Answer:
x = 9
Step-by-step explanation:
x + 4 = 2x - 5
x = 4 + 5
x = 9
Let's check our work.
9 + 4 = 9 x 2 - 5
13 = 18 - 5
13 = 13
It does work
Hope that helps!
Answer:
x= 9
Step-by-step explanation:
I do kumon and I'm asian
Round the following to the nearest penny.
2.345
.
Answer:
2.35
Step-by-step explanation:
giving brainliest!’ *easy*
Which of the following shows the prime factorization of 200 using exponential notation?
Answer:
The prime factorization of 200 using exponential notation is [tex]2^{3}\times 5^{2}[/tex].
Step-by-step explanation:
First, we decompose the number given on statement by applying prime numbers in ascending order. We see that 200 is an even number, therefore, we infer that smallest prime number within is 2.
1) [tex]\frac{200}{2} = 100[/tex] (Even number)
2) [tex]\frac{100}{2} = 50[/tex] (Even number)
3) [tex]\frac{50}{2} = 25[/tex] (Even number)
4) [tex]\frac{25}{5} = 5[/tex] (Odd number, not a multiple of 3, but a multiple of 5 since last digit is 5)
5) [tex]\frac{5}{5} = 1[/tex] (Odd number, not a multiple of 3, but a multiple of 5 since last digit is 5)
Now, we construct the prime factorization using exponential notation:
[tex]200 = 2^{3}\times 5^{2}[/tex]
The prime factorization of 200 using exponential notation is [tex]2^{3}\times 5^{2}[/tex].
Answer:
2 * 3 * 5
Step-by-step explanation:
made a 100 on the text trust!!!!!
a rectangle has length 8cm the area is 20cm^2
Answer:
Since Rectagle area is found by Length * Width, 20/8 would give the width of 2.5cm, if the length was increased by 2cm, and the area by 4cm, you would now do 24/10 to get the width which is 2.4, 5 percent of 2.5 is found by multiplying 2.5 by 0.05 which is 0.125, and 2.4 is only .1 less from 2.5 so yes noah is indeed correct, for that the width is decreased by less than 5%
Step-by-step explanation:
how many 1/4 yard pieces can caleb cut from the first piece of wood
The visibility, in miles, from a certain spot on a hillside can be calculated using the function d=1.8x, where x is the height in feet above the valley floor. Fanon walks through elevations ranging from 16 feet to 25 feet above the valley. What are the minimum and maximum distances that she can see?
Answer:
23 i think im not allway right
Step-by-step explanation:
The area of a rectangular sign is 51 square feet. The base of the sign is 6 feet. What is the height of the sign?
A: 7.75 feet
B: 9 feet
C: 8.5 feet
D: 8.75 feet
Answer:
c
Step-by-step explanation:
PLEASE SOLVE THE QUESTION BELOW
9514 1404 393
Answer:
(3.5, 4.5)
Step-by-step explanation:
That point will be the midpoint of either diagonal.
(A +C)/2 = ((-1, 3) +(8, 6))/2 = (-1+8, 3+6)/2 = (7, 9)/2 = (3.5, 4.5)
The center of the rhombus is (3.5, 4.5).
In 1980 a movie ticket cost $2.50. Now a movie ticket costs about $10.
What is the percent change? Percent increase or decrease?
I
HELLLLLPPPPPPPPP PLZZZZZZZZZZZZZZ
Answer:
D :)
Step-by-step explanation:
Because all of them are added by 12 constantly
Answer:
D
Step-by-step explanation:
because it represents 12 + x
1 + 12 = 13
2 + 12 = 14
etc
PLATO!! Please help!
Cara belongs to a knitting group that meets at the local craft shop. From observations, she has hypothesized that people purchase knitting
needles only if they are also purchasing yarn.
To confirm her thinking, Cara surveyed five people who came into the shop at various times throughout the day and asked them about their
past purchases.
Which of these factors is the most likely to skew the results of Cara's observations?
А. The participants are not randomized.
