do it like this (see the example below)
So, you would go from 32 to 45 and 72 to 63, and from 45 to 47 and 63 to 47.
This means that the median is 47.
Write an equation in slope-intercept form of the line that passes through (6,
-1) and (3,
-7).
Answer: y = 2x - 13
Step-by-step explanation:
y=mx + b
[tex]m= \frac{-7-(-1)}{3-6}[/tex]
[tex]= \frac{-6}{-3}[/tex]
[tex]m = 2[/tex]
y = 2x + b
(6, -1) <-- use to find "b" by substituting either one of the coordinates
-1 = 2(6) + b
-1 = 12 + b
-13 = b
y = 2x - 13
Enola opened a savings account with $8400 that earns 1.8% simple interest annually. After how many years will the balance of the account be $9600? Round to the nearest tenth, if necessary.
After 8 years the balance of the account would be $9600.
What is simple interest?
Simple interest is a quick and simple formula for figuring out how much interest will be charged on a loan. The daily interest rate, the principle, and the number of days between payments are multiplied to calculate simple interest.
Simple Interest =(P×r×t)/100
where:
P =Principal
r = interest rate
t = time
Given:
Principal, P = $8400
Rate of interest, r = 1.8%
Final amount, A = $9600
Simple interest, S.I = Final amount - Principal = 9600 - 8400 = $ 1200
Now, 1.8% of 8400 = (1.8/100) × 8400 = 151.2
⇒ Interest of 1 year = $151.2
Interest after x years = $1200
x = 1200/151.2 = 7.94 ≈ 8 years
Therefore, after 8 years the balance of the account would be $9600.
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Triangle xyz was translated up 2 and right 3 units, creating triangle cab. Which relationship between the parts of the two triangles must be true?.
The congruency relationship which hold true after transformation is
YZ ≅ AB
What is congruent ?
In mathematics, the term "congruent" refers to figures and shapes that can be flipped or rearranged to match up with other ones. These forms can be mirrored to produce related shapes.
Explanation:
A translation is known as a rigid transformation. This is because it preserves congruence. Since CAB is created from XYZ, this tells us that:
X corresponds to C; Y corresponds to A; Z corresponds to B; XY corresponds to CA; YZ corresponds to AB; and XZ corresponds to CB.
Since the triangles are congruent, the corresponding pieces are congruent as well.
Out of these corresponding congruent pieces of triangles, the only one in our options is YZ ≅ AB.
Hence the answer is YZ≅AB.
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hi! could i get some help on this pls! ty
Left Blue Dot (5,9)
Right Blue Dot (7,0)
m = (y2 - y1)/(x2-x1)
= (9-0)/(5-7)
=9/-2
m = -9/2
Don't know the y-intercept so use the formula below to calculate equation of line
y-b = m(x-a)
y-9 = -9/2(x-5)
y-9 = -9x/2 + 45/2
y = = -9x/2 + 45/2 + 18/2
y = -9x/2 + 63/2
help meeeeeeeeeeee pleaseee rnnnnn!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
The amount owed is $10865, based on the given parameters
How to determine the amount owed in six years?The given parameters about the compound interest are
Principal Amount, P = $5300
Interest Rate, R = 8%
Time, t = 6 years
To calculate the amount owed, we make use of the following formula
A = P + CI
Where
Compound interest, CI = P(1 + R)^t - P
So, the equation becomes
A = P + P(1 + R)^t - P
Evaluate the like terms
A = P(1 + R)^t
In this question, the formula is given as
A = P(1 + r/n)^nt
Where
n = 12, i.e compounded monthly
Substitute the known values in the above equation
A = 5300 * (1 + 8%/12)^(6*12)
Express 8% as decimal
A = 5300 * (1 + 0.08/12)^(6*12)
Evaluate the sum
A = 5300 * (1.01)^(6*12)
Evaluate the exponent
A = 5300 * 2.05
Evaluate the product
A = 10865
Hence, the value of the amount after 6 years is $10865
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Question 1(Multiple Choice Worth 1 points)
(03.01 MC)
Simplify √5(6-4√3)
09
30√3
06√5-4√15
O√30-20√3
Answer:
6√5 - 4√15
Step-by-step explanation:
√5(6 - 4√3) =
Distribute √5
= 6√5 - 4√3√5
= 6√5 - 4√15
Which list of minerals is grouped based on color?
bornite, chalcopyrite, and hematite
chalcopyrite, pyrrhotite, and pyrite
hematite, bornite, and pyrite
pyrrhotite, goethite, and hematite
The list of minerals that is grouped based on color is B. chalcopyrite, pyrrhotite, and pyrite.
What minerals does chalcopyrite share a color with?Chalcopyrite is a mineral that has a high concentration of copper ore. As a result, it has a golden yellow color due to the copper in it. It also has crystals of a tetragonal form.
Pyrrhotite is a mineral with iron in it. It has the color of bronze yellow which means that it is similar in color to Chalcopyrite. We also have Pyrite which is brass yellow in color and looks golden. This puts it in the same color group as Chalcopyrite.
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Explain how proving two triangles congruent can help prove parts of the triangle congruent.
Answer:
If two triangles are congruent, then by the definition of congruent triangles, 3 pairs of sides are congruent and 3 pairs of angles are congruent. In all, this is 6 statements of congruence.
There are ways of proving triangles congruent that require only 3 statements of congruence of corresponding parts, such as ASA, SAS, AAS, etc.
Sometimes in order to prove two segments or two angles congruent, since these segment and angles are parts of triangles, you prove the triangles congruent using some other statements of congruence, not involving these parts, and then you get 6 statements of congruence that includes the parts you wanted to prove congruent. That is where you use "corresponding parts of congruent triangles are congruent", or CPCTC for short.
solve 2^(x+3)=(1/8)^(x+2) for x
Answer:
-9/4 Negative As a Fraction
How I got the answer:
2 (x+3) = (1/8) (x+2)
x+ 3 = -3 (x+ 2)
x = -9/4
I helped you so mark me BRAINLIEST
(-3, -2) and (x, 6); m = 2
Answer:
1
Step-by-step explanation:
(y2-y1)/(x2-x1) is the formula for slope (aka m)
6-(-2)/1-(-3) = 8/4 = 2
A teacher buys 100 pencils to keep in her classroom at the beginning of the school year. She allows the students to borrow pencils, but they are not always returned. On average, she loses about 8 pencils a month. Which equation represents the number of pencils she has left y after a number of x months?.
A teacher buys pencils= 100
the equation is y=8x/100.
total number of pencils = 100
average number of pencil lost in months = 8
number of pencil lost in one month = 8/100
pencil left = y
months = x
so the equation would be:
y = 8x/100.
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Does anyone know the answer?
Answer:
a. -13
b. 14
c. -6
Step-by-step explanation:
a.
Substitute x = -3 into the equation.
f(-3) = 2(-3) - 7
= - 6 - 7
= -13
b.
Substitute f(x) = 21 into the equation.
2x - 7 = 21
2x = 28
x = 14
c.
Substitute x = 1/2 into the equation.
f(1/2) = 2(1/2) - 7
= 1 - 7
= -6
4/5(-7x-1/2)=-2x-(4x-1)
Answer:
x = 7/2
Step-by-step explanation:
-28/5 x -2/5 = -2x -4x + 1
-28/5 x -2/5 = -6x + 1
-28 x -2 = -30x + 5
30 x -28 x = 5 + 2
2x = 7
2/2 x = 7/2
x = 7/2
Answer:
(7/2)
Step-by-step explanation:
I'll rewrite "4/5(-7x-1/2)=-2x-(4x-1)" to (4/5)(-7x-1/2)=-2x-(4x-1) to clarify the fraction (I am not interpreting it as 4/(5(-7x-12))). [The five is not part of the denominator in my rewrite]
(4/5)(-7x-1/2)=-2x-(4x-1)
(-28x-2)= 5*((-6x+1)) [multiply the numerator by 4 on the left side, and multiply both sides by 5]
-28x-2= -30x + 5 [Combine like terms]
2x = 7 [Put like terms together by adding 30x and +2 to both sides]
x = (7/2) This satidfies the equation.
If x= 4-5 and y = -4 - 7i, what is x + y?
The value of x + y is -12i.
What are complex numbers?
Real numbers and imaginary numbers combine to form complex numbers, which have two components. Complex numbers serve as the foundation for more complex math, including algebra. They have numerous practical applications, particularly in the fields of electronics and electromagnetism.
Here, we have
Given x = 4 - 5i and
y = -4 - 7i
Now we have to find the value of x+y.
We will add both complex numbers and we get
x + y = 4 - 5i + (-4 -7i)
x + y = - 12i
Hence, the value of x + y is 12i.
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the expression 18+1.5x is 8 less than 36.5. What is the value of 4x
In the expression 1.5x + 18 = 36.5 - 8 x is 7, hence 4x is 28.
What are inequalities and their types?Inequality is a relation that compares two numbers or other mathematical expressions in an unequal way.
The symbol a < b indicates that a is smaller than b.
When a > b is used, it indicates that a is bigger than b.
a is less than or equal to b when a notation like a ≤ b.
a is bigger or equal value of an is indicated by the notation a ≥ b.
Given, An expression 18 + 1.5x is 8 less than 36.5.
∴ 1.5x + 18 = 36.5 - 8.
1.5x = 36.5 - 8 - 18.
1.5x = 10.5.
x = 10.5/1.5.
x = 7.
Therefore 4x is equal to 4(7) = 28.
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On the grid below, draw the graph of y = 2 – 3x for values of x from – 3 to 3
The graph of the linear function f(x) = 2 - 3x is a straight line attached below
Graph of Linear FunctionA linear function is a function that represents a straight line on the coordinate plane. For example, y = 3x - 2 represents a straight line on a coordinate plane and hence it represents a linear function. Since y can be replaced with f(x), this function can be written as f(x) = 3x - 2.
A linear function is of the form f(x) = mx + b where 'm' and 'b' are real numbers. Isn't it looking like the slope-intercept form of a line which is expressed as y = mx + b? Yes, this is because a linear function represents a line, i.e., its graph is a line. Here,
m = slope of the lineb = y-intercept of the linex = is the independent variabley (or f(x)) = dependent variableThe function given y = 2 - 3x can be plotted on a graph using function table
When x = -3
f(-3) = 2 - 3(-3)
f(-3) = 11
when x = -2
f(-2) = 8
when x = - 1
f(-1) = 1
when x = 0
f(0) = 2
when x = 1
f(1) = -1
when x = 2
f(2) = -4
when x = 3
f(3) = - 7
We can use this data and plot a graph.
Kindly find the attached graph of the function below
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HELP MEEEE PLEASE TYYY
Answer:
241.9026
Step-by-step explanation:
2*pi*r
Answer:
241.9 cm
Step-by-step explanation:
circumference= [tex]\pi[/tex]d
circumference= [tex]\pi[/tex](77)
circumference= 241.9 cm
Find the -intercept and -intercept of the line.
3x + 5y = -6
Answer:
The intercept would be -6/5
Step-by-step explanation:
Answer:
y=-3 x=-3
Step-by-step explanation:
Select all of the equations below that have no solutions.
Select 2 correct answer(s)
3x + 5 = 3x + 8
3(x + 5) = 3x + 15
2(x + 1) = 2x + 1
2x + 1 = 2x + 1
Answer:
3x + 5 =3x + 8
Step-by-step explanation:
3x - 3x = 8-5
x = 3
Step-by-step explanation:
we have to soft the ones that have no solutions.
3x + 5 = 3x + 8
5 = 8
that is never true, and therefore there is no solution.
3(x + 5) = 3x + 15
3x + 15 = 3x + 15
that is always true, and it has therefore infinitely many solutions.
2(x + 1) = 2x + 1
2x + 2 = 2x + 1
2 = 1
this is never true, so, there is no solution.
2x + 1 = 2x + 1
this is always true, so this has infinitely many solutions.
What is the absolute value of +4?.
The absolute value of +4 will be 4 units as it is the distance from (0,0) to (4,0) in coordinate plane.
What is absolute value?Without taking into account direction, absolute value defines how far a number is from zero on the number line. A number's absolute value can never be negative. Look at some illustrations. 5 is the sum of its absolute values. There are 5 units between 5 and 0. A number's absolute value is determined by how far it is from zero on the number line. For instance, the absolute value of -7 would be 7, as it is 7 units away from zero. Additionally, since 0 is 7 units distant, the value of 7 would likewise be 7.
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In Quadrilateral ABCD , AB¯¯¯¯¯∥CD¯¯¯¯¯ and m∠2=31°. What is m∠5? Enter your answer in the box. ° Trapezoid A B C D with segment B D. Angle A D B is angle 1. Angle B D C is angle 2. Angle C is angle 3. Angle A is angle 4. Angle A B D is angle 5. Angle C B D is angle 6.
The measure of m∠5 is 31 degrees.
What are alternate angles?
Alternate angles are angles that occur on opposite sides of the transversal line and have the same size. Alternate angles are equal
Given that,
The AB is perpendicular to CD.
And, the m∠2=31°.
Based on the above information, the following information should be considered:
The alternate angles should be equal i.e. ∠2 = ∠5 and ∠1 and ∠6.
So, ∠5 = ∠2 = 31 degrees.
Therefore we can conclude that the measure of m∠5 is 31 degrees.
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A contractor needs to buy nails to build a house. The nails come in small boxes and large boxes. Each small box has 100 nails and each large box has 450 nails. The contractor bought 3 more small boxes than large boxes, which altogether had 2500 nails. Determine the number of small boxes purchased and the number of large boxes purchased.
The total number of small boxes is 1.72 and the large boxes is 5.1.
Given;
To build a house, a contractor has to purchase nails. Both small and large boxes of nails are provided. There are 100 nails in each small box and 450 in each large box. The contractor purchased 3 more tiny boxes—totaling 2500 nails—than large boxes.
