The equation in the standard form of a parabola is y = -3x² - 7x - 2
What is the standard form of a parabola?
Another equation that, when graphed, produces a parabola is one written in standard form. Like the letters in the vertex form equation, each letter in the standard form equation provides a nugget of knowledge about the parabola.
Here, we have
The standard equation of a parabola is
y = ax² + bx + c
Substitute the given values in this equation
When x = - 3 and y = -8
-8 = a (-3)² + b (-3) + c
-8 = 9a - 3b + c …. (1)
When x = 0 and y = - 2
-2 = a (0)² + b (0) + c
c = -2....(2)
When x = 2 and y = -28
-28 = a (2)² + b (2) + c
-28 = 4a + 2b + c …. (3)
Equations (1) and (3) can be written as
9a - 3b + c = -8 …. (4)
4a + 2b + c = -28 …. (5)
Multiply equation (4) by 2 and equation (5) by 3 to eliminate 'b'
18a - 6b + 2c = -16
12a + 6b + 3c = -84
Subtracting these equations
30a + 5c = -100
Substitute the value of 'c' here
30a + 5(-2) = -100
30a = -100 + 10
30a = -90
a = -3
Substitute the value of a and c in equation (1)
-8 = 9a - 3b + c
-8 = -27 - 3b -2
-6 = -27 - 3b
3b = -21
b = -7
Here the value of a = -3, b = -7, and c = -2.
Hence, the equation in the standard form of a parabola is y = -3x² - 7x - 2
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The function f(x) = -2(4)²+1 +140 represents the number of tokens a child has x hours after arriving at an arcade.
What is the practical domain and range of the function?
Enter your answer by filling in the boxes to correctly complete the statements. If necessary, round to the nearest hundredth.
The practical domain of the situation is ?
The practical range of the situation is ?
Find the 36th term.
5, 8, 11, 14, 17, ...
36th term = [?
Answer:
110
Step-by-step explanation:
nth term = 3n + 2
3 (36) + 2
108 + 2 = 110
Answer:
The 36th term in the sequence is 104.
Here's how to find it:
- Start with the first number in the sequence: 5.
- Add the common difference, which is 3, to get the second number in the sequence: 8.
- Add the common difference to the second number to get the third number: 11.
- Continue adding the common difference to each subsequent number to find the next term in the sequence.
- The 36th term is three less than 37 times the common difference added to the first term.
- Using that formula, we can calculate the 36th term as: 5 + (36 - 1) * 3 = 5 + 105 = 110.
- Therefore, the 36th term in the sequence is 104.
Given the points P (3, 5) and Q (-5, 7) on the cartesian plane such that R (x, y) is
the midpoint of PQ, find the equation of the line that passes through R and
perpendicular
to PQ.
Answer:
-22=22
Step-by-step explanation:
3,5-5,7=
-22/22
The equation of the line passing through R and PQ is 4(y - 6) = -x - 1/2.
To find the equation of the line passing through the midpoint R and the points P and Q, we first need to find the coordinates of the midpoint R. The midpoint coordinates can be found by taking the average of the x-coordinates and the average of the y-coordinates of P and Q.
The x-coordinate of the midpoint R is (3 + (-5)) / 2 = -1/2.
The y-coordinate of the midpoint R is (5 + 7) / 2 = 6.
So, the coordinates of the midpoint R are (-1/2, 6).
Next, we can use the two-point form of the equation of a line, which states that the equation of the line passing through points (x₁, y₁) and (x₂, y₂) is given by:
(y - y₁) = (y₂ - y₁) / (x₂ - x₁) \(\times\) (x - x₁)
Substituting the coordinates of R (-1/2, 6) and P (3, 5) into the equation, we have:
(y - 6) = (7 - 5) / (-5 - 3) \(\times\)(x - (-1/2))
Simplifying the equation:
(y - 6) = (2 / -8) \(\times\)(x + 1/2)
(y - 6) = -1/4 \(\times\)(x + 1/2)
4(y - 6) = -x - 1/2
Therefore, the equation of the line passing through R and PQ is 4(y - 6) = -x - 1/2.
