Answer:
3y = -5x + 8
Step-by-step explanation:
Point Slope Equation Of A Straight Line:
y - y1 = m(x - x1)
where m = slope of the line and (x1, y1) is any point on the line
Slope is given by rise/run
For any two point (x1, y1) and (x2, y2) on the line
rise = y2 - y1
and
run = x2 - x1
Given points (-2, 6) and (1, 1)
rise = 1 - 6 = -5
run = 1 - (-2) = 1 + 2 = 3
rise/run = m = -5/3
Equation using the point (1, 1) is
y - 1 = -5/3(x - 1)
y - 1 = -5/3x + 5/3
Multiply both sides by 3 to get
3(y - 1) = 3 x (-5/3)x + 3(5/3)
3y - 3 = -5x + 5
3y = -5x + 8
which best describes your ability determine best method for solving a system of linear equations
The best method for solving a system of linear equations is the substitution method.
What is a system of equations?An equation is an expression that shows the relationship between two or more numbers and variables. A system of equations is two or more equations that can be solved to get a unique solution. the power of the equation must be one degree.
We have been given the system of the equations as;
y = -2x + 2
y = 4x + -4
Thus, y = -2 x + 2 ........ equation number 1
y = 4 x - 4.............. equation number 2
Then substitute equation number 2 in equation number 1
4 x - 4 = -2 x + 2
4 x + 2 x = 2 +4
6 x = 6
so, x = 1
Now substitute x= 1 in equation number 2;
Therefore y =( 4 × 1) - 4
y = 4 - 4 = 0
For x = 1 and y = 0
Hence, the best method for solving a system of linear equations is the substitution method.
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The complete question is;
which best describes your ability to determine the best method for solving a system of linear equations. Then solve the system.
y = -2x + 2
y = 4x + -4
function c gives the cost,in dollars, of buying n apples. what does each expression or equation represent in this stiuation1.C(5)=4.502C(2)
1)
From the function given, the cost of 5 apples is $4.50
5 apples cost $4.50
Determine if it has a minimum of maximum and what that value is whilst also Identifying the domain and range
Hello!
First, let's rewrite the expression here:
[tex]f\mleft(x\mright)=-2x^2+12x-15[/tex]We will have to find the coefficients a, b and c:
• a ,= -2;
,• b ,= 12;
,• c ,= -15;
As we can see, coefficient a is negative. It means that the parabola will face downwards and have a maximum value.
We can obtain this point by using the two formulas below to calculate the coordinates (x, y) of this point, look:
[tex]\begin{gathered} X_V=\text{ }-\frac{b}{2\cdot a} \\ \\ Y_V=-\frac{b^2-4\cdot a\cdot c}{4\cdot a} \end{gathered}[/tex]As we know the coefficients, let's replace the values in the formulas:
Xv:
[tex]\begin{gathered} X_V=-\frac{b}{2\cdot a} \\ \\ X_V=-\frac{12}{2\cdot(-2)}=-\frac{12}{-4}=-(-3)=+3 \\ \\ X_V=3 \end{gathered}[/tex]Now let's find Yv:
[tex]\begin{gathered} Y_V=-\frac{b^2-4\cdot a\cdot c}{4\cdot a} \\ \\ Y_V=-\frac{12^2-4\cdot(-2)\cdot(-15)}{4\cdot(-2)}=-\frac{144-120}{-8}=-\frac{24}{-8}=-(-3)=+3 \\ \\ Y_V=3 \end{gathered}[/tex]Doing this, we obtained the coordinate of the maximum point (x, y) = (3, 3).
As it doesn't have any restrictions, the domain will be: [-∞, +∞].
[tex]-\infty\: We have one restriction in the range, do you remember which?The maximum value will be when y = 3, so the range is [-∞, 3].
Look at the graph of this function below:
Mina got a story book of 56 pages from her school library for 7 days. She did not want to complete the book immediately.. She planned to read the book in such a way that all her other activities were not disturbed and wanted to spend equal amount of time in reading. She did it successfully and returned the book on the specific day. How she must have planned her reading?
