Please help quick!!!! Will give brainiest!!!!!! Don’t answer if you don’t know.
Answer:
I
Step-by-step explanation:
Don´t know
Ms. Erin had 25 students in on of her math classes last semester. Now this class has 22 students. What is the percent of change? 10%13.6% 12%
Answer:
12% decrease
Step-by-step explanation:
[(new value - old value) / old value] x 100
(22 - 25) / 25 = -3/25 = -0.12
-0.12 x 100 = -12%
when you have a negative it indicates a decrease rather than an increase
The price of a new phone is $400.00 and the rate of sales tax is 7.6%
Answer:
$430.40
Step-by-step explanation:
7.6% of 400 = 0.076 × 400 = 30.4
A family paid $23,800 as a down payment for a hom. If this represents 14% of the price of the home find the price of the home
Answer:
the answer would be 1700 but ima not sure! hope this helps
Step-by-step explanation:
Help babes!! It’ll be much appreciated!!
Answer:
[tex] \sqrt[3]{125} = \sqrt[3]{5 \times 5 \times 5} = 5[/tex]
A. 5 is the right answer.Can anyone help me with this?
Answer: C
Step-by-step explanation: The graph shows "Height" and "Seconds" not only the height, meaning its "the number of seconds it takes the ball to reach its maximum height"
Answer:
C
Step-by-step explanation:
The number of seconds it takes the ball..
Simplify the expression.
-9z^4 (3z^3-5z^2+4z)
What is the measure of ZABC in the figure below?
Answer:
The angle is 90*
Step-by-step explanation:
Since B to D is 45*, we can double that angle to equal 90* because it shares line BD to ABC
12)If p and p' are the length of the perpendiculars drawn from the points (+-root a2-b2,0) to the line x/a cosA + y/b sinA = 1, prove that: p x p' = b2.
Answer:
Kindly refer to below explanation.
Step-by-step explanation:
Given equation of line:
[tex]\dfrac{x}{a}cos\theta+ \dfrac{y}{b}sin\theta =1\\OR\\\dfrac{x}{a}cos\theta+ \dfrac{y}{b}sin\theta-1=0[/tex]
Given points are:
[tex](\sqrt{a^2-b^2},0), (-\sqrt{a^2-b^2},0)[/tex]
Formula for distance between a point and a line is:
If the point is [tex](m, n)[/tex] and equation of line is [tex]Ax+By+C = 0[/tex]
Then, perpendicular distance between line and points is:
[tex]Distance = \dfrac{|Am+Bn+C|}{\sqrt{A^2+B^2}}[/tex]
Here,
[tex]A = \dfrac{x}{a}cos\theta\\B = \dfrac{y}{b}sin\theta\\C = -1[/tex]
For the first point:
[tex]m = \sqrt{a^2-b^2}, n = 0[/tex]
By the above formula:
[tex]p[/tex] and [tex]p'[/tex] can be calculated as:
[tex]p\times p' =\\\Rightarrow \dfrac{|\dfrac{cos\theta}{a}\times \sqrt{a^2-b^2}+ 0 -1|}{\sqrt{\dfrac{cos^2\theta}{a^2}+\dfrac{sin^2\theta}{b^2}}}\times \dfrac{|-\dfrac{cos\theta}{a}\times \sqrt{a^2-b^2}+ 0 -1|}{\sqrt{\dfrac{cos^2\theta}{a^2}+\dfrac{sin^2\theta}{b^2}}}\\\Rightarrow \dfrac{1-(\sqrt{a^2-b^2}\times \frac{cos\theta}{a})^2}{\dfrac{cos^2\theta}{a^2}+\dfrac{sin^2\theta}{b^2}}}[/tex]
Formula used:
[tex](x+y)(x-y) = x^2 - y^2[/tex]
[tex]\Rightarrow \dfrac{\dfrac{a^2-a^2cos^2\theta+b^2cos^2\theta}{a^2}}{\dfrac{b^2cos^2\theta+a^2sin^2\theta}{a^2b^2}}\\\Rightarrow b^2(\dfrac{a^2sin^2\theta+b^2cos^2\theta}{a^2sin^2\theta+b^2cos^2\theta})\\\Rightarrow b^2[/tex]
(Using the identity:
[tex]sin^2\theta +cos^2\theta = 1[/tex])
(Hence provded)
A social media website had 100,000 followers its first year. The number of followers increased by 9% each year. Write an exponential growth function to represent this situation
Answer:
an exponential growth function to represent this situation is:
[tex]x\left(t\right)=100,000\times \left(1.09\right)^t\:[/tex]
Step-by-step explanation:
We know that the exponential growth function is of the form
[tex]x\left(t\right)\:=\:x_0\:\times \:\left(1\:+\:r\right)^t[/tex]
where
x(t) represents the value at time tx₀ represents the initial value at time t = 0. In other words, it is the initial value (the amount before measuring growth or decay)r represents the growth factor when r > 0 and decay factor when r < 0t represents the of time intervals that have passedIn our case,
Given that
A social media website had 100,000 followers its first year. Thus,
x₀ = 100,000The number of followers increased by 9% each year. Thus,
r = 9% = 0.09Thus, substituting r = 0.09 and x₀ = 100,000 in the growth function
[tex]x\left(t\right)\:=\:x_0\:\times \:\left(1\:+\:r\right)^t[/tex]
[tex]x\left(t\right)=100,000\times \left(1+0.09\right)^t\:[/tex]
[tex]x\left(t\right)=100,000\times \left(1.09\right)^t\:[/tex]
Therefore, an exponential growth function to represent this situation is:
[tex]x\left(t\right)=100,000\times \left(1.09\right)^t\:[/tex]
A tennis ball has a mass of 0.06 kg and a basketball has a mass of 0.6 kg. How is the mass of the basketball-related to the mass of the tennis ball? Write a sentence or equation to show your answer.