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The probability that Maria succeeds at any given free-throw is
75
%
75%75, percent. She was curious how many free-throws she can expect to succeed in a sample of
10
1010 free-throws.
She simulated
25
2525 samples of
10
1010 free-throws where each free-throw had a
0.75
0.750, point, 75 probability of being a success.
Maria counted how many free-throws were successes in each simulated sample. Here are her results:
A dot plot for number of free-throw success has a scale from 5 to 10. The number of dots for each is as follows. 5, 0. 6, 5. 7, 8. 8, 6. 9, 5. 10, 1.
5
5
6
6
7
7
8
8
9
9
10
10# of free-throw successes
Use her results to estimate the probability that she succeeds at fewer than
7
77 free-throws in a sample of
10
1010 free-throws.
Give your answer as either a fraction or a decimal.
P
(
fewer than
7
successes
)
≈
P(fewer than 7 successes)≈
The answer is either 0.2 as a decimal or 1/5 as a fraction.
What is probability?Probability is a measure of the likelihood of an event occurring, expressed as a number between 0 and 1, with 0 indicating impossibility and 1 indicating certainty.
To estimate the probability that Maria succeeds at fewer than 7 free-throws in a sample of 10, we need to sum up the number of successful free-throws in each simulated sample that are less than 7, and then divide by the total number of simulated samples.
From the dot plot, we can see that there are 5 simulated samples with fewer than 7 successful free-throws.
Therefore, the estimated probability that Maria succeeds at fewer than 7 free-throws in a sample of 10 is:
P(fewer than 7 successes) ≈ 5/25 ≈ 0.2
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Evaluate s - t if s = 1/4 and t = -1.75. Write your answer in simplest form.
The value of s - t is 2.
It is given in the question that:-
s = 1/4 and,
t = -1.75
We can convert the decimal form of t in the fractional form.
-1(3/4) = -7/4
Hence, according to the data given in the question we can write,
s - t = (1/4)-(-7/4) = (1+7)/4 = 8/4 = 2.
Decimal
In Algebra, decimals are one of the types of numbers, which has a whole number and the fractional part separated by a decimal point. The dot present between the whole number and fractions part is called the decimal point. For example, 34.5 is a decimal number.
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Christie makes changes to her budget at the end of every month. What is her reason for doing this in terms of smart financial planning?
A.
She keeps changing her mind about her goals.
B.
She is reviewing her goals and aligning the budget to work toward them.
C.
Her needs keep changing, so she changes her monthly budget.
D.
She realizes that her budget is tightly aligned to her goals.
The most appropriate reason for Christie making changes to her budget at the end of every month in terms of smart financial planning is B. She is reviewing her goals and aligning the budget to work toward them.Option B is correct.
Smart financial planning involves regularly evaluating and adjusting one's budget to ensure that it reflects their financial goals and current circumstances. By reviewing her goals, Christie can assess if her budget is still aligned with those goals and make any necessary changes to stay on track.
Life circumstances, such as changes in income, expenses, or financial priorities, may warrant adjustments to the budget. Christie recognizes that her needs may change over time, and by modifying her monthly budget, she can ensure that her financial resources are allocated appropriately to meet her evolving goals.
Regularly revisiting and modifying the budget allows Christie to adapt her financial plans, optimize her spending, and make informed decisions to achieve her financial objectives. Option B is correct.
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Help I’m stupid and don’t know how to do this
Answer:
y = x/w
Step-by-step explanation:
1) We have to isolate y
2) An easy way to do this is to switch the places of y and w since we are just solving for y
3) Therefore, the answer is y = x/w
Hope this helps!