B. The sample size is too small to represent the population,
C. People have to buy yarn at a craft shop.
D. A control group is needed for an observational study.
Answer:
B. The sample size is too small to represent the population
Step-by-step explanation:
Logically speaking, this is correct because out of an ENTIRE day of customers entering a craft shop, more than 5 people enter the store. Due to this, Cara should've surveyed a larger number of customers.
A man wants to determine the height of the lighthouse. he measured the angle at A and found that tan A = 3/4. What is the height of the lighthouse if A is 40 m from the base?
Answer:
The height of the lighthouse is of 30m.
Step-by-step explanation:
This situation can be represented by a right triangle.
The tangent of the angle is 3/4.
The tangent in a right triangle is given by the opposite side divided by the adjacent side.
What is the height of the lighthouse if A is 40 m from the base?
The height of the light house is the opposite side, which we want to find.
The distance is the adjacent side, which we have that is 40. So
[tex]\tan{A} = \frac{x}{40}[/tex]
[tex]\frac{3}{4} = \frac{x}{40}[/tex]
[tex]4x = 40*3[/tex]
[tex]4x = 120[/tex]
[tex]x = \frac{120}{4}[/tex]
[tex]x = 30[/tex]
The height of the lighthouse is of 30m.
please help me i really need help please
What is the length of X
Answer:
37.21
Step-by-step explanation:
try the suggested option (see the attachment), the answer is marked with black colour.
Evaluate each expression if m= -4, n=1, p = 2, q=-6, r = 5, and t = -2.
|q-2mt|
Answer:
hi
Step-by-step explanation:
9xy + 5y +
On a certain IQ test, eleven people averaged a 101.5. A certain reality TV star took
the test and the average fell to 98.04. What is their IQ?
Answer:
59.98
Step-by-step explanation:
To find the average of a set of numbers, we sum them all together and divide them by the size of the set. Here, we start out with 11 IQ scores. We don't know what they are, but we can still set up an equation with the information we do have. Let's call the sum of those 11 score s. The average must be s/11, which we know is 101.5. With that, we can set up and solve and equation for s:
[tex]\dfrac{s}{11}=101.5\\s=101.5(11)\\s=1116.5[/tex]
Let's call the score of the reality TV star r. If we add their score to the set, we now have 12 scores. The sum of those scores is gonna be the sum of the previous scores, 1116.5, plus the reality TV star's score, r. To find the average, we divide the sum by 12. Finally, we're told that this average is exactly 98.04. Putting all of this into an equation gives us
[tex]\dfrac{1116.5+r}{12}=98.04[/tex]
We can now solve for r algebraically, first by multiplying both sides by 12:
[tex]1116.5+r=98.04(12)\\1116.5+r=1176.48[/tex]
And then subtracting 1116.5 from both sides:
[tex]r=1176.48-1116.5\\r=59.98[/tex]
Write an equation of the line in slope-intercept from (answer fast pls )
Y=
3 x 10^5 in standard notation?
Step-by-step explanation:
3 * 10^5 in standard notation
= 300000
Hope it will help :)❤
Which of the following is a y-coordinate from the solution set of the system of equations y = -x + 1 and
y = x² + 5x + 6.
A. 0
B. 2
C. -4
D.-1
The gypsy moth is a serious threat to oak and aspen trees. A state agriculture department places traps throughout the state to detect the moths. When traps are checked periodically, the mean number of moths trapped is only 0.7, but some traps have several moths. The distribution of moth counts is discrete and strongly skewed, with standard deviation 0.8.
A) What are the mean and standard deviation of the average number of moths x in 60 traps?
B) Use the central limit theorem to find the probability (±0.01) that the average number of moths in 40 traps is greater than 0.4.
Answer:
a) The mean is 0.7 and the standard deviation is 0.1033.
b) 99.11% probability that the average number of moths in 40 traps is greater than 0.4.
Step-by-step explanation:
To solve this question, we need to understand the normal probability distribution and the central limit theorem.
Normal Probability Distribution:
Problems of normal distributions can be solved using the z-score formula.
In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the zscore of a measure X is given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
Central Limit Theorem
The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean [tex]\mu[/tex] and standard deviation [tex]s = \frac{\sigma}{\sqrt{n}}[/tex].