An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.
0.06 x 10 = 0.6
Mass of the tennis ball x 10 = Mass of the basketball.
This means,
The mass of the basketball is ten times the mass of the tennis ball.
What is an expression?An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.
Example: 2 + 3x + 4y = 7 is an expression.
We have,
Mass of the tennis ball = 0.06 kg
Mass of the basketball = 0.6 kg
We can write as,
0.06 x 10 = 0.6
Mass of the tennis ball x 10 = Mass of the basketball.
This means,
The mass of the basketball is ten times the mass of the tennis ball.
Thus,
Mass of the tennis ball x 10 = Mass of the basketball.
The mass of the basketball is ten times the mass of the tennis ball.
Learn more about expressions here:
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Can someone help with this?
Answer:
i wanna say -80?
Step-by-step explanation: so when you go from -8 to -11 its counts by 3 -11 to -14 its 3 so count up to get our answer. i just seen how many was in each 5 set which was 12 so i did -20 -12 so then i just added up and got -80
find the sum or difference
(4y + 3) - (y -2)
Answer:
3y+5
Step-by-step explanation:
You will have to distribute the negative to (y-2).
4y+3-y+2
3y+5
Answer:
(4y + 3) - (y -2)
(4y + 3) - y + 2
3y + 3 + 2
3y + 5
What is the slope of the line in the graph?
Answer:
m = 1/4 (the slope is 1/4)
I selected the points (0,1) and (4,2), but if you choose (-4,4) and (0,1), then your slope would be -3/4----------------------------------------------------------------------------------------------------
Explanation:
(0,1)
(4,2)
-------------------------------------------
0 +4 = 4 <-- x value
1 +1 = 2 <-- y value
As we know, [tex]m=\frac{y}{x}[/tex] , so it's going be [tex]\frac{1}{4}[/tex]
PLEASE HELP I DON'T KNOW HOW TO SOLVE THIS.
Answer: b
Step-by-step explanation:
X is defined for all numbers on the domain starting at x=0. It doesn’t show or mention a cutoff/equation in the picture so it’s safe to assume it continues forever
To find the domain from the graph, you have to focus only x-axis because domain is the set of x-value.
From the graph, we can see that domain starts at x = 0 and keeps going and going positive infinitely. That means the domain must be greater or equal to 0.
Here is an easier way to understand
[tex]\large \boxed{ \sf{left/start}} \Longrightarrow \large \boxed{ \sf{right/end}}[/tex]
[tex] \large \sf{left = 0} \\ \large \sf{right = + \infin}[/tex]
And if we combine both, we get
[tex]0 \leqslant x \leqslant + \infin[/tex]
But we don't usually write positive infinity, therefore we convert to
[tex]0 \leqslant x \longrightarrow x \geqslant 0 \\ x \geqslant 0[/tex]
Answer[tex]x \geqslant 0[/tex]
If you have any questions related to this answer, feel free to ask in comment.
To find the domain from the graph, you have to focus only x-axis because domain is the set of x-value.
From the graph, we can see that domain starts at x = 0 and keeps going and going positive infinitely. That means the domain must be greater or equal to 0.
Here is an easier way to understand
[tex]\large \boxed{ \sf{left/start}} \Longrightarrow \large \boxed{ \sf{right/end}}[/tex]
[tex] \large \sf{left = 0} \\ \large \sf{right = + \infin}[/tex]
And if we combine both, we get
[tex]0 \leqslant x \leqslant + \infin[/tex]
But we don't usually write positive infinity, therefore we convert to
[tex]0 \leqslant x \longrightarrow x \geqslant 0 \\ x \geqslant 0[/tex]
Answer[tex]x \geqslant 0[/tex]
If you have any questions related to this answer, feel free to ask in comment.
What is 6P4?
15
24
360
720
Answer:
360
Step-by-step explanation:
I just done the quiz and got it right :) Choice C! Have a great day! Sub to my YT Channel plz
The permutation of 6 things taken 4 at a time is 360 So, option C is correct.
What are permutations?The different arrangements which can be made out of a given number of objects by taking out some or all at a time are called permutations.
The permutation of 6 things taken 4 at a time.
It is calculated as follows;
[tex]^6P_ 4[/tex] = 6!/(6-4)! =6!/2!