To calculate the proportion of small and large boxes that were bought,
Let's assume the small boxes as 's' and the big boxes as '3s'.
∴ s(100) + 3s(450) = 2500
100s + 1350s = 2500
1450s = 2500
s = 2500/1450
s = 1.72
∴ 3s = 1.72 * 3
= 5.1
Hence, the total number of small boxes is 1.72 and the number of large boxes is 5.1.
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The number of small boxes purchased is 7 and the number of large boxes purchased is 4 by the contractor.
Let the number of large boxes purchased = x
then the number of small boxes purchased = x + 3
It is also given that,
small box contains = 100 nails
large box contains = 450 nails
According to the question:
450x + 100(x + 3) = 2500
450x + 100x + 300 = 2500
550x = 2500 - 300 = 2200
x = 2200/550
x = 4
and x + 3 = 4 + 3 = 7.
Thus, Let the number of small boxes purchased = 4 and the number of small boxes purchased = 7.
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Describe the transformation of the parent
function f(x) = x².
f(x) = (x − 1)² +3
The transformation from the parent function is a translation by 1 unit right and 3 units up
How to describe the transformation from the parent function?From the question, we have the following function that can be used in our computation:
f(x) = x²
f(x) = (x − 1)² + 3
First, we have the transformation to be:
From f(x) = x² to f(x) = (x − 1)²
This means the function is translated right by 1 unit
Next, we have:
From f(x) = (x − 1)² to f(x) = (x − 1)² + 3
This means the function is translated up by 3 units
Hence, the transformation is 1 unit right and 3 units up
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in the parallelogram pqrs shown below, ps is 7 centimeters long. if the parallelogram's perimeter is - 40 centimeters, how many centimeters long is pq?
13 cm long is PQ in parallelogram .
What does parallelogram mean in a nutshell?
A parallelogram is a geometric shape with parallel sides that exists in two dimensions. The pair of parallel sides in this sort of polygon with four sides, also known as a quadrilateral, are of equal length. In a parallelogram, the sum of the adjacent angles is 180 degrees.Perimeter of ∥gm = - 40 cm
2(PQ+ PS) = - 40
2 ( PQ + 7 ) = 40
PQ + 7 = 20
PQ = 20 - 7
PQ = 13 cm
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John wants to buy a new TV. The price is , and the sales tax is 5 percent.
Store A is offering a 10 percent discount and Store B is offering a rebate.
What would John's total cost be at each store? Make sure to record your answers to the nearest cent.
Total cost at Store A = $
Total cost at Store B = $
Price of Tv at Store A = $ 94.5
Price of Tv at Store B = $ 95
How to calculate the price?Given that
Price of tv player = $ 100
Sales Tax = 5%
The price of tv at store A after 10% discount = 100 - 10% of 100
The price of tv at store A after 10% discount:
= 100 - 0.1x100
= 100 - 10 = $90
Price of tv at store A after sales tax = 90 + 5% of 90
= 90 + 0.05x90
= 90 + 4.5
= $94.5
Now, lets calculate price of of tv at store B.
The price of tv at store B= 100
Price of tv at store B after sales tax:
= 100 + 5% of 100
Price of tv at store B after sales tax = 100 + 0.05x100
= 100 + 5
= $105
Price of tv at store B $10 rebate
= 105 - 10
= $95
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Complete questions
John wants to buy a tv. The price is $100, and the sales tax is 5 percent. Store A is offering a 10 percent discount and Store B is offering a $10 rebate. What would John's total cost be at the two stores? Total cost at Store A = Total cost at Store B =
A triangle has sides of length of 39 mm 56 mm and 37 mm is it a right triangle
By Pythagoras theorem, The given triangle with sides 37 mm, 39 mm, 56 mm is not a right triangle as the theorem is false in this case.
What is Pythagoras theorem?The Pythagorean theorem, also known as Pythagoras' theorem, is a fundamental relationship between a right triangle's three sides in Euclidean geometry. In a right-angled triangle, the square of the hypotenuse side is equal to the sum of the squares of the other two sides, according to Pythagoras's Theorem. The Pythagorean Theorem demonstrates how the side lengths of a right triangle can be calculated from the sum of the areas of three intersecting squares. This theorem is a very helpful tool that serves as the foundation for more intricate trigonometry theories like the Pythagorean theorem's opposite.
Here,
We can prove this by Pythagoras theorem,
b²+p²=h²
b=39 mm
p=37 mm
h=56 mm
=39²+37²
=2,890
56²=3,136
As 2890≠3136,
The triangle is not a right triangle. The triangle with sides of 37, 39, and 56 millimeters is not a right triangle according to Pythagoras' theorem because the theorem is incorrect in this case.
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