Answer:
i got 485!
Step-by-step explanation:
multiply 40 by $15 = 600 then subtract 10% = 540 then subtract 7.5% = 499.5 lastly subtract 2.9% = 485 and that's his take home money :)
Helppppppppppppp ASAP
Answer:
Option C and D
Step-by-step explanation:
For a quadratic function having no x-intercepts the discriminant should be less than 0 .
[tex]D=b^2-4ac[/tex]
Now if this is less than zero if we plug in the values of a, b and c the square root of a negative number cannot be calculated thus giving us no real x-intercepts.
[tex]x=-b+-\frac{\sqrt{b^2-4ac} }{2a} \\\\x=-b+-\frac{\sqrt{D} }{2a}[/tex]
Here we can see that if we the value of D is less than zero the square would not be possible thus our correct choices are ,
Option C and D
Which inequality represents the graph below?
Answer:
y=-2/3x+3
Step-by-step explanation:
because -2/3 is the slope, y int 3
amy can run the 150 meter dash in 50 seconds. john can run 1200 meters in 400 seconds. who runs faster per second?
Answer:
Amy
Step-by-step explanation:
amy completed a longer distance in a shorter amount of time
rather than john completed a shorter distance in a longer time
CAN SOMEONE PLEASE HELP ME WITH THIS QUESTION I DONT UNDERSTAND IT I NEED HELP ITS DUE IN 3 MINUTES
Answer:
I think it's 64, I'm not sure but I hope this helps
Step-by-step explanation:
IT'S NOT 64!! The real answer is 45%
3. Which of these numbers is classified as both real and rational? (1 point
O/17
O9
2
O
Type here to search
Í
Answer:
2 and 09 but if it's just one option, pick 2
Step-by-step explanation:
the others aren't rational i think
Please help me
A graph is shown below:
Answer:
sorry but their is no picture its black...
Answer:
Option D is correct
Step-by-step explanation:
For this question we would need the equation of line since this is a multiple choice question you wouldn't have enough time to find out the equation so we need to be FAST
If we see all the four options at first glance option C or option D seem correct because the line represents a rise in values of x and y respectively, which means x increases with respect to y. So the slope/gradient in other words m should be positive so option A and B are ruled out because the equation of line is written as
[tex]y=mx+b[/tex]
where m is the slope and b is the y-intercept so seeing the graph our equation of line should be
[tex]y=mx-2[/tex]
where b = -2 because value of b corresponds to y-intercept which means the where the graph intersects the y-axis in this case its -2
where m is positive in this case 5 thus
[tex]y=5x-2[/tex]
if we try to rearrange the four choices option C and D give us the above equation and option A and B give us
[tex]y=-5x+2[/tex]
which is wrong !
Now, regarding the inequality sign the graph represents
[tex]y=5x-2[/tex]
and the area which is shaded in blue is the region lower the line which means it should be
[tex]y\leq 5x-2[/tex]
in this case its D if we rearrange it
I have two images so you understand it better visually
As you can see in both forms are shaded region is the same so option D is correct
A coffee shop uses 4 liters of milk every day.
a. If there is 15 L of milk in the fridge, after how many days will more milk need to be purchased?
b. If only half as much milk is used each day, after how many days will more milk need to be purchased?
Answer:
a. 15L will last the cafe 3 days if they're using 4L every day
b. 15L will last them 7 days if they're using 2L every day
Step-by-step explanation:
division.
WILL GIVE BRAINLIEST
Step-by-step explanation:
[tex]\qquad\quad {:}\leadsto\sf \dfrac {2x (x+7)}{\cancel{(x-3)}}\times {\dfrac {(x-9)\cancel{(x-3)}}{8x^2 (x+7)}}[/tex]
[tex]\qquad\quad {:}\leadsto\sf \dfrac {2x\cancel{(x+7)}}{x-3}\times {\dfrac {x-9}{8x^2 \cancel{(x+7)}}}[/tex]
[tex]\qquad\quad {:}\leadsto\sf \dfrac{2x (x-9)}{8x^2}[/tex]
[tex]\qquad\quad {:}\leadsto\sf \dfrac {\cancel{2x}^2-18x}{\cancel{8x}^2}[/tex]
[tex]\qquad\quad {:}\leadsto\sf \dfrac {18x}{4}[/tex]
[tex]\qquad\quad {:}\leadsto\sf \dfrac {9x}{2}[/tex]
[tex]\qquad\quad {:}\leadsto\sf 4.5x [/tex]
plz answer correctly will give 30 points.
Answer:
20
Step-by-step explanation:
trust me.
Answer:
20
Step-by-step explanation:
The base square itself is 4 x 4 which is 16, then there are 4 halfs which makes 2 more and the other 2 in that 2 triangles so 20
plz help me with this will give 25 points, please
Answer:
all girls are the same bro
Step-by-step explanation:
Answer:
20
Step-by-step explanation:
An easy way is to just count the grids blocks, which are squares.
There are 18 of these.
For the rest, since they are in the shape of a triangle, they will count as a half grid block.
There are 4 of these, which are 4 halfs, which equal to 2 square blocks.
Add them, 18+2=20
Emma wants to strain a circular deck that has a diameter of 12 m the cost of the wood stain is $3.25 per square meter how much
Answer:
0.25
Step-by-step explanation:
whats the slope Hurry!
Rewrite 2.568 - 1.2 to make the divisor a whole number. Select the answer
choice that shows the correct setup for long division and answer.
O A. 12)2.568 = 0.214
O B. 12) 2.568 = 2.14
O c. 12)
25.68 = 2.41
O D. 12) 25.68 = 2.14
SUBMIT
Answer:
D. 12) 25.68 = 2.14
Step-by-step explanation:
Given :
Divisor = 1.2
Dividend = 2.568
We can make the divisor a whole number by multiplying the divisor by 10,
i.e. Divisor = 1.2 x 10 = 12
Similarly , dividend = 2.568 x 10 = 25.68
Therefore,
2.14
12 | 25.68
(-) 24
16
(-) 12
48
(-) 48
0
Hence the answer is 2.14
What is the value of : 7+8×2-6+3
Answer:
The value is 20.
Step-by-step explanation:
To solve this equation, you must use the method of PEMDAS. In this order, you should multiply 8 by 2 first to get 16 for the first part of your answer. Your equation should now be 7 + 16 - 6 + 3. You can now solve this equation from left to right manually. Add 16 from 7 to get 23, subtract 6 from that number to get 17 and add 3 to get your final answer which is 20.
Answer:
27 :)
Step-by-step explanation:
7+8=15
15x2=30
30-6=24
24+3=27
The graph shown can be used to solve which of these systems of equations?
A)
y = -7x and y = x - 78
B)
y = -7x and y = x2 - 78
C)
y = 7x and y = x - 78
D)
y = 7x and y = x2 - 78
Answer: It is B
Step-by-step explanation:
Just took the test
PLEASE PLEASE HELPPPP
Answer:
a) y=5000e^{0.099t}
b) 11.097 hours
Step-by-step explanation:
a
Many systems exhibit exponential growth. These systems follow a model of the form [tex]y=ae^{kt}[/tex], where a represents the initial state of the system and k is a positive constant, called the growth constant.
So we have our value of which represents the initial state of the system, which is 5000.
We need to calculate k.
Now,
It says he doubling time of a population of bacteria is 7 hours there are 5000 present initially, which means at 0 hours there were 5000 bacteria (initially means at t = 0, and then after 7 hours it doubled so it became 10,000 at 07:00 hours then at 14:00 it became 20,000 and then at 21:00 it became 40,000 this is the doubling time. So to calculate the value of k we can use this data, lets take 10,000 bacteria at 07:00 hours and put in our equation.
[tex]y=ae^{kt} \\y=5000e^{kt}[/tex]
value of a is 5000 which was the initial value now we need the value of y which is the total amount of bacteria after t hours. So after 7 hours we have a total of 10,000 bacteria so our value of t becomes 7 and value of y becomes 10,000.
[tex]10000=5000e^{7k}[/tex]
[tex]2=e^{7k} \\[/tex]
Apply natural logarithm on both sides
[tex]ln2=lne^{7k}[/tex]
Ln e becomes 1 as we all know so we write 7k as it is.
[tex]ln2=7k[/tex]
[tex]k=\frac{ln2}{7} \\k=0.099[/tex]
Now our equation is
[tex]y=5000e^{0.099t}[/tex]
we can confirm this by inserting time t as 7 , 14 , 21 , 28 , 35 and we will get the exact bacteria we need which is y 10,000 , 20,000 , 40,000 , 80,000 , 160,000, respectively.
b)
It says how long will it take the population to triple which means the triple of 5000 is 15,000 and we set that to the value of y which is the amount of bacteria, and calculate t.
[tex]y=5000e^{0.099t} \\\\15000=5000e^{0.099t} \\\\3=e^{0.099t} \\ln3=lne^{0.099t} \\\\ln3=0.099t\\\\t=\frac{ln3}{0.099} \\\\t=11.097[/tex]
Which means it would take 11.097 hours for bacteria of 5000 to triple in size.
which equation has a value greater than -6 and less than 15?
Answer:
I belive it would be D
Step-by-step explanation:
please hurry! which of the following is true?
Answer: it would be the first option. they are both the first letters of their little cluster of letters (don't judge, i have no idea what it's called haha) and the rest of them do not match up. so, it is the first answer.