Can someone help me please? ASAP
Answer:
triangle XYZ is similar to triangle RPQ
scale factor = 2/5
Step-by-step explanation:
Angles X and R are given as congruent.
Angles Z and Q are right angles, so they are congruent.
Then, angles Y and P must be congruent.
The similarity statement is
triangle XYZ is similar to triangle RPQ
To find the scale factor, divide the length of a side of the image by the length of the corresponding side in the original.
10/25 = 2/5
The scale factor is 2/5.
(Pls help me ASAP i will give brainliest!! Also, pls write at least 3 sentences to explain your reasoning :) )
12,400 x one and one fifth = ________. Will the product of this equation be less than or greater than 12,400? Explain your reasoning.
Answer:
the answer is 14,880 and its bigger :D 14880>12400
Step-by-step explanation:
Answer:
14880
Step-by-step explanation: I think that it would be greater to me because 14 is bigger than 12.
How many meters are in 214 cm
Use the following function rule to find f(-7).
f(x) = 9x - 7
O 70
O-56
0 -70
56
How could Brent use a rectangle to model the factors of x2 – 7x + 6?
He could draw a diagram of a rectangle with dimensions x – 3 and x – 4 and then show the area is equivalent to the sum of x2, –3x, –4x, and half of 12.
He could draw a diagram of a rectangle with dimensions x + 7 and x – 1 and then show the area is equivalent to the sum of x2, 7x, –x, and 6.
He could draw a diagram of a rectangle with dimensions x – 1 and x – 6 and then show the area is equivalent to the sum of x2, –x, –6x, and 6.
He could draw a diagram of a rectangle with dimensions x – 4 and x + 3 and then show the area is equivalent to the sum of x2, –4x, 3x, and half of –12.
The true statement is (c) that He could draw a diagram of a rectangle with dimensions x – 1 and x – 6 and then show the area is equivalent to the sum of x^2, –x, –6x, and 6.
What is factorization?factorization is the method of breaking a number into smaller numbers that multiplied together will give that original form.
The expression is given as:
\(x^{2} -7x + 6\)
Expand;
\(x^{2} -6x - x +6\)
Factorize;
x(x-1) - 6 (x- 1)
Factor out x - 6
(x - 6) (x- 1)
This means that the factors of \(x^{2} -7x + 6\) are x - 1 and x - 6
Hence, the true statement is (c) that He could draw a diagram of a rectangle with dimensions x – 1 and x – 6 and then show the area is equivalent to the sum of x^2, –x, –6x, and 6.
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Answer: Answer is C
Step-by-step explanation:
matatila female drink 1/2 litres of milk every day during this month of September how many litres is this all together
Answer:
15 litres
Step-by-step explanation:
(1/2 litre/day)(30 days) = 15 litres
__
Multiply rate by time to get quantity.
what is -5x^2+7x+1 from 8x^2+x-10
Answer:
13x^2 - 6x -11
Step-by-step explanation:
Need help rn will give brainlyest if correct answer with explaining
unit ratio
Answer: The cost per bag is $27
Step-by-step explanation:
Divide 135 by 5 = 27
Unit ratio means that if you know the rate per unit, you can calculate the cost by multiplying the constant rate by the number of units. In this question, the rate is $27 and the unit is the bag.
The ratio looks like
1:27 as 2:54 as 3:81 as 4:108 as 5:135
They are all equivalent to 1/27
y = 27x is another way of writing an equation for this ratio.
Question 3. Instructions are below for each part
Since then, it has spread to other rivers, colonized them, clogged the water intake pipes, and competed with local species for food. Zebra mussels are the method for removing a lot of plankton from the water column.
Here, we have,
The Caspian Sea in Asia is where zebra mussels, or Driessen polymorph, are found naturally.
They arrived in the Great Lakes region in the late 1980s via ballast water from a transatlantic ship.
The Great Lakes, Mississippi, Tennessee, Hudson, and Ohio river basins were all overrun by these mussels within ten years.
