Let f(x) = ax ³ + bx ² + cx + d.
The graph of f(x) passes through (4, -22) and (3, -26), which means f (4) = -22 and f (3) = -26, so that
64a + 16b + 4c + d = -22
27a + 9b + 3c + d = -26
When the question says it has tangents at some point, I take that to mean the slope of the tangent line at that point is the given number. So f ' (4) = 11 and f ' (3) = -2. We have
f '(x) = 3ax ²+ 2bx + c
so that
48a + 8b + c = 11
27a + 6b + c = -2
Solve the system:
• Eliminate d :
(64a + 16b + 4c + d) - (27a + 9b + 3c + d) = -22 - (-26)
→ 37a + 7b + c = 4
• Eliminate c :
(48a + 8b + c) - (27a + 6b + c) = 11 - (-2)
→ 21a + 2b = 13
(48a + 8b + c) - (37a + 7b + c) = 11 - 4
→ 11a + b = 7
• Eliminate b, then solve for a and the other variables:
(21a + 2b) - 2 (11a + b) = 13 - 2 (7)
-a = -1
a = 1 → b = -4 → c = -5 → d = -2
Then
f(x) = x ³ - 4x ² - 5x - 2
The cost of staying in a hotel is given by the formula C=50d+20, where C is the cost in £ and d is the number of days a person stays. Find the cost of staying for:
a) 6 days
b) 2 weeks
c) If the cost is 120 then how many days the person can stay
Answer:
a) £320
b) £720
c) 2 days
Step-by-step explanation:
The question is all about inputting values and finding a result or rearranging and finding a result.
a) d = 6. C = 50(6)+20 = 320
b) d = 2x7 (7 days a week) C = 50(2x7) + 20 = 720
c) C = 120 ... 120 = 50d+20
100 =50d d = 100/50 = 2
Find the measure of each missing angle.
9514 1404 393
Answer:
35°145°55°125°55°Step-by-step explanation:
The right triangles are similar, so angle 1 is congruent to the given angle, and angles 3 and 5 are complements of that.
Angles 2 and 4 are the supplements of angles 1 and 5, respectively.
∠1 = 35°
∠2 = 180° -35° = 145°
∠3 = ∠5 = 90° -35° = 55°
∠4 = 180° -55° = 125°
Let's say a student scored 33 on a math achievement test for which scores are normally distributed with mean
43 and standard deviation 10.
What proportion of students finished worse than her?
Answer:
15.87%
Step-by-step explanation:
We are given;
x¯ = 33
μ = 43
σ = 10
Let's first find the z-score from the formula;
z = (x¯ - μ)/σ
Thus;
z = (33 - 43)/10
z = -10/10
z = -1
From the table attached the p-value at z = -1 is p = 0.15866 ≈ 0.1587 = 15.87%
Thus, proportion of students finished worse than her is 15.87%
Help please! Could you explain it too?
Answer:
a. Not proportional
b. Proportional;
k = ⅞
Step-by-step explanation:
A proportional relationship is usually represented in the format, y = kx. k here represents constant of proportionality. This shows that x and y are directly proportional.
a. y = -2x + 9 is not a proportional equation.
b. y = ⅞x is a proportional equation.
Constant of proportionality: k = ⅞
Forms of Quadratic equations
Please help me out
Standard form:
1. y = x² - 4x - 5
2. y = x² - 2x - 8
3. y = x² + 4x - 21
4. y = x² + 12x + 20
5. y = x² + 8x + 12
6. y = x² + 4x + 3
7. y = x² - 8x + 7
8. y = x² - 6x + 8
9. y = x² + 10x - 11
Vertex form:
1. (x - 2)² - 9
2. ----
3. (x + 2)² - 25
4. ----
5. (x + 4)² - 4
6. (x + 2)² - 1
7. ----
8. (x - 3)² - 1
9. (x + 5)² - 36
Factored form
1. (x + 1) (x - 5)
2. (x + 2) (x - 4)
3. (x - 3) (x + 7)
4. (x + 10) (x + 2)
5. (x + 6) (x + 2)
6. (x + 3) (x + 1)
7. (x - 7) (x - 1)
8. (x - 2) (x - 4)
9. (x + 11) (x - 1)
Questions
1. Factored form
2. Factored form
3. Vertex form
4. Standard form
5. Standard form
6. Vertex form
NB: Finally finished ^-^ I hope all the answers to the questions are correct.
Graph the system of equations:
y = -2x + 5
- 3x + 3y = -12
What would this graph look like? The answer plots at (3,-1) but how would the graph lead up to that point?
Answer:
I posted a picture on the graph and how the two point intercept eachother
Step-by-step explanation:
Hope this Helped
HELP!!!(will give brainliest)
Answer:
B
Step-by-step explanation:
It is either 33 or 66 inches but I think it is B
A ball is kicked straight up into the air from a height of 48ft with an initial velocity of 88 ft/s. After how many seconds does the ball hit the ground?
The time taken will be "0.5 seconds".
Newton's Law:According to the question,
Initial velocity, u = 88 ft/sHeight, h = 48 ftAcceleration due to gravity, g = 32 ft/s²By using Newton's equation,
→ [tex]s = ut+\frac{1}{2}gt^2[/tex]
Substituting the values,
[tex]48=88t+0.5\times 32\times t^2[/tex]
[tex]16t^2+886-48=0[/tex]
[tex]t = 0.5 \ seconds[/tex]
Thus the above solution is right.
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A home owner purchased the following items to repair a door one box of screws priced at $3.75 one tube of caulk priced at $3.99 two pieces of glass priced at $12.50 each what is the total price of dollars and cents The homeowner paid for these items
Answer: $20.24
Step-by-step explanation: add 3.75+3.99+12.50
What is an equation of the line thatpasses through the point (-1,-3) and is parallel to the line 4x-y=2?
Answer:
Explanation:
First, you put the equation into the standard “slope/intercept” form.
4x -y = 2 subtract 4x from both sides ; -y = -4x + 2 Multiply by -1 :
y = 4x - 2
In this standard form we see that the slope of the line (coefficient of x) is 4. ANY line parallel to this one must thus also have a slope of 4.
y = 4x - a (generic)
ANY other combination of slope multiples and constant terms will therefore also be lines parallel to this one. The one that passes through a specific point will simply have a different constant term.
We find this by putting our point value into the equation:
3 = 4(-2) + a ; 3 = -8 + a ; a = 11
Thus, our “parallel line equation” through the point (-2,3) is:
y = 4x + 11
Answer:
y = 4x + 1
Step-by-step explanation:
first put the equation 4x-y=2 into the form y = mx + b where m is the slope and b is the y-intercept (for example, y = 2x - 1 would have 2 is the slope and -1 is the y-intercept)
4x - y = 2
subtract 4x from both sides
-y = -4x + 2
multiply both sides by -1
y = 4x - 2
That means the slope of this line is 4.
Parallel lines always have the same slope, so the slope of the new line is also 4. You can again put the new equation into the form y = mx + b. You already know that the slope is 4, so y = 4x + b.
Next, you need to find b. You know that (-1, -3) is a solution, so if you plug x = -1 and y = -3 into the equation, it should be true.
You can put that into the equation to solve for b:
-3 = 4 * -1 + b
-3 = -4 + b
1 = b
This means the equation is y = 4x + 1
Maths-please help Factorise 3y+15
Answer:
3(y + 5)
Step-by-step explanation:
Factorization is a process which is like the opposite of expansion. It involves factoring out the common factors from the given terms.
Thus to factorize 3y + 15, we have to consider the common factor(s) of the two terms. The common factor is 3 because the two terms (i.e 3y and 15) are both divisible by 3 only.
So that:
3y + 15= 3([tex]\frac{3y}{3}[/tex] + [tex]\frac{15}{3}[/tex])
= 3(y + 5)
The outcome of the process is 3(y + 5).
18 divided by 89 X 6892 Multiplied by the 16th power to 7813
Answer:
ur dad lololol
Step-by-step explanation:
hehehehehehe
He can run 5 miles in 50 minutes what is the unit rate that he runs in one minute ?
Answer:
10 because
5 divide by 10 = 50
Step-by-step explanation:
give brainest or answer my question
do you have a microsoft account if you do the i can invite you in microsoft reward and maybe we can get microsoft 365
what is the area of this quadrilateral please help FAST!!!
C, 80 square feet.
Have a nice day!
Find the distance between the two points in simplest radical form.
(3, -8) and (-2,-1)
Mai's water bottle had 24 ounces in it. After she drank x ounces of water, there were 10 ounces left.
Select all the equations that represent this situation.
Answer:
24 - X = 10
Step-by-step explanation:
Given that Mai's water bottle had 24 ounces in it. After she drank x ounces of water, there were 10 ounces left, in order to determine the equation that represents this situation, the following reasoning has to be made:
Since the bottle has 24 ounces of liquid, that is its initial content, from which an amount X is subtracted, after which 10 ounces of water remain. That is, 24 - X = 10.
Thus, this equation is solved in the following way:
24 - X = 10
24 = 10 + X
24 - 10 = X
14 = X
jannete has 326 pennies, 64 nickles, and 15 dimes. if she has to exchange her coins for dollars how many dollars will she have ? how many cents will remain?
Answer:
She will have 7 dollars, with 96 cents remaining.
Step-by-step explanation:
326 pennies is $3.26
64 nickels is $3.20
15 dimes is $1.50
Add them all;
$3.26 + $3.20 + $1.50 = $7.96
She will have 7 dollars, with 96 cents remaining
Given the graphed function below, which of the following ordered pairs are
found on the inverse function?
A. (2, -11),(1,-8),(0,-5),(-1,-2).(-2, 1)
B. (11,-2), (8, -1), (5,0), (2,1),(-1,2)
C. (-11,2).(-8,1),(-5,0),(-2,-1), (1, -2)
D.(-2,-11).(-1,-8),(0,-5), (1, -2), (2, 1)
The option (B) (11, -2), (8, -1), (5, 0), (2, 1), and (-1, 2) is correct because the points will lie exactly lie on the inverse of a function.
What is a function?It is defined as a special type of relationship, and they have a predefined domain and range according to the function every value in the domain is related to exactly one value in the range.
We have a graph of a function shown in the picture.
Let's assume the points (2, 0) and (0, 5) lie on the line which is shown in the graph.
The linear function from these two points:
[tex]\rm y=\dfrac{\left(0-5\right)}{\left(2\right)}\left(x-2\right)[/tex]
[tex]\rm y=\dfrac{\left5\right}{\left2\right}\left(x-2\right)[/tex]
To find the inverse of a function interchange the value of x and y:
The inverse function:
[tex]\rm x=\dfrac{\left5\right}{\left2\right}\left(y-2\right)[/tex]
After plotting the points:
(11, -2), (8, -1), (5, 0), (2, 1), (-1, 2)
The points will lie exactly lie on the inverse of a function.
Thus, the option (B) (11, -2), (8, -1), (5, 0), (2, 1), and (-1, 2) is correct because the points will lie exactly lie on the inverse of a function.
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Which inequality is represented by the graph? 3 NI 5 6 4 OA. 21 - 5y 3
Answer:
a
Step-by-step explanation:
A person walks 1/7
mile in
1/21
hour.
The person's speed is
miles per hour. help me pls fast
Answer:
3 Miles per hour. (MPH)
Step-by-step explanation:
This would be 1/7 x 21 = 21/7 = 3
ABCD is a cyclic quadrilateral in which AB parallel to CD if angle D is equals to 70 degree find all the remaining angles
Answer:
angle a is 110
angle B is 110
angle C is 70
I need help! This is due in 30 minutes!!!
Answer:
Complementary
Step-by-step explanation:
You are correct.
Answer:
Complementary
Step-by-step explanation:
b + a = 90 degrees.
complementary is 2 angles that add up to 90 degrees
a 4kg ham cost $13/kg. Find the cost per pound . Round to the nearest hundred
Answer:
The cost per pound of the ham is $5.89.
Step-by-step explanation:
Given that a 4kg ham cost $13/kg, in order to find the cost per pound the following calculation has to be made:
1 kg = 2.20462 pounds
2.20462 = 13
1 = X
((1 x 13) / 2.20462) = X
13 / 2.20462 = X
5.89 = X
Therefore, the cost per pound of the ham is $5.89.
Help due now pleaseee
Answer:
d
Step-by-step explanation:
base² + Altitude² = Hypotenuse²
x² + 9² = 13²
x² + 81 = 169
x² = 169 - 81
x² = 88
x = [tex]\sqrt{88}[/tex]
[tex]x = \sqrt{2*2*2*11}=2\sqrt{2*11}\\\\x=2\sqrt{22}[/tex]
Answer:
option - d
Step-by-step explanation:
a^2 + b^2 = c^2
9^2 + b^2 = 13^2
81 +b^2 = 169
b^2 = 169 - 81 = 88
b= [tex]\sqrt{88}[/tex] = [tex]\sqrt{2 x 2 x2 x 11}[/tex] ( take the one doubling out )
[tex]\sqrt[2]{2 x 11 }[/tex] = [tex]\sqrt[2]{22}[/tex]
, 4), perp. to y=-2x - 4
Answer:
+1/2
Step-by-step explanation:
If the slope of the given line is -2, the slope of a line perpendicular to the given line is the negative reciprocal of -2, or +1/2.
Tony invests $3,000 dollars in an account earning 12% interest per year. How long will it take
him to make $3960 dollars in simple interest?
3 years
5 years
8 years
11 years
Answer: 11 years
Step-by-step explanation: 3960 divided 12%= 33,000 divided 3000=11
Answer: it will take 11 years
3- 8 + 4(3x + 3)
+2y
Thanks!!!
Answer:
7+12x+2y
Step-by-step explanation:
3-8+(12x + 12)+2y=
-5+(12x +12)+2y=
7+12x+2y
Answer:
Simplified, your answer should be 12x + 2y + 7
Step-by-step explanation:
Hope this helps! :)
Have a nice day! ♥
the difference of two number one of which is one third of the other is 18 find the number
Answer:
Most of the important things in the world have been accomplished by people who have kept on trying when there seemed to be no hope at all
Step-by-step explanation:
you can do it!!!
Which is the complete factorization of this expression?
-24x + 64
es =))
A)
8(2x - 8)
B)
-8(X + 8)
-8(3x - 8)
D)
-8(3x + 8)
Answer:
-8(3x-8)
Step-by-step explanation:
factor -8 out of -24x+64
Answer:
-8(3x-8)
Step-by-step explanation:
Each locker is shaped like a rectangular prism.
One locker has more storage space by how many more cubic inches (in3)?
Answer:
60*12*10-48*12*15=7200-8640=-1440
The red locker has more storage space by 1440 cubic inches.
Step-by-step explanation:
The red locker has more storage space by 1440 cubic inches.
We have given that,
Each locker is shaped like a rectangular prism.
What is the formula for the area of a rectangular prism?
The area of rectangular prism = 2(lb + bh + lh)
One locker has more storage space by how many more cubic inches
=60*12*10-48*12*15
=7200-8640
=-1440
The red locker has more storage space by 1440 cubic inches.
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