Answer:
answer: A
Step-by-step explanation:
They are all incorrect besides A
-1/5 = cos1.2k . find k
Answer:
cos.1.1k
Step-by-step explanation:
Need help if correct you get brainliest answer.
Answer: the line is intercepting with 4 if that's what you're asking
Step-by-step explanation:
-4(-6y – 3) = 12 What is the value of y?
Answer:
y=0
Step-by-step explanation:
So you would do -4(6y-3) and divide that by -4
then you would do 12 and divide that by -4
or
You could do
-6y-3 which equals -3
then
add three to both sides like this -6y-3+3=-3+3
then simplify it to -6y=0
then divide -6y over -6 and 0 over -6
then it will simplify to 0
Yall i need this to be corret please explain giving brainliest please
Answer:
A) both expression involve addition
these 3 questions i need help
Answer:
1)=-80 | 2)=8,9,10 | 3)=12
Step-by-step explanation:
-80*3/4=-60
8+9+10=27
12*2-4=20
I hope this helps
In the figure below, AMNO APQR. Determine the length of QR.
–5(–2) =
Please Show How You Did it :)5
Answer:
10
Step-by-step explanation:
well you are multiplying -5 and -2. When multiplying two negative numbers you get a positive. 5x2= 10.
Select the correct answer
Jay and Kevin are showing the snow off a driveway. Working together, they can dear the driveway of snow in 14 minutes. Working alone
would take en 21 minutes longer to clear the driveway of snow than it would take jay working alone. When the number of minutes
would take ay to dear the driveway of snow when working alone, the situation is modeled by this rational equation
How long would it take jay to dear the driveway of snow working alone!
Answer:
7 minutes
Step-by-step explanation:
When Jay and Kevin work together to clear the driveway of snow it takes an average of 14 minutes. If Jay or Kevin works alone to clear the driveway he can clean it in 21 minutes. In total if Jay works alone then he can clean the driveway by spending additional 7 minutes.
Answer:
21
Step-by-step explanation:
Find the percent increase or decrease for each of the following values (Indicate whether each is an increase or a decrease).
1/2 q to 7/8 q
Answer: the decreases is 4% over 2% and the increase is thx for the points
Step-by-step explanation:
Which describes the measure of a person's financial worth, determined by
adding everything that a person owns, and subtracting everything that the
person owes?
A. Owner's equity
B. Net worth
C. Liability capital
Answer:
Net Worth
Step-by-step explanation:
Help! Will give brainlest
Answer:
A. 3, 7, 9, 10, 12
Step-by-step explanation:
All of these numbers as x are less than 14.
Hope it helps!
Let x be the particular solution
Answer:
[tex]f(x)=\sqrt{\frac{1}{4x^2-3}}[/tex] for [tex](-\infty, -\sqrt {\frac 3 4 })[/tex] and [tex](\infty, \sqrt {\frac 3 4 })[/tex] .
Step-by-step explanation:
The given differential equation is [tex]\frac{dy}{dx}=-4xy^3[/tex]
Rearranging it as
[tex]y^{-3}dy=-4xdx \\\\\frac{y^{-3+1}}{-3+1}=-4\frac{x^2}{2}+C \\\\\frac{y^{-2}}{2}=4\frac{x^2}{2}+C \\\\y^{-2}=4x^2+C\cdots(i)[/tex]
where C is constant.
The initial condition is f(-1)=-1, i.e for x=-1, y=-1.
So, by using the initial condition to get the value of constant:
[tex](-1)^{-2}=4(-1)^2+C \\\\1=4+C \\\\C=1-4=-3[/tex]
From equation (i), we have
[tex]y^{-2}=4x^2+(-3) \\\\y^2=\frac{1}{4x^2-3} \\\\y=\sqrt{\frac{1}{4x^2-3}} \\\\[/tex]
As y=f(x), so the required particular solution
[tex]f(x)=\sqrt{\frac{1}{4x^2-3}}[/tex]
Now, determining the domain of the function
As for a real value output, the term under square root must be positive.
So,
[tex]\frac{1}{4x^2-3} >0 \\\\\Rightarrow 4x^2-3 >0 \\\\\Rightarrow x^2 > \frac 3 4 \\\\\Rightarrow |x|>\sqrt {\frac 3 4 } \\\\\Rightarrow x> \sqrt {\frac 3 4 } \; and \; x< -\sqrt {\frac 3 4 }[/tex]
Therefore, the domain of the function is
[tex](-\infty, -\sqrt {\frac 3 4 }) \;and\; (\infty, \sqrt {\frac 3 4 })[/tex]
Hence, [tex]f(x)=\sqrt{\frac{1}{4x^2-3}}[/tex] for [tex](-\infty, -\sqrt {\frac 3 4 })[/tex] and [tex](\infty, \sqrt {\frac 3 4 })[/tex] .