The lake's brilliant blue hue is a result of Tahoe's clean air and water.
There is more to this phenomenon than just the fact that Lake Tahoe's surface reflects the sky, which contributes to its blue color.
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complete question:
As you respond to Part A, Part B, and Part C, follow the directions below.
Address all of the instructions in each prompt.
Use evidence from the information provided and your own knowledge of science to support your responses.
Part A
Describe one way scientists near Lake Tahoe can detect if the lake has been impacted by zebra mussels.
find the value of k if it is known that the line y=kx goes through the point B(-30,3)
Answer:
k = -0.1
Step-by-step explanation:
An ordered pair is in the form (x,y) We can use the x and y from the point (-30,3) to find k
y = kx We will replace x with -30 and y with 3
3 = (-30)k divide both sides by -30
-0.1 = k or \(\frac{-1}{10}\) in the fraction form
simplify -3xy-2(x+y)-4y+xy
Answer: -2xy - 8y
Step-by-step explanation:
-3xy-2(x+y)-4y+xy
-3xy - 2x -2y - 4y + xy
-2xy - 2x - 2y - 4y
-2xy - 8y
Write an inequality for the situation
No fewer than 5 people, p, must ride in the car.
An inequality for the situation "No fewer than 5 people, p, must ride in the car." is p ≥ 5.
What is an inequality?In Mathematics, an inequality simply refers to a mathematical relation that is typically used for comparing two (2) or more numerical data and variables in an algebraic equation based on any of the following inequality symbols:
Less than (<).Greater than (>).Greater than or equal to (≥).Less than or equal to (≤).Note: No fewer than simply means at least and greater than or equal to (≥).
Next, we would translate the word problem into an algebraic expression as follows;
No fewer than 5 people ⇒ p ≥ 5.
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Subtract and show work.
Answer:
\(31y^{3} -28y^{2}\)+35y
Step-by-step explanation:
put in a new
A rectangular garage is 11 yards long and 5 yards wide. It costs $2.00 per square yard
concrete floor. How much would it cost to put a new concrete floor in the garage?
Answer:
$110
Step-by-step explanation:
The first step would be to multiply 11 and 5 to get the result of 55.
Then, you would multiply 55 by whatever the cost per square yard is, which in this case is $2.
Finally after multiplying 55 and 2 you would get the answer of $110.
Hope this helped! Have a great day! :)
I WILL GIVE 20 POINTS TO THOSE WHO ANSWER THIS QUESTION RIGHT NOOOO SCAMS AND EXPLAIN WHY THAT IS THE ANSWER
Answer:
32 m^2
Step-by-step explanation:
Quite easy. The altitude of the triangle is 8m. The base of the triangle is 2 + 6. The base is 8 meters and the height of the triangle is 8 meters. The area ofa triangle is base * height divded by 2.
(8 * 8)/2 = 32 sqaure meters
Mark as brainliest if it helped.
Answer:
32
Step-by-step explanation:
8*8/2
64/2
32
BRAINLIEST IF CORRECT
A person is shopping for cereal at a grocery store. Which of the following is an
input for the scenario?
Number of boxes of cereal purchased
Brand of cereal
Total cost of the cereal
Cost of one box of cereal
Answer:
The price of the cereal boxes
Step-by-step explanation:
Find the missing angle:
twenty-eight divided by s
p plus fifty-one
DQ2 Do all linear transformations have a matrix representation? If so, what theorem establishes this? If not, provide a counter-example
Yes, This is established by the Rank-Nullity Theorem, A counter-example would be a transformation that is not linear.
Yes, all linear transformations have a matrix representation. The theorem that establishes this is the Matrix Representation Theorem. This theorem states that given a linear transformation T : V → W where V and W are vector spaces over a field F, then there is a unique matrix A such that T(v) = Av for any v in V. This theorem proves that any linear transformation can be represented by a matrix.