Please with explanation...
Mina must have planned to read 8 pages everyday.
To accomodate reading in her everyday life, without spending extra time and not disturbing other activities, Mina should read particular number of pages everyday. These pages should be enough to be completed in 7 days.
So, relating the number of pages and days -
Number of pages to be read each day = total number of pages ÷ number of days
Keep the values in relation -
Number of pages to be read each day = 56 ÷ 7
Performing division
Number of pages to be read each day = 8
Thus, to return the book on time Mina should have planned to read 8 pages everyday.
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First person to solve gets Brainliest!!!!
3. Select all expressions that are equivalent to (2n + 6)(n + 3)a. 2(n? + 6n +9)b. 2n? + 6n + 18c. 2n2 + 12n + 18d. 12n + 18e. 2(n + 3)(n + 3)f. 2(n + 3)?
Select all expressions that are equivalent to (2n + 6)(n + 3)
we have
(2n + 6)(n + 3)
apply distributive property
2n^2+6n+6n+18
2n^2+12n+18
Verify each option
option A
2(n^2 + 6n +9)=2n^2+12n+18 -------> is ok
option B
is not correct
option C
is correct
option D
is not correct
option E
2(n + 3)(n + 3)= (2n + 6)(n + 3) ------> is correct
option F
2(n + 3)^2=2(n^2+6n+9)=2n^2+12n+18 -----> is ok
therefore
answers areA, C, E, FHow many gallons of water does the full tank hold?
Given:
a.) After 2 minutes, the tank contains 400 gallons.
b.) After 5 minutes, the tank is full.
For us to be able to determine how many gallons of water does the full tank hold, let's first determine the discharge rate of the water filling in the tank.
We get,
[tex]\text{ Rate of discharge = }\frac{\text{ Volume}}{\text{ Time}}\text{ = }\frac{400\text{ Gallons}}{2\text{ Minutes}}[/tex][tex]\text{ Rate of discharge = 200 Gallons/Minute}[/tex]Since the tank is after 5 minutes of pumping water at a constant rate, we will just multiply the rate of discharge by the time it took for the tank to be full.
We get,
[tex]\text{Volume of the Tank = Time x Rate of Discharge = 5 (Minutes) x 200 Gallons/(Minute)}[/tex][tex]\text{ Volume of the Tank = 1000 Gallons}[/tex]Therefore the volume of the tank is 1000 Gallons
(10) Use the following freauency bar graph to answer the following questions.Chart of MTH 150 GradescountGradesa) How many students received a C for the course?b) How many students passed the course (with a C or higher)?c) How many students received no credit for the course (i.e. got an F)?d) How many total students took the course?e) Which letter grade represents the mode?
From the frequency bar graph, we can read the following information.
15 students got an A
6 students got a B
5 students got a C
10 students got a D
14 students got an F
a) As described above, 5 students got a C
b) Adding up the frequencies of the students who got C or higher:
5 + 6 + 15 = 26
26 students passed the course
c) Assuming the students who did not pass got any credits, then we add up the students with D and F: 10 + 14 = 24
24 students received no credit for the course
d) Total students in the course: 15 + 6 + 5 + 10 + 14 = 50
e) The mode is the letter grade that got the highest frequency:
Mode = A
A got 15
For the following function, determine whether the function is one-to-one.{(4,9), (3,6), ( - 8,11), (1, -17)}Is the function a one-to-oneYES OR NO
Answer
The function is one-to-one.
Check Explanation.
Explanation
Like the name suggests, one-to-one functions have each input variable having exactly one unique output. That is, multiple inputs never give the same output.
Also noting that the data in the function are written as
(x, y) OR (Input, Output)
For this question, we see that all of the input variables are different and all have unique output variables.
Hence, this function is a one-to-one function.
Hope this Helps!!!
