Answer:
x = 18
x = 3
Step-by-step explanation:
2x² - 42x + 108 = 0
common factor is two, so take it out to simplify equation
2 (x² - 21x + 54) = 0
0/2 = 0
x² - 21x + 54 = 0
Factors of 54 which add up to 21 is 18 and 3
(x - 18)(x - 3) = 0
Hence,
x = 18
x = 3
24 × 10 × 90 = 90 × 2,400
Answer:
21600
Step-by-step explanation:
24x10x90=
240x90=
21600
Can someone thoroughly explain this implicit differentiation with a trig function. No matter how many times I try to solve this, I get it wrong. I’ve tried the quotient rule, and I’ve tried multiplying that (8 + x^2) to the other side to do the chain + product rule. I wanna know where I went wrong
Answer:
[tex]\frac{dy}{dx}=y'=\frac{\sec^2(x-y)(8+x^2)^2+2xy}{(8+x^2)(1+\sec^2(x-y)(8+x^2))}[/tex]
Step-by-step explanation:
So we have the equation:
[tex]\tan(x-y)=\frac{y}{8+x^2}[/tex]
And we want to find dy/dx.
So, let's take the derivative of both sides:
[tex]\frac{d}{dx}[\tan(x-y)]=\frac{d}{dx}[\frac{y}{8+x^2}][/tex]
Let's do each side individually.
Left Side:
We have:
[tex]\frac{d}{dx}[\tan(x-y)][/tex]
We can use the chain rule, where:
[tex](u(v(x))'=u'(v(x))\cdot v'(x)[/tex]
Let u(x) be tan(x). Then v(x) is (x-y). Remember that d/dx(tan(x)) is sec²(x). So:
[tex]=\sec^2(x-y)\cdot (\frac{d}{dx}[x-y])[/tex]
Differentiate x like normally. Implicitly differentiate for y. This yields:
[tex]=\sec^2(x-y)(1-y')[/tex]
Distribute:
[tex]=\sec^2(x-y)-y'\sec^2(x-y)[/tex]
And that is our left side.
Right Side:
We have:
[tex]\frac{d}{dx}[\frac{y}{8+x^2}][/tex]
We can use the quotient rule, where:
[tex]\frac{d}{dx}[f/g]=\frac{f'g-fg'}{g^2}[/tex]
f is y. g is (8+x²). So:
[tex]=\frac{\frac{d}{dx}[y](8+x^2)-(y)\frac{d}{dx}(8+x^2)}{(8+x^2)^2}[/tex]
Differentiate:
[tex]=\frac{y'(8+x^2)-2xy}{(8+x^2)^2}[/tex]
And that is our right side.
So, our entire equation is:
[tex]\sec^2(x-y)-y'\sec^2(x-y)=\frac{y'(8+x^2)-2xy}{(8+x^2)^2}[/tex]
To find dy/dx, we have to solve for y'. Let's multiply both sides by the denominator on the right. So:
[tex]((8+x^2)^2)\sec^2(x-y)-y'\sec^2(x-y)=\frac{y'(8+x^2)-2xy}{(8+x^2)^2}((8+x^2)^2)[/tex]
The right side cancels. Let's distribute the left:
[tex]\sec^2(x-y)(8+x^2)^2-y'\sec^2(x-y)(8+x^2)^2=y'(8+x^2)-2xy[/tex]
Now, let's move all the y'-terms to one side. Add our second term from our left equation to the right. So:
[tex]\sec^2(x-y)(8+x^2)^2=y'(8+x^2)-2xy+y'\sec^2(x-y)(8+x^2)^2[/tex]
Move -2xy to the left. So:
[tex]\sec^2(x-y)(8+x^2)^2+2xy=y'(8+x^2)+y'\sec^2(x-y)(8+x^2)^2[/tex]
Factor out a y' from the right:
[tex]\sec^2(x-y)(8+x^2)^2+2xy=y'((8+x^2)+\sec^2(x-y)(8+x^2)^2)[/tex]
Divide. Therefore, dy/dx is:
[tex]\frac{dy}{dx}=y'=\frac{\sec^2(x-y)(8+x^2)^2+2xy}{(8+x^2)+\sec^2(x-y)(8+x^2)^2}[/tex]
We can factor out a (8+x²) from the denominator. So:
[tex]\frac{dy}{dx}=y'=\frac{\sec^2(x-y)(8+x^2)^2+2xy}{(8+x^2)(1+\sec^2(x-y)(8+x^2))}[/tex]
And we're done!
Help PLEASE!!! THIS IS MY LAST!!!!!
Answer:
y- intercept= 1
m= 3
Step-by-step explanation:
m= (y2- y1)/(x2-x1)
m= (4-1)/(1-0)= 3
Write a sentence for equation 4m =52
Answer:
4 multiplied by m equals 52
Solve forx:
3x + 2 = 11
Answer:
x = 3
Step-by-step explanation:
3x + 2 = 11
Subtract 2 from both sides:
3x + 2 - 2 = 11 - 2
3x = 9
Divide both sides by 3:
3x / 3 = 9 / 3
x = 3
the product of a number and 4
Answer:
4n or n × 4
Step-by-step explanation:
Product means the result of multiplying factors.
Factors are the numbers or variables (a number, unknown) that are multiplied.
what are the steps to solving 10+7m=17
Answer: pemdas
Step-by-step explanation:
Evaluate 7y - 5x^2 when x =2 and y=3
Answer:
1
Step-by-step explanation:
7x3=21
2x2=4
4x5=20
21-20=1
is 0.70 a rational or irrational?
Answer:
Rational
Step-by-step explanation:
As 0.70 can be represented as 70/100 or 7/10
At the beginning of a snowstorm, Evan had 3 inches of snow on his lawn. The snow then began to fall at a constant rate of 3 inches per hour. Assuming no snow was melting, how much snow would Evan have on his lawn 3 hours after the snow began to fall? How much snow would Evan have on his lawn after tt hours of snow falling?
Answer:
3+3tt=total amount of snow
Step-by-step explanation:
y=mx+b is used to show increase
In this case, b is the original 3 inches of snow. m is the constant growth, and x is tt, or the amount of time it is being compared to. y is the total.
The snowfall is at a constant rate of 3 inches per hour, then after 3 hours the snow in the lawn will be 12 inches and after t hours snow in the lawn will be 3 + 3(t).
What is an equation?Equations are mathematical expressions that have two algebra on either side of an equal (=) sign. The expressions on the left and right are shown to be equal to one another, demonstrating this relationship. L.H.S. = R.H.S. (left-hand side = right side) is a fundamental simple equation.
As per the given scenario in the question,
Snow in the lawn = 3 inches
Rate of snow fall = 3 in/hr
So, the snow fall in 3 hours = 3 + 3(3) = 12 inches
And, snow fall after t hours = 3 + 3(t), here t is the number of hours.
To know more about equation:
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.215215215... as a fraction
Answer:
2/34
Step-by-step explanation:
What is the approximate average rate of
change for the height of the plant, measured in
centimeters per day, between day 20 and day
40?(leave answer in fraction and decimal)
Answer:
Average change in height of the plant is 0.5 cm per day.
Step-by-step explanation:
Height of the plant on day 20 = 40 cm
Height of the plant on day 40 = 50 cm
Change in height = 50 - 40 = 10 cm
Number of days between day 20 and day 40 = 20
Average change in height of the plant = [tex]\frac{\text{Change in height of the plant}}{\text{Duration}}[/tex]
= [tex]\frac{10}{20}[/tex]
= 0.5 cm per day
Therefore, average change in height of the plant is 0.5 cm per day.
Express the following absolute value inequality as two inequalities.
|x+2|>1
Answer:
it can be either one of this
x<-3 or x > -1
You can remember the three numbers to your combination lock, but you can’t remember their order. How many different combinations of the three numbers will you have to try, at most?
Answer:
6
Step-by-step explanation:
1-2-3-x-x
1-3-2-x-x
2-1-3-x-x
2-3-1-x-x
3-1-2-x-x
3-2-1-x-x
What is the value of -216x – y when x =-3 and y = 4?
O 44
0-28
O 28
O 44
Answer:
644
Step-by-step explanation:
[tex]-216 * x - y[/tex]
We know that:
x = -3
y = 4
We can find the value of our expression by substituting x and y with the values given above. For example, instead of y, we'll put 4:
[tex]-216*x - y\\-216*(-3) - 4\\[/tex]
Since -216 * -3 is equal to 648:
[tex]648-4[/tex]
[tex]644[/tex]
Answer: 644
The branch of government responsible for making laws is called the judicial branch. executive branch. legislative branch.
Answer:
Legislative
Step-by-step explanation:
The legislative branch makes laws. The executive branch enforces the laws. The judicial branch is made up of the courts.
Answer:
Legislative
Step-by-step explanation:
It's their biggest job
I took the test! Good luck :)
Knowing that ΔQPT ≅ ΔARZ, a congruent side pair is:
A. QT ≅ AZ
B. QP ≅ AZ
C. PT ≅ AR
D. QT ≅ RZ
Answer:
a.
Step-by-step explanation:
Decrease £110 by 10%
The admission fee to a state fair is $8.00. Each ride costs an additional $4.00. Karen only has $30.00.Which inequality could be used to determine the number of rides, x, Karen can go on?
Answer: 8 + 4x ≤ 30
Step-by-step explanation:
Since it costs $8 for Karen to enter the state fair and $4 each ride she goes, you would add 8 and 4x and include the less than or equal to sign symbol because Karen only has $30 and she got not spend anymore than $30.
What is the net for this rectangular prism?
Answer:
Finding the areas of each of the rectangles and squares of the net of a rectangular prism and adding up those areas gives the surface area or total surface area of the prism. For example, if the length of one side of the cube 4 units then the area of one its face is 4 × 4 = 16 square units.
Hope this helps you figure out the answer if not leave a comment and i will tell you
Option B is the correct answer.
What is a net diagram?Net diagram is a 2-dimensional plane figure which can be folded to form a 3-dimensional figure. Or we can say net diagrams are the figures which obtained by unfolding some 3D figures.
In the figure, given rectangular prism.
A rectangular prism is a prism whose bases (the top face and the bottom face) are also rectangles. It has 6 faces in all, out of which there are 3 pairs of identical opposite faces, i.e., all the opposite faces are identical in a rectangular prism. It has three dimensions, length, width, and height.
Therefore, option B is the correct answer.
Learn more about the net diagrams here:
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What is the slope of the line passing through the point 2, -1 and the origin?
Answer:
m= 1/2
Step-by-step explanation:
Use the slope formula to find the slope m .
I want help with my ALEKS homework !! :)
G is 95
H is 65
I is 20
Evaluate the expression: -3 - |-3|
Answer:
-6
Step-by-step explanation:
-3-3=-6
Step-by-step explanation:
-3-|-3|
-3+3
0
-×-=+
hope that helps
pls help me to find K as the subject of formula
Answer:
k = [tex]\frac{u^2y-x}{u^2-1}[/tex]
Step-by-step explanation:
Given
u = [tex]\sqrt{\frac{k-x}{k-y} }[/tex] ( square both sides )
u² = [tex]\frac{k-x}{k-y}[/tex] ← multiply both sides by (k - y)
u²(k - y) = k - x ← distribute left side
u²k - u²y = k - x ( subtract k from both sides )
u²k - k - u²y = - x ( add u²y to both sides )
u²k - k = u²y - x ← factor out k from each term on the left side
k(u² - 1) = u²y - x ← divide both sides by (u² - 1)
k = [tex]\frac{u^2y-x}{u^2-1}[/tex]
which expression correctly represents six more than the quotient of 3 and a number decreased by 8
Answer:
6 + 3 Divided by x minus 8.
Step-by-step explanation:
I NEED HELPPP QUICKK
I don't know how to do this can someone help me plz!?!?
Answer:
7) no 8) no 9) no 10)yes 11) yes 12) yes 13) k=42 14) c=30 15)a=42
Step-by-step explanation:
Answer:
do you still need help
Step-by-step explanation:
The average of Landry’s test scores must be at least 92 for her to make an A in Algebra class.
She got a 95 on her first test. What grade can Landry get on her second test to make an A in the class
Answer:
89
Step-by-step explanation:
On the first test, she got 3 more points than the average required, so she can afford to drop 3 points below the average on her second test. She needs 92-3 = 89 or better.
PLEASE HELP ASAP! URGENT!
Answer:
a-yes
b-no
c-no
d-yes
e-yes
Which best describes the relationship between the successive terms in the sequence shown?
2.4, –4.8, 9.6, –19.2
The common difference is –7.2.
The common difference is –2.4.
The common ratio is –2.0.
The common ratio is –0.5.
Answer:
The common ratio is -2.0
Step-by-step explanation:
I did the test and got it right
An aircraft flying onto an airport calls out the control tower and says it is at height of 500M above the tower .If its horizontal distance from the tower is 8KM ,calculate the angle of elevation from the top of the tower.
Answer:
32°
Step-by-step explanation:
As the aircraft horizontal distance is 'a', the vertical distance from the tower is 'o' . The 'a' is 8000M and 'o' is 500M.
[tex] tan(angle) = o \div a [/tex]
Thus, angle=32°
Answer:
32° is the answer.......