A counter-example of a linear transformation that does not have a matrix representation is a transformation that maps a vector in one vector space to a vector in a different vector space. For example, if V is a vector space over the field F, and W is a vector space over another field K, then the linear transformation T : V → W does not have a matrix representation since the size of the matrix would need to be different for each vector in the different vector spaces.
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A culture started with 6000 becteria. after 4 hours it grew to 6600 becteria. Predict how many bacteria will be present after 10 hours. Round your answer to the nearest whole number. p=ae^kt
Answer:
7614
Step-by-step explanation:
The exponential growth of the bacteria culture can be modeled by the equation ...
p = a·b^(t/c)
where 'a' is the initial population, 'b' is the growth factor, and 'c' is the period over which that growth factor applies.
__
modelIn the given scenario, we have ...
a = 6000 bacteriab = 6600/6000 = 1.1 . . . . growth factorc = 4 hoursSo, our model is ...
p = 6000·1.1^(t/4)
__
applicationAfter 10 hours, the population is predicted to be ...
p = 6000·1.1^(10/4) ≈ 7614
We predict 7614 bacteria will be present after 10 hours.
__
Additional comment
If we compare the form we used to the one suggested in the proglem statement, we see
p = 6000·1.1^(t/4)p = 6000·e^(kt)For the bases of the exponential term to be the same, we must have ...
1.1^(t/4) = e^(kt)
(1.1^(1/4))^t = (e^k)^t . . . . . factor t from the exponent
1.1^(1/4) = e^k . . . . . . . match the bases
k = ln(1.1)/4 . . . . . take natural logs
k ≈ 0.0238275
and the equation becomes ...
p = 6000·e^(0.0238275t)
__
In terms of 'a', 'b', and 'c' used above, we find ...
k = ln(b)/c
The fountain at the Palace of Versailles in France is circular in shape. An architect from New York replicates the design of this fountain, but enlarges the radius of the fountain using a scale of 1 : 4. The area of the fountain in New York is 1,600π square yards. What is the area, in square yards, of the original fountain at the Palace of Versailles? Leave your answer in terms of π.
The area of the original fountain was 16π square yards at the Palace of Versailles due to the radius of the fountain on a scale of 1 : 4.
What is the area of the circle?The area of the circle is equal to the product of the square of the radius of the circle and pi.
A = πr²
where 'r' is the radius of the circle
The radius of the fountain using a scale of 1 : 4 in New York
The area of the fountain in New York is 1,600π square yards.
To determine the area of the original fountain at the Palace of Versailles
We can write this as a ratio as
A₁ : A₂ = πr² : π(4r)²
A₁ : 1,600π = πr² : π(4r)²
A₁ / 1,600π = πr² / π(4r)²
A₁ = (πr²/ π 16r²)(1,600π )
A₁ = 1,600π/16
A₁ = 16π square yards
Therefore, the area of the original fountain was 16π square yards at the Palace of Versailles.
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PLEASE HELP ME ASAP!!!! I WILL GOVE BRAINLIEST!!!
Answer:
Step-by-step explanation:
its the last one
2. Angle POQ is halfway between 0 radians and angle POR. What is the measure in RADIANS of angle POQ?
The measure in radians of angle POQ is given as follows:
π/4 radians.
How to obtain the measure of angle POQ?The measure of angle POQ is obtained applying the proportions in the context of the problem.
Angle POR is one fourth of the unit circle, which is of 360º, hence it's measure is given as follows:
POR = 0.25 x 360
POR = 90º.
Angle POQ is halfway between 0 radians and angle POR, hence it's measure is given as follows:
POQ = (0 + 90)/2 = 45º.
180º is equivalent to π radians, and 180/45 = 4, hence the measure in radians of angle POQ is given as follows:
π/4 radians.
Missing InformationThe diagram is given by the image presented at the end of the answer.
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