MTR Apply Mathematics During a drought, the water level of a lake
decreases 3 inches every week. What will be the change in the water level
of the lake if the drought lasts for 7 weeks?
The level of water decreases would be 21 inches in 6 weeks if the water level of a lake decreases by 3 inches every week.
What are Arithmetic operations?The addition, subtraction, division, and multiplication of built-in functions can also be used to specify arithmetic operations. The term "arithmetic operator" refers to the operator that executes the calculation.
We have been given that a lake's water level decreases 3 inches every week when there is a drought.
We have to determine the lake's water level looks like after a seven-week drought.
As per the given condition,
Level of water decreases a week = 3 inches.
Level of water decreases in 6 weeks = 7 × 3 = 21 inches
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a rectangle solid measures 8cm long by 2cm wide by 2cm high. what is the surface-to-area-to-volume ratio?
The ratio of surface to area to volume of the given rectangle is 5 : 4 : 8
Length of the rectangle , l = 8 cm
Breadth of the rectangle , b = 2 cm
Height of the rectangle , h = 2 cm
Perimeter of the rectangle is
P = 2 (l +b)
= 2(8 + 2)
= 2 (10)
= 20 cm
Therefore , the perimeter of the rectangle is 20 cm
Area of the rectangle is
A = l x b
A = 8 x 2
A = 16 cm²
Therefore , area of the rectangle is 16 cm²
Volume of the rectangle is
V = l x b x h
V = 8 x 2 x 2
V = 8 x 4
V = 32 cm³
Therefore, volume of the rectangle is 32 cm³
Ratio of surface to area to volume = 20 : 16 : 32
= 5 : 4 : 8
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Skill BuildeWatch the video and then solve the problem given below.Click here to watch the videoMargaret drove to a business appointment at 40 mph. Her average speed on the return trip was 30 mph. The return trip took 1/3 hour longer because of heavy traffic. How far did she travel to theappointment?She traveled milesEnter your answer in the answer box and then click Check Answer.All parts showing
Let's call the distance to the appointment 'd', and the time of the first travel (going to the appointment) 't'.
Now, we need to use the formula for the distance:
[tex]\text{distance}=\text{average speed }\cdot\text{ time}[/tex]For the first part of the trip, we have the distance 'd', the average speed is 40 mph and the time is 't':
[tex]d=40\cdot t[/tex]Then, for the second part of the trip (return trip), the distance is also 'd', the average speed is 30 mph, and the time is 't + 1/3', because she took 1/3 hour longer than the first trip.
So we have that:
[tex]d=30\cdot(t+\frac{1}{3})=30t+10[/tex]Now, we just need to equate both 'd':
[tex]\begin{gathered} 40t=30t+10 \\ 10t=10 \\ t=1 \end{gathered}[/tex]So the time 't' is 1 hour. Now we can use that to find the distance 'd':
[tex]d=40t=40\cdot1=40[/tex]So the distance to the appointment is 40 miles.
graph the line with the slope -3/2 and y intercept -1
Answer: y = -3/2x - 1
Step-by-step explanation:
y = mx + b
1. m is the slope so substitute -3/2 for m. ( y = -3/2x + b)
2. b is the y intercept so substitute -1 in for b. ( y = -3/2x - 1)
at a shoe store shoes are one third of their original price the sale price of a pair of gym shoes is $ 15.50 write and solve an equation that could be used to find the original cost of the shoes
We will write an equation to find the original cost as follows:
[tex]15.50=\frac{x}{3}[/tex]And the general equation will be:
[tex]y=\frac{x}{3}[/tex]Here y is the price after discount and x the price without discount.
****
Since we have that the price is a third of the original, then the discounted price is found by multiplying the original value of the shoe times 1/3. After this operation takes place, the value we will obtain is the discounted prices [1/3 their original value].
Circumference of 2 circles =220m and 286m find area!
Helppp!!!!
Every line through the center of a circle forms a line of reflection symmetry, and every angle has rotational symmetry around the center. The areas are 123.83 [tex]m^{2}[/tex] and[tex]209.07m^{2}[/tex]
What is a circle?The form having the greatest surface area for a given perimeter is a circle.
Every line through the center of a circle forms a line of reflection symmetry, and every angle has rotational symmetry around the center. The orthogonal group O is the symmetry group of it (2,R). Circle group T is the collection of rotations alone.
Every circle is comparable.The radius and circumference of a circle are proportionate.The ratio between the enclosed area and the square of its radius is one.2 and, respectively, serve as the proportionality constants.The unit circle is the circle with radius 1 and an origin center.It becomes the Riemannian circle when viewed as a large unit sphere circle.A distinct circle can be found through any three locations that are not all on the same line. It is feasible to express explicitly equations for the coordinates of the circle's center and radius in terms of the coordinates of the three specified points in Cartesian coordinates.
Circumference= [tex]2\pi r[/tex]= 220 and 286
[tex]2\pi r[/tex]= 220
2*3.14*r=220
r= 220/35.03= 6.28
area=[tex]\pi r^{2}[/tex]
= 3.14*6.28*6.28
= 123.83[tex]m^{2}[/tex]
[tex]2\pi r[/tex]= 286
2*3.14*r= 286
r= 286/35.03 = 8.16
area= [tex]\pi r^{2}[/tex]
= 209.07[tex]m^{2}[/tex]
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What is the length of a rectangle with width 10 in. and area 97 in.²?
Answer:
9.7
Step-by-step explanation:
97/10= 9.7
formula for rectangle= length x width
area divided by width= 97/10
97/10=9.7
length=9.7
9.7x10=97
Below is the graph of y=3x".Translate it to make it the graph of y=3(x-4)3 +1.
There are two shiftments, 1 to the side along the x-axis and 1 vertical along the y-axis
Horizontal shifts:
[tex]y=(x\pm a)^n[/tex]Vertical shifts
[tex]y=x^n\pm a[/tex]Since the x is substracted 4 units, it means that the graph is translated 4 units to the right.
Since the function is completely added 1 unit its means that all the graph is shifted 1 unit up.
The current in a resistor is inversely proportional to the resistance. By what factor will the current change if the resistance increases 10%.
The factor by which the current changes if the resistance increases 10% is; 90.9% reduction
How to Interpret Ohms' Law?
Ohm's law states that the electrical current (I) flowing in a circuit is directly proportional to the voltage (V) and inversely proportional to the resistance(R). Therefore, if the voltage is increased, the current will increase provided the resistance of the circuit does not change. Thus;
I = V/R
Now, we are told that the resistance increases by 10%.
Thus, New value of resistance = 1.1R
Thus, new current/old current = 1/1.1 = 0.909 = 90.9%
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find the equatuon of the line y=_x+_
Answer: y = -2x + 5
Step-by-step explanation:
y = _x + 5
(5,0) (3,4)
(y2 - y1) / (x2 - x1)
(4 - 0 ) / (3 -5)
4 / -2
-2
y = -2x + 5
b. Express the mass of 21,000 molecules of oxygen in scientific notation.
grams
(Type your answer using the appropriate number of significant digits. Type you
The mass of 21,000 molecules of oxygen in scientific notation is expressed as 1.1151 x [tex]10^{-28}[/tex] grams in the proper significant digits.
What are Significant Digits?The number that is provided as digits is tried and established using significant figures. A meaningful representation of numbers is carried by these digits.
The crucial or important digits that can accurately represent the exact meaning of a certain number are known as the significant figures of that number.
Frequently, significant digits are employed in place of figures. By counting out each of the values beginning with the first non-zero digit on the left, we can use it to determine the number of significant digits.
The molecular mass of Oxygen is seen as 32 grams.
