Answer:
x=0, y=0
x=2, y=4
Step-by-step explanation:
x^y= y^xy= 2xx^(2x)= (2x)^x(x^2)^x= (2x)^xx^2=2xx(x-2)=0x=0 ⇒ y=0x=2 ⇒ y=4Answer:
x = 2, y = 4.
Step-by-step explanation:
x^y = y^x
Substitute y = 2x in the above:
x^2x = (2x)^x
x^2x = 2*x * x^x Divide both sides by x^x:
x^2x / x^x = 2*x
x^(2x-x) = 2^x
x^x = 2^x
So x = 2.
and y = 2x = 4.
We can also make x = 0 and y = 0 but
I'm not sure if this result is valid because 0^0 is undefined.
Looking further into this there seems to be different opinions on this with some mathematicians say 0^0 = 1, so x=0, y = 0 may be acceptable.
Please help me find the end behavior!:(
Answer:
D
Step-by-step explanation:
This is an odd degree polynomial (the highest degee is an odd number) so both ends will be in different directions, one will be up the other will be down. So rule out any option that has p(x) pointing in the same direction (A & C)
Now we are between B & D. Look at the leading coefficient 6 which is positive so we know that the left end goes down and the right end goes up. If the lc was negative the opposite would be true. So
D is the right answer
Jacqueline and Maria set up bug barns to catch lady bugs. Jacqueline caught ten more than three times the number of lady bugs that Maria caught. If c represents the number of lady bugs Maria caught, write an expression for the number of lady bugs that Jacqueline caught.
Answer:
(CX3)+10
Step-by-step explanation:
Answer:
c×3+10= j
Step-by-step explanation:
There are (7^13)^3 x 7^0 strawberries in a field . What is the total number of strawberries in the field
Answer:
Step-by-step explanation:
[tex]7^{0}=1[/tex]
[tex](7^{13})^{3}*7^{0}=7^{13*3}*1\\\\=7^{39}[/tex]
What is 200 percent of (0.020(5/4) + 3 ((1/5) - (1/4)))
Answer:
0.1/4-3/20=1/40-6/40=-1/8 200% of this is -1/4
Step-by-step explanation:
This shows that 200 percent of (0.020(5/4) + 3 ((1/5) - (1/4))) is -2.75
Given the expression as shown in the question:
[tex]200\% \ of \ [0.020(\frac{5}{4} )+3(\frac{1}{5}- \frac{1}{4} )][/tex]
Expand the expression in the square bracket using the distribution law as shown:
[tex]=200\% \ of \ [0.020(\frac{5}{4} )+3(\frac{4-5}{20} )]\\=200\% \ of \ [0.020(\frac{5}{4} )+3(\frac{-1}{20} )]\\=200\% \ of \ [0.020(\frac{5}{4} )-(\frac{3}{20} )]\\=200\% \ of \ [0.020(1.25 )-\frac{3}{20}]\\=\frac{200}{100} \times [0.025-0.15]\\=2 \times [-0.125]\\=-2.75[/tex]
Hence the correct answer to the expression is -2.75.
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If Q(x) = x2 – X – 2, find Q(-3).
Answer:
10
Step-by-step explanation:
for this you need to sub the value of -3 for x
Q(-3)=(-3)^2-(-3)-2
=9+3-2
=10
Answer:
Q= x - X/x - 2/x
Step-by-step explanation:
hope this helps !
Find tan , sin , and seco, where 0 is the angle shown in the figure.
Give exact values, not decimal approximations.
Answer:
tan(θ) = 5/3sin(θ) = 5√34/34sec(θ) = √34/3Step-by-step explanation:
The hypotenuse is given by the Pythagorean theorem:
h = √(3² +5²) = √34
The trig functions are the ratios of sides:
Tan = Opposite/Adjacent
tan(θ) = 5/3
__
Sin = Opposite/Hypotenuse
sin(θ) = 5/√34 = (5/34)√34
__
Sec = Hypotenuse/Adjacent
sec(θ) = √34/3
Ann spent 1/3 of her money on transport, 2/5 on food, 1/6 on clothing and saved $80.00. How much money did she have to begin with?
Answer:
Her initial money she started with us $800.00
Step-by-step explanation:
Let the initial money Ann began with be x.
So she spent 1/3 of x on transport,
2/5 of x on food
1/6 of x on clothing
And the remaining is $80.00.
Let's find the value of x
X(1/3) +x(2/5) + x(1/6) +80 = x
X(1/3) +x(2/5) + x(1/6) -x = -80
Taken 30 as the lowest common multiple of the factors gives
(10x + 12x + 5x -30x)/30 = -80
(10x + 12x + 5x -30x)= -2400
-3x = -2400
X = -2400/-3
X= 800
enson is picking out what to wear to school. He has three clean T-shirts: one white, one red, and one orange. He also has two clean pairs of jeans: one blue and one gray. The tree diagram shows the different outcomes of picking a pair of jeans and a T-shirt. What is the missing color in the diagram? A. blue B. orange C. red D. white
Answer:
white
Step-by-step explanation:
plato
The solution is Option D.
The missing color from the tree diagram is given by the equation A = white
What is an Equation?Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.
It demonstrates the equality of the relationship between the expressions printed on the left and right sides.
Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.
Given data ,
Let the missing color from the tree diagram be represented as A
Now , the value of A is
Jenson has 3 clean T-shirts of white , red and orange
Jenson has 2 clean pairs of jeans of blue and gray
Now , substituting the values in the equation , we get
For every blue jeans = { white , red , orange }
For every gray jeans = { A , red , orange }
From the equation , we get
The value of A = white
Therefore, the value of A is white
Hence , the missing color is white
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F (X) = x² - 2x and 6(x) = 3x+1
A) Find F(g(-4))
B) Find F(g(x)) simply
C) find g^-1 (x)
Answer: See bolded below
Step-by-step explanation:
With the given f(x) and g(x) given, we can directly plug them in to solve. The inverse is to replace the y with x and x with y, then solve for y.
A. f(g(-4))=143
g(-4)=3(-4)+1
g(-4)=-12+1
g(-4)=-11
With g(-4), we plug that into f(x) to find f(g(-4)).
f(-11)=(-11)²-2(-11)
f(-11)=121+22
f(-11)=143
------------------------------------------------------------------------------------
B. 9x²-1
(3x+1)²-2(3x+1)
(9x²+6x+1)-6x-2
9x²-1
------------------------------------------------------------------------------------
C. g⁻¹(x)=(x-1)/3
x=3y+1
x-1=3y
(x-1)/3=y
A total of 259 tickets were sold to a benefit concert for a total of $5,312. Two types of tickets were sold: adult tickets were sold for $24 each and student tickets were sold for $16 each. How many student tickets were sold?
Answer:
113
Step-by-step explanation:
Let the number of adult tickets sold =a
Let the number of student tickets sold =s
A total of 259 tickets were sold, therefore:
a+s=259
Adult tickets were sold for $24 each and student tickets were sold for $16 each.
Total Revenue = $5,312
Therefore:
24a+16s=5,312
We solve the two derived equations simultaneously.
From the first equation
a=259-s
Substitute a=259-s into 24a+16s=5,312
24(259-s)+16s=5,312
6216-24s+16s=5,312
-8s=5,312-6216
-8s=-904
Divide both sides by -8
s=113
Therefore, 113 student tickets were sold.
Carleen has 104 pieces of candy leftover from Halloween. She would like to distribute them evenly to the 8 kids on her block. Write an equation to show how many pieces of candy each kid will receive.
Answer:
8x = 104
x = 13
Step-by-step explanation:
Since we are trying to distribute it evenly, we divide 104 by 8 to get 13 pieces of candy per child.
The equation is saying 8 kids times x amount of candy per kid is equal to a total amount of 104 pieces of candy.
Answer:
Each kid will get 13 pieces of candy.