For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.
When traps are checked periodically, the mean number of moths trapped is only 0.7, but some traps have several moths. The distribution of moth counts is discrete and strongly skewed, with standard deviation 0.8.
This means that [tex]\mu = 0.7, \sigma = 0.8[/tex]
A) What are the mean and standard deviation of the average number of moths x in 60 traps?
60 traps means that [tex]n = 60[/tex]
By the Central Limit Theorem
Mean [tex]\mu = 0.7[/tex]
Standard deviation [tex]s = \frac{0.8}{\sqrt{60}} = 0.1033[/tex]
The mean is 0.7 and the standard deviation is 0.1033.
B) Use the central limit theorem to find the probability (±0.01) that the average number of moths in 40 traps is greater than 0.4.
40 traps means that [tex]n = 40[/tex]
Mean [tex]\mu = 0.7[/tex]
Standard deviation [tex]s = \frac{0.8}{\sqrt{40}} = 0.1265[/tex]
This probability is 1 subtracted by the pvalue of Z when X = 0.4. So
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
By the Central Limit Theorem
[tex]Z = \frac{X - \mu}{s}[/tex]
[tex]Z = \frac{0.4 - 0.7}{0.1265}[/tex]
[tex]Z = -2.37[/tex]
[tex]Z = -2.37[/tex] has a pvalue of 0.0089
1 - 0.0089 = 0.9911
99.11% probability that the average number of moths in 40 traps is greater than 0.4.
Write an equation to represent the hanger.
Explain how to reason to find the value of x.
Answer:
Step-by-step explanation:
HELP IM LITERALLY IN CLASS AND IM TAKING A TEST
Given the points (4,-3) and (0, -1), which other point lies on the line?
What is the missing value for x?
Answer:
10=30
................
Answer:
each number in the first column would be multiplied by 3 in the second column.
so 10*3=30
i’m having problems solving this too
Answer and Step-by-step explanation:
Half of them should be plain, so 46 plain bagels .
This is because the first set was split evenly, so that must mean this set should be split evenly as well.
Half of 92 is 46.
#teamtrees #PAW (Plant And Water)
If two different data sets have the same mean, the one with a wider range gives a better representation of its data.
Answer:
if this is a true or false question the answer would be true
Find the slope from the graph below
Answer: y2-y1/x2-x1=-1-3/3-3=-4/0=undefined.
Step-by-step explanation:
Write a report to the president of the company explaining the meaning of the solutions
Step-by-step explanation:
x is less than -10
x is greater than or equal to 25
Answer:
The negative part of the solution set is ignored, because you cannot produce a negative number of phones.
The company has at least an 80% success rate if the next 25 or more phones that are assembled work.
Because the company has already made 10 phones and 7 are not working, if the next 25 phones work, the 35th phone puts the company at its goal of 80% or more.
Step-by-step explanation:
edge 2021
In a small sporting good store there are 3 managers, 8
salesmen, and 5 cashiers. If a person is selected at random,
what is the probability that the person is a cashier or a
manager?
Answer:
1/2
Step-by-step explanation:
There are 16 people in total.
Cashiers and managers together total 8 people.
8/16 people are cashiers and managers, which equates to 1/2.
solve for x if,
3^2x+1 - 4 (3^x) = -1
Answer:
x=1.11772568, -0.48679593
I think this is right, hope it helps!
Answer:
[tex]x= 1.117725689 , -0.486795935...[/tex]
Step-by-step explanation:
[tex]3^{2x}+1-4(3^{x})=-1\\[/tex]
Let y=3^x
Rewrite in:
[tex]y^2+1-4y=-1\\y^2-4y=-2\\(y-2)^2=2\\y=2+\sqrt{2}, 2-\sqrt{2} \\y=3^{x}\\x=log(y)/log(3)\\x=\frac{log(2+\sqrt{2} )}{log(3)} , \frac{log(2-\sqrt{2}) }{log(3)} \\\\x= 1.117725689 , -0.486795935...[/tex]
55" TV: $669 with a 23% markup
Answer:
what is the question?
Step-by-step explanation: