9514 1404 393
Answer:
a) y = -7/640x^2 +7/4x
b) y = -7/640(x -80)^2 +70
Step-by-step explanation:
a) Given the equation in standard form:
y = ax^2 +bx +c
we can use the points (0, 0), (80, 70), and (160, 0) to find the values of a, b, c.
a·0 +b·0 +c = 0
a·80^2 +b·80 +c = 70
a·160^2 +b·160 +c = 0
The first equation tells us that c=0, so we can write a reduced matrix for the last two equations. The augmented matrix is ...
[tex]\left[\begin{array}{cc|c}6400&80&70\\25600&160&0\end{array}\right][/tex]
A matrix solver finds the solution to be ...
a = -0.0109375 = 7/640, b = 1.75 = 7/4
The standard-form equation for Money's path is ...
y = -7/640x^2 +7/4x
__
b) Factoring out -7/64, we have ...
y = -7/640(x^2 -160x)
adding and subtracting the square of the x-coefficient, we have ...
y = -7/640(x^2 -160x +6400) +70
y = -7/640(x -80)^2 +70
On mountainous terrain, a semi-truck travels 2 2__3miles on 1__2gallon of fuel . How many miles can the truck travel per gallon of fuel? Use drawings or equations to show your work .
please help asap :) will gift brainliest
Answer:
okay but it is a LOOP loop Left to a more important point is that the answer to this area is to be randomly in the project
Step-by-step explanation:
point
Answer:
c
Step-by-step explanation:
0.25 is the amount of rain that is falling, so that is the slope (0.25t)
2 is the y-int because it is the starting point. It was already there (+2)
so the equation is; 0.25t+2
May someone please help me?
Answer:
x=8°
y=29°
Step-by-step explanation:
vertically opposite angles are equal
so 5x+9°=y+20°
therefore 5x-y=11°
Alternate angles are equal
so 4x+17°=y+20°
therefore 4x-y=3°
equation 1....... 5x-y=11°
equation 2......4x-y=3°
using elimination method x=8°
y=29°
Jacob and Kerrie are trying to figure out how long they can live off their $84,670 savings if they spend $370 each month. They have each created an equation. Jacob's Equation Kerrie's Equation y = 84,670 + (370x) y = 84,670 − (370x) Which person has the correct equation to model this linear relationship?
A.Kerrie's equation is incorrect, because their spending will increase the amount of their savings. B.Kerrie's equation is correct, because their spending will be multiplied by the number of months and then subtracted from their savings. C.Jacob's equation is correct, because their spending will be multiplied by the number of months and then subtracted from their savings. D.Jacob's equation is incorrect, because their spending should be a fixed amount and should not be multiplied.
Answer:
B.)Kerrie's equation is correct because their spending will be multiplied by the number of months and then subtracted from their savings
Step-by-step explanation:
Given : Jacob and kerrie are trying to figure out how long they can live off their 84,670 savings if they spend 370 each month.
To Find: Which person has the correct equation to model this linear relationship?
Jacob's equation : y = 84,670+(370x).
Kerrie's equation : y=84,670-(370x).
Since they have 84670 in savings
They spend each month = 370
They spend in x months = 370x
So, spending this amount from saving they left with amount = 84,670-(370x)
Thus Kerrie's equation is correct .
Hence Option B is correct
B.)Kerrie's equation is correct because their spending will be multiplied by the number of months and then subtracted from their savings
hi remember me this is your answer :0
Answer:
the answer is B
Step-by-step explanation:
Find a unit rate: Joel ran 1500 meters in 6 minutes, 15 seconds.
Answer:
240 metres per minute
Step-by-step explanation:
1500 / 6.25 = 240
Noel Magee purchased a micro-cut shredder at a sale price of $179.99. The regular selling price is $199.99. He also purchased a photo-smart printer at 25% off the regular price of $499.99. A. What is the markdown on the shredder? B. What is the markdown on the printer?
Answer:
a) 10% off or $20 off
b) 25% off or $124.99 off
Step-by-step explanation:
In order to find the markdown on the shredder we simply need to divide the sale price by the original price. Once we have that we subtract that decimal from 1 and multiply by 100 to get the markdown percentage. We can also subtract the original price from the sales price to get the markdown dollar value.
179.99 / 199.99 = 0.899
(1 - 0.899) * 100 = 10%
199.99 - 179.99 = $20
Now, for the printer we are provided the markdown perentage so to find the markdown dollar value we need to divide the perentage by 100 to turn it into a decimal and multiply that decimal by the regular price of the printer. We can also subtract the markdown dollar value from the original price to get the sale price...
25% / 100 = 0.25
0.25 * 499.99 = 124.99
499.99 - 124.99 = $375
Which graph represents a linear function?
A coordinate plane is shown with a line passing through the y-axis at 7.5 and the x-axis at 12
A coordinate plane is shown with a line that starts to the left of the y-axis, passing through -1 comma 10, then curving right to pass through the y-axis 7, then curving down to pass through the x-axis at 2
A coordinate plane is shown with a parabola opening downward in an upside-down U shape. The base of the parabola sits at the origin and continues downward on both sides of the y-axis
A coordinate plane is shown. A wavy line begins along the x-axis and moves in intervals downward and back up, dipping down to y equals negative 1 and up to y equals 1.