Step-by-step explanation:
If Carleen has 104 pieces of candy leftover from Halloween, and she splits the candy with 8 of the kids on her block, each kid gets 13 pieces. I know this because you divide:
104 divided by 8 equals 13
The quotient of y and 3
Answer:
[tex]\frac{y}{3}[/tex]
Step-by-step explanation:
Well the quotient is the answer if y divided by 3.
So y divided by 3 is y over 3 y/3.
AT&T would like to test the hypothesis that the proportion of 18- to 34-year-old Americans that own a cell phone is less than the proportion of 35- to 49-year-old Americans. A random sample of 200 18- to 34-year-old Americans found that 126 owned a smartphone. A random sample of 175 35- to 49-year-old Americans found that 119 owned a smartphone. If Population 1 is defined as 18- to 34-year-old Americans and Population 2 is defined as 35- to 49-year-old Americans, the correct hypothesis statement for this hypothesis test would be
Answer:
The null and alternative hypothesis can be written as:
[tex]H_0: \pi_1-\pi_2=0\\\\H_a:\pi_1-\pi_2< 0[/tex]
Step-by-step explanation:
This is a hypothesis test for the difference between proportions.
The claim is that the proportion of 18- to 34-year-old Americans that own a cell phone is less than the proportion of 35- to 49-year-old Americans.
This claim will be reflected in the alternnative hypothesis, that will state that the population proportion 1 (18 to 34) is significantly smaller than the population proportion 2 (35 to 49).
On the contrary, the null hypothesis will state that the population proportion 1 is ot significantly smaller than the population proportion 2.
Then, the null and alternative hypothesis can be written as:
[tex]H_0: \pi_1-\pi_2=0\\\\H_a:\pi_1-\pi_2< 0[/tex]
The significance level is assumed to be 0.05.
The sample 1, of size n1=200 has a proportion of p1=0.63.
[tex]p_1=X_1/n_1=126/200=0.63[/tex]
The sample 2, of size n2=175 has a proportion of p2=0.68.
[tex]p_2=X_2/n_2=119/175=0.68[/tex]
The difference between proportions is (p1-p2)=-0.05.
[tex]p_d=p_1-p_2=0.63-0.68=-0.05[/tex]
The pooled proportion, needed to calculate the standard error, is:
[tex]p=\dfrac{X_1+X_2}{n_1+n_2}=\dfrac{126+119}{200+175}=\dfrac{245}{375}=0.653[/tex]
The estimated standard error of the difference between means is computed using the formula:
[tex]s_{p1-p2}=\sqrt{\dfrac{p(1-p)}{n_1}+\dfrac{p(1-p)}{n_2}}=\sqrt{\dfrac{0.653*0.347}{200}+\dfrac{0.653*0.347}{175}}\\\\\\s_{p1-p2}=\sqrt{0.001132+0.001294}=\sqrt{0.002427}=0.049[/tex]
Then, we can calculate the z-statistic as:
[tex]z=\dfrac{p_d-(\pi_1-\pi_2)}{s_{p1-p2}}=\dfrac{-0.05-0}{0.049}=\dfrac{-0.05}{0.049}=-1.01[/tex]
This test is a left-tailed test, so the P-value for this test is calculated as (using a z-table):
[tex]\text{P-value}=P(z<-1.01)=0.1554[/tex]
As the P-value (0.1554) is bigger than the significance level (0.05), the effect is not significant.
The null hypothesis failed to be rejected.
There is not enough evidence to support the claim that the proportion of 18- to 34-year-old Americans that own a cell phone is less than the proportion of 35- to 49-year-old Americans.
Rachel measures the lengths of a random sample of 100 screws. The mean length was 2.6 inches, with a standard deviation of 1.0 inches. Using the alternative hypothesis (µ < µ0), Rachel found that a z-test statistic was equal to -1.25. What is the p-value of the test statistic? Answer choices are rounded to the thousandths place.
Answer:
Step-by-step explanation:
Using the alternative hypothesis (µ < µ0),
To find the p-value with test statistic -1.25 and assuming a standard level of significance of 0.05, using a p value calculator, the p-value is 0.1057 which is great that 0.05. Thus, the results is not significant.
Using the p value calculation.
1. Check the left tailed z table as the test statistic is negative,
2. Then find the probabilitythat z is greater than your test statistic (look up your test statistic on the z-table- the value under 1.2 and 0.05 which is 0.8944
3. Then, find its corresponding probability, and subtract it from 1 to get your p-value- 1-0.8944 = 0.1056.
Help with one integral problem?
Answer: [tex]2\sqrt{1+tant}+C[/tex]
Step-by-step explanation:
To integrate means to find the antiderivative of the function. For this problem, we can use u-substitution.
[tex]\int\limits {\frac{dt}{cos^2t\sqrt{1+tant} } } \[/tex]
Let's first use our identities to rewrite the function. Since [tex]\frac{1}{cosx} =secx[/tex], we can use this identity.
[tex]\int\limits {\frac{sec^2t}{\sqrt{1+tant} } } \,[/tex]
[tex]u=\sqrt{1+tant}[/tex]
[tex]du=\frac{sec^2t}{2\sqrt{1+tant} } dt[/tex]
Now that we have u and du, we can plug them back in.
[tex]\int\limits {2} \, du[/tex]
[tex]\int\limits{2} \, du=2u[/tex]
Since we know u, we can plug that in.
[tex]2\sqrt{1+tant}[/tex]
This may seem like the correct answer, but we forgot to add the constant.
[tex]2\sqrt{1+tant}+C[/tex]
How do you write 89,700,000,000 in scientific notation? ___× 10^____
Answer:
It's written as
[tex]89.7 \times {10}^{9} [/tex]
Or
[tex]8.97 \times {10}^{10} [/tex]
Hope this helps you
Answer:
8.97 * 10 ^10
Step-by-step explanation:
We want one nonzero digit to the left of the decimal
8.97
We moved the decimal 10 places to the left
The exponent is positive 10 since we moved 10 places to the left
8.97 * 10 ^10
the length of a rectangular sheet of metal is 9.96m and it's breadth is 5.08m. Find the area of the metal.Correct the answer to 2 significant figures and then correct the answer to 0.1 meter square
Answer:
The area of the sheet is approximately 50.59 m² or 50.6 m²
Step-by-step explanation:
The area of a rectangle is given by the following expression:
[tex]area = width*height[/tex]
Since breadth is the same as the width of the sheet, we can calculate its area as shown below:
[tex]area = 9.96*5.08 = 50.59[/tex]
The area of the sheet is approximately 50.59 m² or 50.6 m²
Write the equation of a line that goes through point (0, -8) and has a slope of 0
Answer:
Step-by-step explanation:
y + 8 = 0(x - 0)
y + 8 = 0
y = -8
Ava's bacteria population is modeled by an equation. Chase models his bacteria
population with a graph. Ava says that on day 14, she will have more bacteria than Chase
Is she right? Why or why not?
Answer:
P(Chase) > P(Ava)
700 > 587
Therefore, Ava's claim is wrong!
On day 14, Chase's bacteria population will be greater than Ava's bacteria population.
Step-by-step explanation:
Please refer to the attached image.
Ava's bacteria population is modeled by the following equation.
[tex]$ b(t) = 200(1+0.08)^t $[/tex]
Where t is time in days and b(t) is the population of the bacteria after t days.
The graph represents the population of Chase's bacteria.
Ava claims that on day 14, she will have more bacteria than Chase.
Let us compare the population of both bacteria.
Chase bacteria population when t = 14 days:
From the graph, the population is approximately 700 at t = 14 days
P(Chase) ≈ 700
Ava bacteria population when t = 14 days:
at t = 14 days
[tex]b(t) = 200(1+0.08)^t \\\\ b(14) = 200(1.08)^{14} \\\\ b(14) = 200 (2.93719)\\\\ b(14) = 587.44[/tex]
So, the population is approximately 587 at t = 14 days
P(Ava) ≈ 587
P(Chase) > P(Ava)
700 > 587
Therefore, Ava's claim is wrong!
On day 14, Chase's bacteria population will be greater than Ava's bacteria population.
Answer:
D
Step-by-step explanation:
Trust
A square has a perimeter of 12x+52 units. Which expression represents the side leagth of the square in units
Answer:
12x/2 or 52/2
Step-by-step explanation:
Ok, perimeter is length+length+width+width. 12x/2 and 52/2 could are probably the answers.
Thompson's hardware spent $66,170 this year on general insurance alone. if total sales were $713,200, what percent total sales was spent on general insurance? round to the nearest tenth of a percent, if necessary.
Answer:
We have our answer as approximately 10 %
Step-by-step explanation:
We are simply expected to express the sum of money spent on insurance as a percentage of the total sales in this question.
The first step is to set up a fraction, having the sum spent on insurance as the numerator, and the total sales as the denominator. This is shown below
[tex]\frac{66,170}{713,200}[/tex]
To convert this fraction to a percentage, we will have to multiply it by 100 and reduce it to its lowest term.
Here we have
[tex]\frac{66,170}{713,200} \times 100= 9.28 percent[/tex]
Rounding of to the nearest tenth, we have our answer as approximately 10 %
Compute Δy and dy for the given values of x and dx = Δx. (Round your answers to three decimal places.) y = ex, x = 0, Δx = 0.4
Answer:
0.492
Step-by-step explanation:
According to the given situation, the calculation of Δy and dy is shown below:-
[tex]y = e^x, x = o, \Delta x = 0.6[/tex]
[tex]dy = f'(x) = e^x[/tex]
[tex]dy = e^x dx[/tex]
[tex]= e^x (0.4)[/tex]
[tex]dy = 0.4e^x[/tex]
[tex]\Delta y = f(0.4) - f(0)[/tex]
[tex]= e^{0.4} - e^0[/tex]
Now we use the scientific calculator or spreadsheet to determine the exponential value
= 1.491824698 - 1
= 0.491824698
or
= 0.492
Therefore for computing the Δy and dy we simply applied the above formula.
Hence, the answer is 0.4918
Which data set is accurate and precise based on a correct value of 30?
Set 1: 30, 35, 32, 30, 29
Set 2: 15, 16, 12, 15, 14
Set 3: 19, 30, 78, 43, 30
Set 4: 30, 30, 67, 12, 90
Answer:
Set 1: 30, 35, 32, 30, 29
Step-by-step explanation:
Let's first clarify what is accurate and precise:
Precise is based on how close two or more measured values are to each other. While something is said to be accurate, when the standard value values are close, which in our case is 30.
Therefore, we analyze each set:
Set 1: 30, 35, 32, 30, 29
This set is precise and accurate, since 2 values are 30 and all their values are close to each other.
Set 2: 15, 16, 12, 15, 14
This set is precise, because all of its values are close but not accurate.
Set 3: 19, 30, 78, 43, 30
This set is somewhat accurate because there are 2 values of 30, but it is not precise because its values are separate.
Set 4: 30, 30, 67, 12, 90
It is the same case of Set 3.
Therefore the answer is Set 1.