[tex]^6P_ 4[/tex] = (6×5×4×3×2×1) ÷ (2×1)
[tex]^6P_ 4[/tex] = 720/2 = 360
So, option C is correct.
Learn more about permutation ;
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Shawna buys 2 1/2 gallons of paint. If she uses 1/3 of it on the first day, how much does she have left?
Answer:
2 and 1/2 = 2.5
2.5 divided by 3 = 0.83
0.83 x 2 = 1.66 or 1 and 2/3 gallons of paint left
Step-by-step explanation:
Hope this helps! Have a nice day!
HELP I WILL GIVE BRAINLIEST
Answer:
Option C.
Step-by-step explanation:
If you see it says the frequency of black is 5, and there is 6 people. So if you do your math correctly it will equal 12.5%. Hope this helps!
Evaluate the expression (x^5)^3(16x^8)^1/2
Answer:
8x^23 i think
What is the GCF of 9,18, and 27
Answer:
ifs 9
Step-by-step explanation:
ndjdjkskdkdjjdjgjgjfjg mg hb
Answer:
The greatest common factor is 9.
Step-by-step explanation:
9 is the largest number that divides evenly into all three of those numbers and still produces an integer.
The area of a square park is the same as of a rectangular park.If the side of the square park is 60m legth of the rectangular park is 90m.Find the breadth of the rectangular
Answer:
The width of the rectangular park is 40m.
Step-by-step explanation:
We are given that the area of a square has the same area as the rectangle (the fact that they're parks doesn't matter)
We are also given one length side of the square, and since squares have all equal sides, we know all the side lengths are 60m.
To find Area, we do L * W, so it would be 60 * 60 = 3600.
That means the area of the rectangle park is 3600m. One side of the rectangle is 90m, so the formula is L * W = A. So we plug in known values of the rectangle which would be 90 * W = 3600. To find W, we do 3600/90 which is 40.
Let me know if you have any questions
pls help me combing like terms g-9g
Answer:
-8g
Step-by-step explanation:
If it is in that order:
You can either do
1g(same a just g)-9g
or
-9g+1g and you get -8g for each
I WILL MARK BRAINLIEST!!!
What is the absolute change from 2011 to 2014.
Give your answer in STANDARD NOTATION.
PLS GUYS!!! I HAVE ONLY 2 HOURS!!!!
Answer: 3
Step-by-step explanation:
What is the value of the product 2/3x9/5
Answer:
2/3 × 9/5 = 18/15 = 6/5 if need to simplify. or 1 1/5
Step-by-step explanation:
Gavin is working two summer jobs, making $20 per hour lifeguarding and making $6
per hour walking dogs. In a given week, he can work no more than 10 total hours and
must earn at least $90. If z represents the number of hours lifeguarding and y
represents the number of hours walking dogs, write and solve a system of inequalities
graphically and determine one possible solution.
Answer:
20z + 6y = 90
z + y = 10
Step-by-step explanation:
Step-by-step explanation:
20x = 6y= 90
x + y =10 20x + 6y = 90
y=10-x 6y= 90-20x
y=90-20x
---------
6
y=15 - 10/3x
y=10
y=15-10/3
Let the number of games, x, and the number of rides y, For 2x + 4y = 20, what is the slope of the graph? What is the slope? (Hint: Solve for y) Write the y-intercept as an ordered pair? (Hint: x=0 at the y-intercept) 10 Write the x-intercept as an ordered pair? (Hint: y = 0 at the x-intercept)
Answer:
m= -1/2, (0,5), (10,0)
Step-by-step explanation:
Let us write it in slope intercept form, y=mx +b where m is the slope:
2x+4y=20
4y= -2x+20
y= -1/2x+5
Therefore, the slope is -1/2
The y intercept can be found when we substitue 0 as x.
y= -1/2*0 +5
y=0+5
y=5
(0,5)
The x intercept can be found when we substitute 0 as y.
0=-1/2x+5
-5 =-1/2x
x= 10
(10, 0)
I hope this helped! :)
the length of a side of the square is 4x-1. write a simplified expression that represents the perimeter of the square
Convert 175% to a fraction.
Answer:
it will be 175 / 100 = 7 / 4 okay
2
Last year, the enrollment at Cullins MS was 400 students. This year, the enrollment is 480.
What is the percent increase in the number of students?
A
120%
B
80%
с
20%
D
17%
I think its b i don't know ok
Slope is 5, and (5,3) is on the line
The equation of the line is y=___
Answer:
y = 5x - 22
Step-by-step explanation:
In this question, we have to find the equation of the line.
We know that the slope is 5 and passes through (5, 3) on the graph.
We know that our equation must be in slope-intercept form: y = mx + b
To find our y-intercept, or "b", we would plug in our given information and solve for b.
Solve for b:
3 = 5(5) + b
3 = 25 + b
Subtract 25 from both sides.
-22 = b
This means that our y-intercept is -22. We can now make our equation with our new information:
y = 5x - 22
The equation of the line is y = 5x - 22
