NEED HELP I SUCK AT MATH AND LIFE IN GENERAL =)
2 .A relation is plotted as a linear function on the coordinate plane starting at point C (0,−1)(0,−1) and ending at point D (2,−11)(2,−11) .
What is the rate of change for the linear function and what is its initial value?
Select from the drop-down menus to correctly complete the statements.
Options for rate of change: a. -11 b. -5 c. 0 d. 5
options for initial value: a. -11 b. -2 c. -1 d. 0
3. Maria is saving money so she can go to a professional football game. Maria has $25. She saves $5 a week.
Graph a ray to represent the amount she saved over time.
( i am really bad at graphs but you're just graphing this i guess???)
4. The temperature decreases by 0.5 degrees every hour.
5. x −2−2 −1−1 0 1 2
y −6−6 −4−4 −2−2 0 2 how would you put that onto a graph???
9. What is the equation of a line with a slope of 1212 and a point (3, 1) on the line?
Express the equation in the form of y=mx+by=mx+b where m is the slope and b is the y-intercept.
10.What does the initial value mean for this function?
Roberta saves $10 each week.
After 4 weeks, Roberta has $90.
Roberta had $50 before she started to save money each week.
Roberta had no money until she started to save $10 a week.
Answers
If you have two points, (x1, y1) and (x2, y2), the rate of change or slope would be
[tex] \frac{y2-y1}{x2-x1} [/tex].
In your problem, the given points are (0, -1) and (2, -11).
Using the formula for rate of change, the rate of change would be:
[tex] \frac{-11+1}{2-0} = \frac{-10}{2}=-5 [/tex].
The "initial value" is the y-intercept - where the graph intersects the y-axis and also where x = 0. The given point (0, -1) has x = 0, so the initial value is -1.
4. Remember the model equation for a graph of a line is
y = mx + b,
where m is slope and b is y-intercept - where the graph intersects the y-axis and also where x = 0.
The x-axis of the graph would be number of weeks, since it is independent.
The y-axis of the graph would be how much money she has.
Since she starts (at 0 weeks) at $25, the first point would be (0, 25). Notice here that it is the y-intercept since x = 0. The value of b in the model equation of a line y = mx + b would be 25.
The rate of change, or slope, is $5/week. This is m in the model equation of a line y = mx + b.
Putting b = 25 and m = 5 into the model equation y = mx + b (remember we use this equation because it works for all lines), the equation would be
y = 5x + 25.
4.
The slope of this will be -0.5degrees/hr, or just -0.5 if it is used as m in the
y = mx+b equation. The slope is negative because it "decreases".
5.
Plot each point and connect the dots. Remember the first number corresponds to the x-axis and the second to the y-axis.
For example in the table for x = -2 and y = -6, the point is (-2, -6), and from the origin (0,0) you go left 2 on the x-axis and down 6 to plot the point.
9.
I think you can do this if you can do #3, but now you have to find b by plugging in given values.
y = mx + b
y = 1212x + b
We can plug in the given point (3,1) to find b.
1 = 1212(3) + b
b = -3625
y = 1212 - 3625
10. Don't know which function you are referring to.
The slope is $10/week, or m = 10.
A point is (4, 90) because "After 4 weeks, Roberta has $90."
The y-intercept is 50 because x (weeks) = 0 at that time.
y = mx + b
y = 10x + 50
Related Questions
Make a mapping diagram for the relation.
{(–2, 2), (–1, –4), (0, –3), (2, 5)}
Answers
IT is dependant on what x equals We plug in our x-value such as 1 into an equation and then we get our y-value. SO basically we start off with an x-value and then land up with a y-value
SO for example we have an equation:
y=3x-4 Let x=3 ---> y=3(3)-4=5
So our y-value is 5 WE are doing the same thing with that mapping picture. ON the left hand side is all the x-values and the right hand side is all the y-values once it has been plugged "some" equatio which is unknown to us
Now we know that a paired coordinate has the form (x,y) where the first value in the bracket is the x-coordinate and the second value is the y-coordinate. The paired coordinate basically tells us that when x is this value y is that value
a culture contains 1500 bacteria initially and doubles every 30 mins. a) find a function that models the number of bacteria at time t. b) find the number of bacteria after 2 hours. c) after how much time will there be 4000 bacteria ...?
Answers
Below are the answers:
a. An = Ao • 2^(t/30)
b. An = 1500 • 2^(60*2/30) or An = 24000
c. 4000 = 1500 • 2^(t/30)
or 4000/1500 = 2^(t/30)
or ln(40/15) = (t/30) ln(2)
or t = 30* ln(8/3) / ln(2)
or t ~ 42.45 min
solve for x
5(2x - 1) = 6
A)x=1/10
B)X=11/10
C)X=1/2
Answers
A basketball team averages 98 points in its first three games.How many points must it score in the next game in order to have 100 point average overall?
Answers
The basketball team must score 106 points in the next game to have a 100-point average overall.
To determine how many points the basketball team must score in the next game to have a 100-point average overall, we need to consider the total points scored in the first three games and the desired average.
The team has already played three games and has an average of 98 points. To find the total points scored in these three games, we multiply the average by the number of games:
Total points in the first three games = 98 points/game * 3 games = 294 points.
To have a 100-point average overall, the team needs to score a total of 100 points per game multiplied by the total number of games played, including the next game.
Let's represent the number of points needed in the next game as "x."
(294 points + x points) / (3 games + 1 game) = 100 points/game.
Simplifying the equation:
(294 + x) / 4 = 100.
Cross-multiplying and solving for "x":
294 + x = 400.
x = 400 - 294.
x = 106.
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write a polynomial function in standard form with zeros at -3,-1, and 1
Answers
Answer:
Should be f(x) = x^3 + 3x^2 − x − 3 because this is written in standard form.
Step-by-step explanation:
Select all that justify the following statement.
10 + x 12 = 12x + 10
a) commutative - addition
b) distributive
c) associative - multiplication
d) symmetric
e) commutative - multiplication
f) associative - addition
g) identity - addition
Answers
And this 10 + x12 =10 + 12x is e) commutative - multiplication
So you use them both. And they're both correct.
Answer:
The statement satisfied the expression 10 + x 12 = 12x + 10 is
Option (e) i.e commutative - multiplication and Option (a) i.e commutative - addition .
Step-by-step explanation:
Commutative Property
Let a, b be two numbers thus they satisfied the commutative property
i.e a + b = b + a
As given the expression.
10 + x ×12 = 12x + 10
First apply the Option (e) i.e Commutative - multiplication.
Thus expression becomes
10 + 12x = 12x + 10
Now apply the Option (a) i.e Commutative - addition.
Therefore the statement satisfied the expression 10 + x 12 = 12x + 10 is
Option (e) i.e commutative - multiplication and Option (a) i.e commutative - addition .
What is the surface area of this design
Answers
hope it helps
Answer:
[tex]384\ in^{2} \\[/tex]
Step-by-step explanation:
Hello
according to the graph the figure is a cube, which has 6 square faces of 8 inches each side,the total area will be equal to the area of one of these faces multiplied by 6
Area of a square=side* side
Area of square= 8 in * 8 in
[tex]Area = 64\ in^{2} \\[/tex]
Now, the total area is
[tex]Tarea=6*64\ in^{2} \\Tarea=384\ in^{2}[/tex]
1 in= 1 inch = 2.54 cm
have a fantastic day
Which best describes the sides of any trapezoid?
A.
All sides are the same length.
B.
Only one pair of sides is parallel.
C.
Both pairs of opposite sides are parallel.
Answers
Hope this helps!
The answer is: only one pair of sides is parallel a.k.a b
What is 1 5/6 + 1/2 ?
a.
14/6
b.
17/12
c.
17/6
d.
25/12
Answers
convert to improper fraction
1 and 5/6=1+5/6=6/6+5/6=11/6
1/2 and 11/6
2 times 3=6
1/2 times 3/3=3/6
1/2+11/6=3/6+11/6=(4+11)/6=14/6
answer is A
Wren bought a baseball card last year for $2.25. this year the price dropped to $.45. what was the percent of decrease in the price of the card?
a. 80%
b. 400%
c. 500%
d. 120%
Answers
80%
I hope this helps! :)
Answer:
a. 80%
Step-by-step explanation:
The percent of decrease can be calculated as:
[tex]Percentage Decrease = \frac{Initial price - Final Price}{ Initial Price}*100 [/tex]
Then, replacing initial price for $2.25 and final price for $.45 we get:
[tex]Percentage Decrease = \frac{2.25 - 0.45}{2.25} *100[/tex]
percentage of decrease = 80%
Finally the percentage of decrease in the price of the card is 80%
change 50/16 into a mixed number .Reduce your answer to lowest terms a.48 3/16
b.3 1/25
c.3 1/8
d.4 7/8 ? ...?
Answers
In algebra, why do you think that you are given many problems to solve that aren't really "real life" problems? For example, "Twice the sum of a number and 5 is 24. Find the number." ...?
Answers
Algebra problems may not seem like 'real-life' problems, but they help build a deeper understanding of mathematical concepts.
Explanation:Often, in algebra, you are given problems that may not seem like 'real-life' problems because they are designed to emphasize understanding the underlying concepts rather than simply executing a mathematical recipe. These problems aim to build a more meaningful understanding of the content by focusing on what the numbers represent and how they relate to each other. For example, in the problem 'Twice the sum of a number and 5 is 24. Find the number,' you can practice solving by setting up an equation and using algebraic manipulation to find the number.
Which expression is equivalent to 3(x + 4y)?
6x + 16y
3x + 12y
8x + 24y
x + 4y
Answers
3x + 12y is the answer.
Jay earns $5.90 per hour working at the ice cream parlor after school. He needs at least $236 for a stereo system. Choose the inequality that describes how many hours Jay must work to buy the stereo system.
Answers
Solve the system of equations below by graphing them with a pencil and paper. Choose the correct ordered pair (b, u).
u = -b + 21
u = -2b + 30 ...?
Answers
u = -2b + 30 . . . (2)
Equating (1) and (2),
-b + 21 = -2b + 30
-b + 2b = 30 - 21
b = 9
u = -9 + 21 = 12
Therefore, (b, u) = (9, 12).
Help! Need help!
1. Justin is considering two websites for downloading music.The costs are detailed here.
Website 1: a yearly fee of $30 and $1.50 for each download
Website 2: $2 for each download
What is a system of equations to represent the costs for one year?
Express your equations in the form of y=mx+by=mx+b where x is the number of downloads for the year and y is the total cost for the year.
Website 1:
Website 2:
2. Is the system of equations is consistent, consistent and coincident, or inconsistent?
y=4x−4y=−4x+4
a. consistent b. consistent and coincident c. inconsistent
Answers
website 2 : y = 2x + 0...or just y = 2x
=======================
y = 4x - 4
y = -4x + 4
4x - 4 = -4x + 4
4x + 4x = 4 + 4
8x = 8
x = 1
y = 4x - 4
y = 4(1) - 4
y = 4 - 4
y = 0
so this is a consistent system because it has one solution (1,0)
The number of private investigators is expected to increase from 52,000 in 2006 to 61,000 in 2016. If there are 648,982 police officers in 2006, how many police officers must there be in 2016 to have a greater percent increase than that of private investigators?
Answers
p = ( 61,000 * 100 ) : 52,000 = 117.30769 %
The percent of increase of the number of private investigators is 17.30769 %.
The number of police officers in 2006 is 648,982
648,982 x 1.1730769 = 761,305.79
Answer:
In 2016 must be at least 761,306 police officers
To have a greater percent increase than private investigators between 2006 to 2016, there must be approximately 760,945 police officers in 2016. This is found by applying the formula for percentage increase and adjusting it to find the required final number.
Explanation:The percent increase of private investigators from 2006 to 2016 is found by subtracting the initial number from the final number, then dividing by the initial number and multiplying by 100%. This formula gives us (61000 - 52000) / 52000 * 100 = 17.3%, rounded to the nearest tenth of a percent.
To have a greater increase in police officers than that of private investigators, the percent increase must be more than 17.3%. To find the required number of police officers in 2016, we first express 17.3% as a decimal, which is 0.173. Then we use the formula for percentage increase, which is (final number - initial number) / initial number = percentage increase. By rearranging the formula, we get the required final number = (initial number * percentage increase) + initial number. Substituting the given figures, we have (648982 * 0.173) + 648982 = 760945, rounded to the nearest whole number.
Therefore, there must be approximately 760,945 police officers in 2016 to have a greater percent increase than that of the private investigators.
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equation for line parallel to 2x-3y+6=0, with the same y intercept
Answers
the equation of a line that is paralell to the line with the SAME y intercept is the same line
so the answer is 2x-3y+6=0 or any other form of that like 2x-3y=-6, or y=2/3x+2
which of the following is the sum of 3/18+2/18 reduced to lowest terms?
Answers
3/18 + 2/18 = 5/18
And it is in the simplest form.
Is the number 53 a prime number or a composite number
Answers
Answer:
It's prime:)
Step-by-step explanation:
What is the definition of percent??
Answers
Hope this helps :)
What is 10 to the power of 3?
Answers
A side of the square is 4t. the area of the square is 400. what is the value of t?
Answers
The value of the variable 't' will be 5.
What is the area of the square?All the sides of a square are congruent. Let a be the side length of the square. Then the area of the square is the square of the side length of the square.
Then the area of the square will be
Area of the square = a² square units
A side of the square is 4t. the area of the square is 400. Then the value of the variable 't' will be
400 = (4t)²
(4t)² - 20² = 0
(4t - 20)(4t + 20) = 0
t = -5, 5
Thus, the value of the variable 't' will be 5.
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kenya picked 18 flowers from her garden. If 3/5 of flowers in her garden remain unpicked, how many flowers are still in her garden?
Answers
Find the least residue of 7^5 mod 50 without using a calculator.
so far I have 7=7 mod 50 7^5 = 7^5 mod 50 7^2 = 49 7^3=343 since 7^2=(-1)mod50 and 7^3=(-43)mod50 it follows that 7^6=7^2 * 7^3 = (-1)(-43) = 43 feel like this is wrong though could somebody please explain where I have made an error?
Answers
7^2 = 49 = -1 (mod 50)
7^3 = 7^2*7 = (-1)*7 = -7 (mod 50)
7^4 = (7^2)*(7^2) = (-1)*(-1) = 1 (mod 50)
7^5 = (7^4)*7 = 1*7 = 7 (mod 50)
So 7^5 = 7 (mod 50)
In other words, if we divided 7^5 over 50, the remainder would be 7. We don't need to worry about the quotient.
There are 132 people seated in the school auditorium for an assembly. There are 6 rows in the auditorium, each with the same number of seats. If the auditorium is completely filled, how many seats are there in each row?
Answers
Explanation:
132÷6=22
Hope it helps!
70 is 25% of what number
Answers
70=?.25%
70=?.25/100
70=?.1/4
?=280
A submarine's elevation changes -657 feet over a period of 6 minutes. If the submarine descended at a constant rate, what is the approximate elevation change per minute?
-130 feet
-90 feet
-120 feet
-110 feet
Answers
The approximate elevation change per minute for the submarine is -109.5 feet.
Explanation:To find the approximate elevation change per minute, we need to divide the total elevation change by the total time taken. The submarine's elevation changes by -657 feet over a period of 6 minutes. So, we divide -657 by 6 to get the approximate elevation change per minute.
-657 / 6 = -109.5 feet
Therefore, the approximate elevation change per minute is approximately -109.5 feet.
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"Which ranges describe the cluster in the scatter plot?
Choose exactly two answers that are correct.
A.between 8 and 10 years of age
B.between 32 and 72 pages read
C.between 10 and 12 years of age
D.between 32 and 38 pages read"
Answers
Hope i helped!:)
Answer:
A and C
Step-by-step explanation:
A.between 8 and 10 years of age
C.between 10 and 12 years of age
21 is 60 percent of what number