Answer:
Set 1: 30, 35, 32, 30, 29
Step-by-step explanation:
What is the value of 500$ invested at 4% interest compounded annually for 7 years
Answer:
657.96
Step-by-step explanation:
use formula A=P(1+r/n)^nt
A=500(1+.04/1)^1*7
A=500(1.04)^7
A=500(1.3159~)
A= 657.96~
Una persona se dirige a un edificio y observa lo alto del mismo con un ángulo de elevación “x”, después de caminar 10m observa al mismo punto anterior con ángulo de elevación “y”, si la altura del edificio es de 30m. Calcule: "3Tgx.Ctgy + Tgx"
Answer:
3
Step-by-step explanation:
To begin with notice that
[tex]\displaymode{ \tan(x) = \frac{30}{10 + 30\cot(y)} }[/tex]
From that equation you get that
10 tan(x) + 30tan(x) cot(x) = 30
therefore
tan(x) + 3 tan(x) cot(x) = 3
The hypotenuse of a right triangle is 10 cm long. One of the triangle’s legs is 3
times the length of the other leg. Find the lengths of the two legs of the
triangle. Round to the nearest tenth if necessary
Answer:
one side is [tex]\sqrt{10}[/tex] and other 3[tex]\sqrt{10}[/tex]
in decimal one side = 3.16
other side = 9.48
Step-by-step explanation:
In right angle
if two sides containing right angle is a and b and h is hypotenuse then
by Pythagoras theorem
a^2 + b^2 = h^2
__________________________________
let one side be x
given
One of the triangle’s legs is 3 times the length of the other leg
then other leg = 3x
given h = 10 cm
applying Pythagoras theorem
[tex]a^2 + b^2 = h^2\\x^2 + (3x)^2 = 10^2\\x^2 + 9x^2 = 100\\10x^2 = 100\\x^2 = 100/10 = 10\\x = \sqrt{10}[/tex]
Thus, one side is [tex]\sqrt{10}[/tex] and other 3[tex]\sqrt{10}[/tex]
[tex]\sqrt{10} = 3.16\\[/tex]
thus, in decimal one side = 3.16
other side = 3.16*3 = 9.48
The rat population in major metropolitan city is given by the formula n(t)=89e^0.02t where t is measured in years since 1991 and n(t) is measured in millions. What does the model predict the rat population was in the year 2007?
Answer:
122.6 million
Step-by-step explanation:
Figure the value of t, then put that into the formula and do the arithmetic.
t = 2007 =1991 = 16
n(16) = 89e^(0.02·16) = 89·e^0.32 ≈ 122.6
The model predicts a rat population of 122.6 million in 2007.
What is the greatest common factor of the polynomial below?
20x^3 - 14x
Answer:
the correct answer is 2x
Answer:
D. 2x
Step-by-step explanation:
20x² : 1, 2, 4, 5, 10, 20, x
14x : 1, 2, 7, 14, x
The greatest common factor of the polynomial is 2x.
2x(10x² - 7)
Enter a range of value for x.
Answer:
-2 < x < 35
Step-by-step explanation:
We have that the larger side has a larger opposite angle and the smaller sides and a smaller opposite angle.
The opposite angle of the 14 unit side is 37 °.
The opposite angle of the 13-unit side is (x + 2) °.
Since 13 <14, it would be:
x + 2 <37
we subtract 2 on both sides
x <35
The value of x must be less than 35.
Now, to form a triangle, the angle must be greater than 0.
x + 2> 0
we subtract 2 on both sides
x> -2
The value of x must be greater than - 2.
Therefore the answer would be:
-2 <x <35
PLEASE HELP ASAP One day it took nick 20 mins to drive to work. His average speed was 27mph. When he had drove home using the same route, it had took Nick 45 minutes. work out the average speed of his journey in mph please.
Answer: 12 mph
Step-by-step explanation:
20 minutes = 1/3 hour
Distance = speed x time
D = 27 x 1/3 = 09 miles
He had taken 45 minutes when he drove home
45 minutes = 3/4 hour
Speed = distance / time
Speed = 9 / 3/4
Speed = 12 mph
The average speed of Nick's journey back home is 12 mph.
What is the average speed?Average speed is calculated by dividing a quantity by the time required to obtain that quantity. Meters per second is the SI unit of speed. The formula S = d/t, where S is the average speed, d is the total distance, and t is the total time, is used to determine average speed.
The first average speed at what Nick travels is 27 mph.
One day it took Nick 20 mins to drive to work.
Here, Distance = Speed × Time
= 27 × 20/60
= 27 × 1/3
= 9 miles
Nick had drove home using the same route, it had took Nick 45 minutes.
Here, speed = Distance/Time
= 9÷45/60
= 9×4/3
= 12 mph
Therefore, the average speed of Nick's journey back home is 12 mph.
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