Answer:
First Graph Description
Step-by-step explanation:
A linear function shows as a straight line.
The first graph description describes a straight line.
The second, third, and fourth graph description says that either the line is curved, or that it is a parabola. A parabola is not linear.
A coordinate plane is shown with a line that starts to the left of the y-axis, passing through -1 comma 10, then curving right to pass through the y-axis 7, then curving down to pass through the x-axis at 2
A coordinate plane is shown with a parabola opening downward in an upside-down U shape. The base of the parabola sits at the origin and continues downward on both sides of the y-axis
A coordinate plane is shown. A wavy line begins along the x-axis and moves in intervals downward and back up, dipping down to y equals negative 1 and up to y equals 1.
Hope this helps.
Write the simplest polynomial function for each set of zeros
Zeros=4, 7 ,1
PLEASE HELP
Answer:
x^3-12x^2+39x-28
Step-by-step explanation:
(x-4)(x-7)(x-1)
(x^2-4x-7x+28)(x-1)
(x^2-11x+28)(x-1)
x^3-11x^2+28x-x^2+11x-28
x^3-11x^2-x^2+28x+11x-28
x^3-12x^2+39x-28
how many fluid ounces are in 3 quarts?
Answer: 96 fluid ounces
Step-by-step explanation:
1 quart = 32 fluid ounces
32 x 3 = 96
1 x 3 = 3
There are 96 fluid ounces in 3 quarts.
Hope this helps!
I need help pls go to my page and answer the finance question it a lot of points.
DON'T ANSWER SOMETHING IGNORANT
Which table shows values representing a cubic function? Table A Table B Table C Table D
Answer: C
Step-by-step explanation:
On edge
Identify each value of x that makes 11 + 2x < 13
Answer:
x < 1
Step-by-step explanation:
This is the answer because:
1) 11 + 2 = 13 and 13 is not less than 13, it is equal to 13. Therefore, x has to equal anything less than 1 because then only inequality statement will be true.
Therefore, the answer is x < 1.
Hope this helps! :D
The value of x that makes 11 + 2x < 13 is x < 1
Given:
11 + 2x < 13
< means less than
11 + 2x < 13
Subtract 11 from both sides11 + 2x - 11 < 13 - 11
2x < 2
divide both sides by 2x < 2/2
x < 1
x less than 1
Therefore, the value of x that makes 11 + 2x < 13 is x < 1
Learn more about inequality:
https://brainly.com/question/18881247
What is the constant of proportionality for the relationship represented by this graph?
Answer: (5,11)
Step-by-step explanation:
Answer:
k = [tex]\frac{1}{2}[/tex]
Step-by-step explanation:
The equation of proportionality is
y = kx ← k is the constant of proportionality
To find k use any coordinate point lying on the graph
Using (12, 6 ), then
6 = 12k ( divide both sides by 12 )
k = [tex]\frac{6}{12}[/tex] = [tex]\frac{1}{2}[/tex]
John played 8 games of basketball this season. In his first 2 games, he averaged 5 more points scored than he did in the next 6 games. If he scored 90 points during the 8 game stretch, then how many points did he score in the first two games of the season, added together?
HELP FASTTTT I need the work for this problem
Answer:
30Step-by-step explanation:
Let the average score in the last 6 games be x, then average score in first 2 games is x + 5
Considering the total score of 90 solve for x the equation:
2(x + 5) + 6x = 902x + 10 + 6x = 908x = 80x = 10In the first 2 games John's score was:
2(10 + 5) = 30Fraction math problems, have lots tonight need help for some
Answer:
5
Step-by-step explanation:
Describe the error?
38 + 7k = 8k + 12
-8k -8k
38 - 1k = 12
-38 -38
-1k = -26
/-1 /-1
K = 26
Answer:
Step-by-step explanation:
K=26
In ΔNOP, the measure of ∠P=90°, NP = 60, ON = 61, and PO = 11. What ratio represents the cosine of ∠N?
Answer:
60/61
Step-by-step explanation:
Slope of line a is ½. What is the equation of a line that is parallel to line a? Y+½x=2 -2x+y+2=0 2x-2=y -½x+y-2=0
Answer:
The equation of a line that is parallel to line a is y=½x + 2, or what is the same -½x+y-2=0
Step-by-step explanation:
A line is a polynomial function of the first degree that has the following form:
y = m * x + b
where m is the slope of the line and b is the intercept with the Y axis. The slope is the inclination of the line with respect to the abscissa axis.
In this case you know that the slope of line a is ½.
Parallel lines are two or more lines in a plane that never intersect. Two lines are parallel if they have the same slope and different y-intercepts.
You have:
y+½x=2 → y= -½x +2-2x+y+2=0 → y=2x -22x-2=y -½x+y-2=0 → y=½x + 2The line that has the same slope as line a is the last one, so the equation of a line that is parallel to line a is y=½x + 2, or what is the same -½x+y-2=0
I ant get any wrong please help
Answer:
b
Step-by-step explanation:
ab(a²-b²)
can somebody solve this for me.
Answer:
a³b - ab³
Step-by-step explanation:
Given
ab(a² - b²) ← distribute parenthesis by ab
= a³b - ab³
ABCD is a rectangle. Find the mCED
Answer:8.5...
Step-by-step explanation:
select the correct answer
Meghan went out to lunch. Her food costs $11.62. A 6% sales tax was
added, so how much was her total bill?
Answer:
$12.31
Step-by-step explanation:
11.62 divided by 2 =0.69
$11.62+$0.69=12.31
Whose puppy weighed the most when the person got it? How much did it weigh? Part c
Answer:
Olivia's puppy, it weighed 5 pounds.
Step-by-step explanation:
Pleaseeeee helpppp !!!!!!!! Will mark Brianliest !!!!!!!!!!!!!
Answer:
so this uses proportions.
you need to find the side BF which is proportional to the side BF.
You do:
9/6=x/42
and cross multiply
9*42=6*x
378=6x
divide by 6 on both sides
x=63
the answer is 63
Answer:
These are similar triangles.
By changing the length of the base of the corresponding triangle, the 3 interior angles of this triangle remain equal to the original
Therefore, if these triangles are similar, their corresponding sides must give equal ratios to each other:
This means that BF/FE = BC/CD=FC/ED
The total length of line segment BD=BC+CD; BC=6, CD=42; BD=6+42, BD=48
BE=BF+FE; BE=9+?
if BF/FE=BC/CD then 9/BE=6/42; 6/42=3/21 or 1/7. 9/BE=1/7; 1/7=9/BE
1x9=9, 7x9=63
63=BE
Step-by-step explanation:
Write an equation in slope-intercept form that represents the data. Show ALL work.
1.)
0
1
2
Sales per
day(x)
Daily pay ($), y
100
105
110
115
11212
I
Equation
Answer:
y = 5x + 100
Step-by-step explanation:
Using the x and corresponding y values from the given table.
Let's use the coordinate (0, 100) and (1, 105)
The equation in slope intercept form is expressed as y = mx+c
m is the slope
c is the y-intercept
Slope m = y2-y1/x2-x1
m = 105-100/1-0
m = 5/1
m =5
Get the y intercept
Substitute the slope m = 5 and any point say (0, 100) into the equation
y = mx+c
100 = 5(0) + c
100 = c
c = 100
Get the required equation;
y = mx+c
y = 5x + 100
Hence the equation in slope-intercept form that represents the data is expressed as y = 5x + 100
i will give brainliest if right!
Natalia is writing a recursive formula to represent the sequence.
8, 12, 18, 27, ...
What value should she use as the common ratio in the formula?
1/4, 2/3, 3/2, 4/1
Answer:
The answer to your equation would be 1.5.
Step-by-step explanation:
The common ratio if there exists one can be found by choosing a term and dividing by its previous term
So does 12/8=18/12=27/18? Put each into the calculator. If they are equal fractions then this sequence is geometric and has a common ratio.
Each of the fractions are equal to 1.5.
Therefore the commom ratio is 1.5.
On Monday a toy store sold for race cars on Tuesday it’s sold eight race cars on Wednesday it’s sold 16 race cars suppose this pattern continues how many race cars will be sold on Friday describe a room down solve
Answer:
64 cars
Step-by-step explanation:
because he is multipling by 2
Monday 4
Tuesday 8
Wensday 16
Thursday 32
Friday 64
Answer: On Friday the toy store would have sold 256 race cars.
Step-by-step explanation: The pattern is x2 each number.
M: 4
T: 8
W: 16
T: 32
W: 64
TH: 128
F: 256
Ed wants to build a small 800 square foot cabin on a lot that is 80 feet deep. If the building sideyard setbacks are 20 feet and the cabin is 20 feet wide, what is the square footage of the lot
Answer:
4800 ft²
Step-by-step explanation:
Given that :
Area of cabin = 800 ft²
Width of cabin = 20 feets
Side yard setback of building = 20 feets
Depth of lot = 80 feets
The cabin is a rectangle :
Area of rectangle = Length * Width
800 = length * 20
Length = 800 / 20 = 40 feets
Hence,
Width of lot = side yard + Width of cabin = (20 + 20) = 40 feets
Length of lot = depth +. Length of cabin = (80 + 40) = 120 feets
Area of lot = Length of lot * width of lot
Area of lot = 120 ft * 40 ft = 4800 ft²
can someone find the equation plz and solve it.
i will give brainliest i need u guys to save my math grade lol :(
Answer:
$2 per Chicken and $9 per Duck
Step-by-step explanation:
the equations for the problem are as follows (x = the value of chickens and y = the value of ducks):
5x + 3y = 55
4x + 3y = 53
if you subtract the equations you would get x = 2, which means the chickens are worth $2 each
If we re-input the x that we now know as 2 and solve one of the equations for y, we will get y = 9
Answer:
If you need the cost of each duck and chicken it would be around 6 dollars per duck or chicken.
I'm not completely sure tho sorry.