So, 6.023 x [tex]10^{23}[/tex] molecules of oxygen have mass as 32 grams
So, one molecule of oxygen has mass = [tex]\frac{32}{6.023 * 10^{23}}[/tex] grams
= 5.31 x [tex]10^{-23}\\[/tex] grams
So, 21,000 molecules will have mass = 21,000 x 5.31 x [tex]10^{-23}\\[/tex] grams
= 111510 x [tex]10^{-23}\\[/tex] grams
= 1.1151 x [tex]10^{-28}[/tex] grams
Thus 21000 molecules of oxygen have a mass of 1.1151 x [tex]10^{-28}[/tex] grams.
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The table represents an absolute value function f(x).
x f(x)
−2 4
−1 3
0 2
1 1
2 0
3 1
4 2
5 3
6 4
What are the vertex and range of the function?
Vertex (0, 2), Range: {y | 0 ≤ y < ∞}
Vertex (0, 2), Range: {y | 2 ≤ y < ∞}
Vertex (2, 0), Range: {y | 0 ≤ y < ∞}
Vertex (2, 0), Range: {y | 2 ≤ y < ∞}
From the table of the absolute value function the vertex and the range of the function is Vertex (2, 0), Range: {y | 0 ≤ y < ∞}
What is vertex of a function?the vertex represents the point where the graph crosses the axis of symmetry. This point usually occurs mid way the graph.
Examining the table shows that the coordinates of the vertex is
2 for the x coordinate0 for the y coordinateTherefore vertex ( 2, 0)
What is range ?The range is the point covered by the y coordinate. Since the ertex has the y coordinate as zero, this means that o is part of the values of the y making the third option the best choice
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Answer: Option 1
Step-by-step explanation:
just took the test
determine each quotient 5 divided by 1/105 divided by 3/105 divided by 9/10
Solution
- To divide by a fraction, you simply invert the fraction and instead multiply by the inverted fraction.
- Thus, we have:
[tex]\begin{gathered} \text{ 5 divided by }\frac{1}{10}: \\ \\ 5\div\frac{1}{10}=5\times\frac{10}{1}=50 \\ \\ \text{ } \\ \text{ 5 divided by }\frac{3}{10}: \\ \\ 5\div\frac{3}{10}=5\times\frac{10}{3}=\frac{50}{3} \\ \\ \\ \\ \text{ 5 divided by }\frac{9}{10}: \\ \\ 5\div\frac{9}{10}=5\times\frac{10}{9}=\frac{50}{9} \end{gathered}[/tex]Suppose a basketball player has made 359 out of 449 free throws. If the player makes the next 3 free throws, I will pay you $39. Otherwise you pay me $43.
Step 1 of 2 : Find the expected value of the proposition
The expected value of the proposition is $22.6
How to determine the expected value?The given parameters are
Proportions of free throws = 359 out of 449Amount paid for making a throw = $39Amount collected for losing a throw = $43Represent the proportion as a fraction
So, we have
p = 359/449
The expected value is then calculated as
E(x) = p * Amount paid for making a throw - (1 - p) * Amount collected for losing a throw
Where p represents the proportion defined above
So, we have
E(x) = 359/449 * 39 - (1 - 359/449) * 43
Evaluate the difference
E(x) = 359/449 * 39 - 90/449 * 43
So, we have
E(x) = 22.6
Hence, the proposition has an expected value of $22.6
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Answer:
-1.09
The problem requires one to calculate the win payoff and win probability as well as the lose payoff and probability. You would then do a calculation like this:
[(Win Payoff) x (Win Probability)] + [(Lose Payoff) x (Lose Probability)]
Which is the area of the figure, in square units
The area of the given figure ABCDEFG is 28 units².
What do we mean by area?The area is the total amount of space occupied by a flat (2-D) surface or an object's shape. On a piece of paper, draw a square using a pencil. It has two dimensions. The area of a shape on paper is the area that it occupies.So, the area of the given figure:
First, let's mark all the points and name the figure ABCDEFG.We can clearly see that side CE = CB = BD = EC = 4 units making ECBD a square.And, rest 3 triangles are divided from the figure of different dimensions.Now, calculate areas separately and as as follows:
Area of square ECBD:
a²4²16The area of square ECBD is 16 units².
Area of triangle ACB:
1/2 × b × h1/2 × 4 × 31/2 × 126The area of triangle ACB is 6 units².
Area of triangle CEG:
1/2 × b × h1/2 × 2 × 41/2 × 84The area of triangle CEG is 4 units².
Area of triangle BDF:
1/2 × b × h1/2 × 1 × 41/2 × 42The area of triangle BDF is 2 units².
Area of the given figure: 16 + 6 + 4 + 2 = 28 units²
Therefore, the area of the given figure ABCDEFG is 28 units².
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How do I use the graphs to evaluate the expressions
Given the graph, we cam find f(-3)+g(-2) below.
Explanation
[tex]\begin{gathered} f(-3)=-2 \\ g(-2)=0 \\ f(-3)+g(-2)=-2+0=-2 \end{gathered}[/tex]Answer: -2
What is the degree of the power function represented in the table f(x)
-3, -2, -1, 0, 1, 2, 3
The degree of the power function represented in the table f(x) is 2.
How to illustrate the information?In order to find the degree of the power function represented in the given table, you must find the difference of the y-values.
The second difference is illustrated as:
2 - 6 = -4.
-2 - 2 = -4
-6 - (-2) = -4
This illustrates that the second differences are constant.
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What is the degree of the power function represented in the table?
1
2
3
4
x h(x)
−2 −8
−1 −2
0 0
1 −2
2 −8
There are 100 centimeters (cm) in 1 meter (m) Choose the correct answers from the drop-downs lists to complete the sentence. To convert 4 m to centimeters Choose 4 by C
given: 100 cm = 1 meters
We need to convert 4 m to cm
so,
[tex]4m=4\cdot100\operatorname{cm}=400\operatorname{cm}[/tex]find the final amount of money in an account if $3,100 is deposited at 2.5% interest compounded quarterly and the money is left for 5 years
Given -
Money deposited in an account = $3,100
Interest rate = 2.5% compounded quarterly
Time = 5 years
To Find -
The final amount of money =?
Step-by-Step Explanation -
As we know there are 4 quarters in a year.
So,
In five years, there are 20 quarters.
On applying the formula:
Final Amount =
[tex]\begin{gathered} =\text{ }P\times(1+i)^n \\ \\ =\text{ 3100 }\times(1+\text{ 0.025/4})^{20} \\ \\ =\text{ 3100}\times(1\text{ + 0.00625})^{20} \\ \\ =\text{ 3100}\times(1.00625)^{20} \\ \\ =\text{ 3100}\times1.1327 \\ \\ =\text{ 3511.3939} \end{gathered}[/tex]Final Answer -
The final amount of money = $3511.4
Convert. 260 milliliters to centiliters.
Answer:
26 centilitres.
Explanation:
First, we start by recalling the standard conversion between millilitres and centilitres.
[tex]10\text{ milliliter = 1 centileter}[/tex]Let 260 milliliters = x centiliters
We express it as a ratio:
[tex]\frac{10\text{ }milliliters}{1\text{ centiliter}}=\frac{260milliliters}{x\text{ centiliters}}[/tex]Cross multiply to solve for x:
[tex]\begin{gathered} 10x=260\times1 \\ x=\frac{260}{10} \\ x=26\text{ centiliters} \end{gathered}[/tex]Therefore, 260 millilitres is 26 centiliters.
I need help with this practice problem from my ACT prep guideIt is trigonometry It asks to graph the function yourself, on paper, or on desmos
If we start with the parent function f(x) = cot(x), the transformation needed to go from this function to cot(x + π/6) is expressed as:
[tex]f(x)\to f(x+\frac{\pi}{6})[/tex]That is, we need to make a shift of π/6 units to the left, beginning with the cot(x) graph. The graph of cot(x + π/6) is: