Given the initial expression,
[tex]3x(x^2-x-2)+2x(3-x)-7x[/tex]Simplify it as shown below
[tex]\begin{gathered} =3x*x^2-3x*x-3x*2+2x*3-2x*x-7x \\ =3x^3-3x^2-6x+6x-2x^2-7x \end{gathered}[/tex][tex]\begin{gathered} =3x^3-3x^2-2x^2-7x \\ =3x^3-5x^2-7x \end{gathered}[/tex]Thus, the answer is 3x^3-5x^2-7xFor what values of x is the expression below defined?A.-5 x < 1B.5 > x -1C.5 > x > 1D.5 x 1
Given:
There are given that the expression:
[tex]\frac{\sqrt{x+5}}{\sqrt{1-x}}[/tex]Explanation;
First, let's notice that we need positives to numbers inside both roots.
So,
The root of a negative number is a math error.
Then,
With that information, let us analyze the options.
From option A:
If we add 5 to this inequality, we have:
[tex]\begin{gathered} -5+5\leq x+5<1+5 \\ 0\leq x+5<6 \end{gathered}[/tex]That means the number in the first root is positive.
Now, we want 1-x to be positive:
[tex]\begin{gathered} -5\leq x<1 \\ 5\ge-x>-1 \\ 1+5\ge1-x>1-1 \\ 6\ge1-x>0 \end{gathered}[/tex]So, it is positive:
Final answer;
Hence, the correct option is A.
Estimate 20 x 37 x 21/5 ÷ 98. Is it an overestimate or underestimate? Explain.
20 x 37 x 21/5 ÷98
Find if 20 x 37 x 21/5 is bigger or lower than 98
20x37x21/5= 15540/5= 3108
Then 3108/98 is an overestimate
= 3108/98=31. 71
Answer is 31.71
Let's test out the prediction! On the coordinate plane below, plot the points from your table in Slide 4 and sketch the graph.Table from slide 4: Bounce Height after Bounce 1. 92. 8.13. 7.294. 6.561
Answer
Check Explanation
Explanation
To do this, we will let the bounce be represented on the x-axis as x and the height after bounce plotted on the y-axis as y
So, the table looks like
x | y
1 | 9
2 | 8.1
3 | 7.29
4 | 6.561
So, we plot these points on a graph and sketch a line of best fit to pass through them
Hope this Helps!!!
Solve the given expression for x = -18:5x/3 - 2
ANSWER
[tex]-32[/tex]EXPLANATION
We want to solve the given expression for x = -18:
[tex]\frac{5x}{3}-2[/tex]To do this, substitute the given value of x into the expression and simplify. That is:
[tex]\begin{gathered} \frac{5(-18)}{3}-2 \\ \frac{-90}{3}-2 \\ -30-2 \\ \Rightarrow-32 \end{gathered}[/tex]That is the answer.
6.4 times m minus 12 equals 45.6
Given
6.4 times m minus 12 equals 45.6
To find: The value of m.
Explanation:
It is given that,
6.4 times m minus 12 equals 45.6.
Then,
[tex]\begin{gathered} 6.4m-12=45.6 \\ 6.4m=45.6+12 \\ 6.4m=57.6 \\ m=\frac{57.6}{6.4} \\ m=9 \end{gathered}[/tex]Hence, the value of m is 9.
How do you subtract 5/6 - 5/9 then write it as a fraction in simplest form?
To subtract two fractions we can use the following:
[tex]\frac{a}{b}-\frac{c}{d}=\frac{(a\cdot d)-(b\cdot c)}{b\cdot d}[/tex]So 5/6 - 5/9 is equal to:
[tex]\frac{5}{6}-\frac{5}{9}=\frac{(5\cdot9)-(6\cdot5)}{6\cdot9}=\frac{45-30}{54}=\frac{15}{54}[/tex]Finally, we can simplify the fraction dividing the numerator and denominator by 3, as:
[tex]\frac{15}{54}=\frac{15/3}{54/3}=\frac{5}{18}[/tex]So, the answer is 5/18
Answer: 5/18
(6.4x10^5)-(5.4x10^4)
Solution:
Given:
[tex](6.4\times10^5)-(5.4\times10^4)[/tex][tex]\begin{gathered} (6.4\times10^5)-(0.54\times10^5)=(6.4-0.54)\times10^5 \\ =5.86\times10^5 \end{gathered}[/tex]Also, we can rewrite the numbers as ordinary number and get the difference;
[tex]\begin{gathered} 640000-54000=586,000 \\ \\ As\text{ scientific notation;} \\ 586,000=5.86\times10^5 \end{gathered}[/tex]Therefore;
[tex](6.4\times10^5)-(5.4\times10^4)=5.86\times10^5[/tex]
Answer:
586000
Step-by-step explanation:
(6.4×10^5)-(5.4×10^4)
=640000-54000
=586000
in the equation 4x^3=56, what is the value of x
The given equation is
[tex]4x^3=56_{}[/tex]First, we divide the equation by 4.
[tex]\begin{gathered} \frac{4x^3}{4}=\frac{56}{4} \\ x^3=14 \end{gathered}[/tex]At last, we take the cubic root on each side.
[tex]\begin{gathered} \sqrt[3]{x^3}=\sqrt[3]{14} \\ x\approx2.41 \end{gathered}[/tex]Therefore, the value of x is 2.41, approximately.Find a measurement of the complement for the angle 20
Given:
There are given that the angle is 20 degrees.
Explanation:
According to the concept:
The complementary angle is:
[tex]90^{\circ}-\theta[/tex]Then,
Put the value of an angle;
So,
[tex]\begin{gathered} 90^{\circ}-\theta=90^{\circ}-20 \\ =70^{\circ} \end{gathered}[/tex]Final answer:
Hence, the measure of the complement is 70 degrees.
If segments WY and XZ are diameters of circle T, and WY=XZ=6. If minor arc XY= 140 degrees, what is the length of arc YZ?
hello
to solve this question, we need to draw an illustration
since we are looking for the major arc, we would subtract the minor arc from 360 degrees
major arc YZ =
[tex]\begin{gathered} yz=360-xy \\ yz=360-140=220 \end{gathered}[/tex]now, we know the angke on the major arc is equal to 220 degrees, we can use this information to solve for the length of the arc.
length of an arc
[tex]\begin{gathered} L_{\text{arc}}=\frac{\theta}{360}\times2\pi r \\ \theta=angle \\ r=\text{radius} \\ \pi=3.14 \end{gathered}[/tex]but in this question, we were given the diameter of two segements. we can use that information to solve for the radius
[tex]\begin{gathered} radius=\frac{diameter}{2} \\ \text{diameter}=wx=xz=6 \\ \text{radius(r)}=\frac{6}{2}=3 \end{gathered}[/tex]let's insert this and other variables into our equation
[tex]\begin{gathered} L_{\text{arc}}=\frac{\theta}{360}\times2\pi r \\ \text{L}_{\text{arc}}=\frac{220}{360}\times2\times3.14\times3 \\ L_{\text{arc}}=11.513 \end{gathered}[/tex]from the calculations above, the length of the arc YZ is equal to 11.513
Find the slope of the secant line for the g(x) = -20 SQRT x between x = 2 and x = 3
Given:
Equation of line is,
[tex]g(x)=-20\sqrt[]{x}[/tex]The slope of the secant line between x =a and x= b is calculated as,
[tex]\begin{gathered} m=\frac{f(b)-f(a)}{b-a} \\ m=\frac{f(3)-f(2)}{3-2} \\ m=\frac{-20\sqrt[]{3}-(-20\sqrt[]{2})}{1} \\ m=-20\sqrt[]{3}+20\sqrt[]{2} \\ m=20(\sqrt[]{2}-\sqrt[]{3}) \\ m=-6.36 \end{gathered}[/tex]Answer: slope of the secant line is m = -6.36
What is the value of x in the triangle below?2460O 12813O 122O 12/3
The question gives us a right-angled triangle and find the value of x.
In order to solve the problem, we use SOHCAHTOA. In this case, we will use "SOH" from SOHCAHTOA because we have the Opposite as x and Hypotenuse as 24, while the relevant angle is 60 degrees.
Let us apply this formula:
[tex]\begin{gathered} \text{ SOH implies:} \\ \sin \theta=\frac{\text{Opposite}}{\text{Hypotenuse}} \\ \\ \theta=60^0,\text{Opposite}=x,\text{Hypotenuse}=24 \\ \\ \therefore\sin 60^0=\frac{x}{24} \end{gathered}[/tex]We simply need to make x the subject of the formula and we shall also represent sin 60 with its surd form.
This is done below:
[tex]\begin{gathered} \sin 60^0=\frac{x}{24} \\ \text{ Multiply both sides by 24} \\ 24\times\sin 60^0=\frac{x}{24}\times24 \\ \therefore x=24\times\sin 60^0 \\ \\ \sin 60^0=\frac{\sqrt[]{3}}{2} \\ \\ x=24\times\frac{\sqrt[]{3}}{2}=12\times2\times\frac{\sqrt[]{3}}{2}\text{ (2 crosses out)} \\ \\ x=12\sqrt[]{3} \end{gathered}[/tex]Therefore, the final answer is Option 4
Hello can someone help me in this pls i need it today now PLS i will give 25 points
Answer:
Look below
Step-by-step explanation:
Convert -8/5 into a decimal
-8/5 = -1 3/5 = -1.6
24 cm 12 cm find the volume of the figure and leave pi in the answer
Explanation:
The volume of a cone is one third the area of the base times the height of the cone:
[tex]V=\frac{1}{3}\pi r^2h[/tex]r is the radius of the base and h is the height.
In this problem, the radius is 12cm and the height is 24cm. The volume is:
[tex]V=\frac{1}{3}\pi\cdot12^2\cdot24=\pi\cdot\frac{144\cdot24}{3}=\pi\cdot\frac{3456}{3}=\pi\cdot1152[/tex]Answer:
The volume is V = 1152 π
Identify the following series as geometric or arithmetic. Also identify the series as infinite or finite.5, 10, 20, 40, 80, 160, 320geometricarithmeticinfinitefinite
the series is geometric and finite
Explanation:Given:
5, 10, 20, 40, 80, 160, 320
To find:
if the series is arithmetic or geometric; infinite or finite
a) For a series to be arithmetic, it must have a common difference
common difference = next term - previous term
For the series to be geometric, it must have a common ratio
common ratio = next term/previous term
We need to check if it has a common difference or common ratio
let next term = 10, previous term = 5
common difference = 10 - 5 = 5
let next term = 20, previous term = 10
common difference = 20 - 10 = 10
The difference is not common, it is different
common ratio = next term/previous term
let next term = 10, previous term = 5
common ratio = 10/5 = 2
let next term = 20, previous term = 10
common ratio = 20/10 = 2
The ratio is common
As a result, the series is geometric
b) Infinite series cannot be counted and totaled. This is because they do not end
Finite series can be counted and summed up. This is because the series has an end.
The series is finite
Answer:
geometric
finite
Step-by-step explanation:
Correct on Odyssey.
:)
set up an equation for your exterior angle, then use multi-step equation steps to solve for y.A. 15B. 17.4C. 5D. 10
In any triangle, the sum of the interior angles of two vertices is equal to the exterior angle of the other vertex.
Using this property, we can write the following equation:
[tex]\begin{gathered} \text{ABC+BAC=ACD}_{} \\ (4y+8)+(5y+3)=146 \\ 9y+11=146 \\ 9y=146-11 \\ 9y=135 \\ y=\frac{135}{9} \\ y=15 \end{gathered}[/tex]The value of y is equal to 15, therefore the correct option is A.
Double a number and add 12 and the result will be greater than 20. The number is less than 6. What is the number?
The following expression is equivalent to "double a number and add 12":
[tex]2x+12[/tex]since the result is greater than 20, we have the following:
[tex]\begin{gathered} 2x+12>20 \\ \Rightarrow2x>20─12=8 \\ \Rightarrow x>\frac{8}{2}=4 \\ x>4 \end{gathered}[/tex]the number is also less than 6. Then we have that:
[tex]4therefore, the number is 5how would I figure this out (this assignment is just a practice but I dont have any notes to look off of and I'm confused)
We have the following:
We have the following points that are on the graph:
(-2, 1); (0, -1); (2, 1); (4, 3)
We must evaluate each point in the functions to know which is correct
F
y = x - 1
[tex]y=-2-1=-3[/tex]the first point does not match, therefore this function is not correct
H
y = x^2 - 1
[tex]y=(-2)^2-1=4-1=3[/tex]the first point does not match, therefore this function is not correct
G
y = |x| - 1
[tex]\begin{gathered} y=|-2|-1=2-1=1 \\ y=|0|-1=0-1=-1 \\ y=|2|-1=2-1=1 \\ y=|4|-1=4-1=3 \end{gathered}[/tex]In this function, all the points coincide, therefore the answer to the question is the function G
936.1 ÷ 2.3how do i calculate this without a calculator
Using long division:
Move the decimal point in the divisor and the dividend 1 unit
Crystal earns $4.75 per hour mowing lawns. A. write a rule to describe how the amount of money M earned is a function of the number of hours H that mowing lawns. B. l how much does crystal earn if she works 1 hour and 15 minutes?
Given:
Crystal earns $4.75 per hour mowing lawns.
Let the money earned = M
And the number of hours = H
So, the relation between M and H will be :
[tex]M=4.75\cdot H[/tex]B. how much does crystal earn if she works 1 hour and 15 minutes?
Time = 1 hours and 15 minutes
AS 1 hour = 60 minutes
So,
[tex]H=1+\frac{15}{60}=1+\frac{1}{4}=1+0.25=1.25[/tex]Substitute with H to find M
So,
[tex]M=4.75\cdot1.25=5.9375[/tex]So, she will earn $5.9375
solve the system by subsitution method
Substitute Y = 3X - 6
in second equation
-15X + 5•(3X - 6) = -30
Now solve for X, cancel parenthesis
use a(b+c) = ab + ac
-15X + 15 X - 30 = -30
. -30 = -30
Then we see that, have infinite solutions
In consecuence, ANSWER IS
OPTION D) (x , 3x - 6 )
give an example of a positive tempature and a negative tempature that have a diffrence of 5 fedagree
We can think of temperatures above zero F and below zero F. For example weather conditions in cold places like Alaska.
In the morning, the temperature could be 2 degrees F (above zero)), but later towards the night, the temperature could be below zero in three units : -3 degrees F.
So the difference is the distance from zero to 2 (above) and the distance to zero from below 3 (below the zero mark. so these two differences from zero add up as 2 + 3 = 5
The way to do such in one go with math is to write the "difference" (normally associated with a SUBTRACTION, of the form: 2 - (-3), and therefore use that the negative (or opposite) of a negative number is a positive number:
- (-3) = +3
The same happens when we want to compare the difference between
9 - (-15) = 9 + 15 = 24
with the difference:
-15 - 9 = -24
The important thing is to consider the absolute value if we just want to find the number of units between the values, how many units they are separated.
And if we need to find what needs to be added or subtracted to one of them, at that point the sign of the difference is critical. This is because in one case we will need to add to get to the other number, while in the other case we need to subtract.
1) Is F increasing on the interval (2.10)? 2) List the interval(s) on which F is increasing. Justify your answer. 3) List the intervalis) on which F is decreasing Justify your answer. 4)List the value(s) of x at which has a local maximum. Justify your answer.5) List the value(s) of x at which F has a local minimum. Justify your answer. 6) Find the X -intercepts 7) Find the Y-intercepts.
1)
in the interval (2,5) decreases and then increases , but We cant say that it is growing since it had a fall in the middle, so isnt increasing
2)
(-8,-2) (0,2) (5,10)
It is increasing because, from left to right, it comes from a low point to a higher point
3)
(-10,-8) (-2,0) (2,5)
It is decreasing because, from left to right, it comes from a high point to a lower point
4)
x=-2 and 2
are the highest values of the function
5)
x=-8, 0 and 5
are the lowest values of the function
6)
x=-5, 0 and 5
values where y = 0, therefore intersects the x axis
7)
y=0
values where x = 0, therefore intersects the y axis
limit using L'Hopital's rule . I just want to make sure if my answer is correct or not?
In order to use L'Hopital's rule, it is necessary to rewrite the limit as the quotient of two functions. Notice that:
[tex]\begin{gathered} 6x^{\sin (4x)}=e^{\ln (6x^{\sin (ex)})^{}} \\ =e^{\sin (4x)\cdot\ln (6x)} \end{gathered}[/tex]Since the exponential function is a continuous function, then:
[tex]\lim _{\text{x}\rightarrow0}e^{\sin (4x)\cdot\ln (6x)}=e^{\lim _{x\rightarrow0}\sin (4x)\cdot\ln (6x)}[/tex]Find the following limit using L'Hopital's rule:
[tex]\lim _{x\rightarrow0}\sin (4x)\cdot\ln (6x)[/tex]Write the function as a fraction:
[tex]\lim _{x\rightarrow0}\frac{\ln (6x)}{(\frac{1}{\sin (4x)})}[/tex]Use L'Hopital's rule to rewrite the limit as the limit of the quotient of the derivatives:
[tex]\begin{gathered} \lim _{x\rightarrow0}\frac{(\frac{1}{x})}{(-\frac{4\cos(4x)}{\sin^2(4x)})}=\lim _{x\rightarrow0}-\frac{\sin ^2(4x)}{4x\cdot\cos (4x)} \\ =\lim _{x\rightarrow0}\sin (4x)\cdot\frac{\sin(4x)}{4x}\cdot\frac{-1}{\cos (4x)} \\ =\lim _{x\rightarrow0}\sin (4x)\cdot\lim _{x\rightarrow0}\frac{\sin(4x)}{4x}\cdot\lim _{x\rightarrow0}\frac{-1}{\cos (4x)} \\ =0\cdot1\cdot-1 \\ =0 \end{gathered}[/tex]Therefore:
[tex]\lim _{x\rightarrow0}6x^{\sin (4x)}=e^0=1[/tex]There is 1/5 of a foot of ribbon left onthe spool. If Brittany cuts it into 3equal pieces, how long (in feet) willeach piece be?
We know that
• There is 1/5 of a foot of ribbon.
If Brittany cuts it into 3 equal pieces, we have to divide to find the length of each piece.
[tex]\frac{\frac{1}{5}}{3}=\frac{1}{15}[/tex]Therefore, each piece is 1/15 of a foot long.An office uses paper drinking cups in the shape of a cone, with dimensions as shown.-23 in.4 in.To the nearest tenth of a cubic inch, what is the volume of each drinking cup?A. 2.5B. 7.9C. 23.7D. 31.7
According to the formula for volume of a cone and rounding to the nearest tenth of cubic inch, we find out that the volume of each drinking cup is 7.9 cubic inch. Thus, option B is correct.
From the given figure, we have
Diameter of the cone-shaped cups, d = [tex]2\frac{3}{4}[/tex] in = 2.75 in
Height of the cone-shaped cups, h = 4 in
We have to find out the volume of each drinking cup.
Since, d = 2.75 in (Given), we can say that
The radius of the cone-shaped cups, r = [tex]\frac{1}{2}*2.75[/tex]
=> r = 1.375 in
We know that the volume of a cone can be represented as -
[tex]V = \frac{1}{3} \pi r^{2}h[/tex]
Putting the value of radius, r and height, h in the above equation of volume of the cone, we get
Volume, [tex]V = \frac{1}{3} \pi r^{2}h[/tex]
=> [tex]V = \frac{1}{3}\pi (1.375)^{2}*4\\= > V = 7.919 in^{3}[/tex]
Thus, using the formula for volume of a cone and rounding to the nearest tenth of cubic inch, we find out that the volume of each drinking cup is 7.9 cubic inch. Thus, option B is correct.
To learn more about volume of a cone visit https://brainly.com/question/1984638
#SPJ9
Answer:According to the formula for volume of a cone and rounding to the nearest tenth of cubic inch, we find out that the volume of each drinking cup is 7.9 cubic inch. Thus, option B is correct.
Step-by-step explanation:
trig The last sub-problem of this section stumped me pls help
For this problem, we are given a triangle and we need to determine its height.
The distance of the UFO from point A is equal to the side c of the triangle, this side forms a right triangle with the height, where the height is the opposite cathetus from angle alpha and side c is the hypothenuse. We can use the sine relationship to determine the height, as shown below:
[tex]\begin{gathered} \sin(87.4)=\frac{h}{425.58}\\ \\ h=425.58\cdot\sin(87.4)\\ \\ h=425.58\cdot0.9989706=425.14 \end{gathered}[/tex]The height is approximately 425.14 km.
1/2 n + 3 < 5 how would it be shown on a graph
To solve this inequality we need to isolate the variable "n" on the left side.
[tex]\frac{1}{2}n<5-3[/tex]Since there was a "+3" on the left side we needed to change its side, by inverting the number's signal.
[tex]\begin{gathered} \frac{1}{2}n<2 \\ n<2\cdot2 \\ n<4 \end{gathered}[/tex]Since the variable we need to calculate was multiplying "1/2" we needed to multiply both sides by 2 in order to find its value. The solution is n < 4.
You recently bought a new car and arecurious how much it's value drops over timeYou do some research and find out that yourbrand of car depreciates 10% per year andyou bought it new for $12,000. Write anexponential equation to represent the valueof the car, f(x), based on the number of yearssince you bought it (x) (show work)A) how much will your car be worth after5 years?B) how much will your car be worth after12 years?
SOLUTION
The price of the car = $12,000
The depreciate by 10%
[tex]\begin{gathered} \text{ The depreciating value for the first year } \\ 12,000\times(\frac{10}{100})^1 \\ \text{Then} \\ 12,000\times0.1 \end{gathered}[/tex]Then
[tex]12,000-12,00(0.1)[/tex]Then
[tex]\begin{gathered} 12000(1-0.1) \\ 12,000(0.9) \end{gathered}[/tex]For the first year the depreciating value will be
[tex]12,000(0.9)[/tex]Base on the number of years, the exponential equation will be
[tex]\begin{gathered} f(x)=12,000(0.9)^x \\ \text{where } \\ x=\text{ number of years } \end{gathered}[/tex]Therefore
The exponential equation that represent the value of the car is
F(x)=12,000(0.9)^x
The price of the car in 5 yeras will be obtain by substituting x=5 into the equation above
[tex]\begin{gathered} f(x)=12,000(0.9)^x \\ \text{where x=5} \\ f(x)=12,000(0.9)^5=7085.88 \end{gathered}[/tex]The car will worth $7085.88 after 5 years
Similarly, The for 12 years we have x=12
[tex]f(x)=12,000(0.9)^{12}=3389.15[/tex]The car will worth $3389.15 after 12 years
PLS HELP 99 POINTS! GEOMETRY & ALGEBRA QUESTION
find m
a-52
b-142
c-24
d-50
e-64
Answer:
b
Step-by-step explanation:
∠ QRP and ∠ PRS are a linear pair and sum to 180° , that is
∠ QRP + 3x - 8 = 180 ( subtract 3x - 8 from both sides )
∠ QRP = 180 - (3x - 8) = 180 - 3x + 8 = 188 - 3x
the sum of the 3 angles in Δ PQR = 180° , that is
188 - 3x + x + 2 + 90 = 180
- 2x + 280 = 180 ( subtract 280 from both sides )
- 2x = - 100 ( divide both sides by - 2 )
x = 50
Then
∠ PRS = 3x - 8 = 3(50) - 8 = 150 - 8 = 142°