Answer:
sure
Step-by-step explanation:
i'll go to your profile and do your next/latest question.
Answer:
sure whats up ? whats the question
-4x -2y = -12
4x + 8y = -24
x= 6 and y= -6
Step-by-step explanation:
Answer:
x = 6, y = -6
Step-by-step explanation:
After adding the equations together, the 4x and -4x cancel each other out. This makes our new equation:
6y = -36
Divide both sides by 6
y = -6
Plug -6 into y in one of the equations
4x + 8y = -24 =
4x + 8(-6) = -24 =
4x - 48 = -24
Add 48 to both sides
4x = 24
Divide both sides by 4
x = 6
A scientist is worried about a new disease being spread by mosquitoes in an area. The
scientist captures a random sample of 137 mosquitoes from the area and tests them to find out whether they carry the disease. In this sample, 22 of the mosquitoes were carrying the disease.
Using this information, the scientist uses 100 simulations of additional samples with the
same proportion of disease-carrying mosquitoes from the sample to determine that the
standard deviation for the proportion of mosquitoes carrying the disease is approximately
0.029.
1. Estimate the proportion of mosquitoes in the area that carry the disease, and provide a margin of error. Explain or show your reasoning.
2. Why did the scientist run the simulations to find additional possible proportions of
mosquitoes in the area that carry the disease?
Answer:
1. The estimate of the proportion of mosquitoes in the area that carry the disease is approximately 0.1606 or 16.06%
2. To check for accuracy of the of the value of proportion of disease carrying mosquito in the area
Step-by-step explanation:
The given parameters are;
The number of mosquitoes in the sample = 137
The number of mosquitoes that carry the disease = 22
1. The estimate of the proportion of mosquitoes in the area that carry the disease = (Number of mosquitoes with the disease)/(The number of mosquitoes in the sample)
The estimate of the proportion of mosquitoes in the area that carry the disease = 22/137 ≈ 0.1606 or 16.06%
2. The reason the scientist run the simulations to find additional possible proportions of mosquitoes in the area that carry the disease is to check for variability and accuracy of the proportion of disease carrying mosquito in the area.
1. The proportion of mosquitoes in the region that carry the illness is estimated to be 16.06%.
2. To ensure that the proportion of disease-carrying mosquitos in the region is accurate.
What is the difference between a ratio and a proportion?A ratio is an ordered pair of integers a and b expressed as a/b, with b never equaling 0. A percentage is a mathematical expression in which two ratios are specified to be equal.
Given data;
There were 137 mosquitos in the sample,[tex]\rm N_s[/tex]
The number of disease-carrying mosquitos is,[tex]\rm N_m[/tex]=22
The estimated proportion of disease-carrying mosquitos in the region is found as;
[tex]\rm D_m=\frac{N_m}{N_s} \\\\ \rm D_m=\frac{22}{137} \\\\ D_m=16.06 \ %[/tex]
2. The scientists used simulations to determine alternative probable proportions of disease-carrying mosquitos in the region in order to check for variability and accuracy in the proportion of disease-carrying mosquitos in the area.
Hence,the proportion of mosquitoes in the region that carry the illness is estimated to be 16.06%.
To learn more about the ratio, refer to the link;
https://brainly.com/question/14335762
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A phone company offers to monthly plans. Plan a cost $23 plus an additional $.08 for each minute of calls. Plan B cost $19 an additional $.12 for each minute of calls.
Answer:
The indifference point is 100 minutes.
Step-by-step explanation:
Giving the following information:
Plan a cost $23 plus an additional $.08 for each minute of calls.
Plan B cost $19 an additional $.12 for each minute of calls.
First, we need to establish the total cost formula for each plan:
Plan A= 23 + 0.08*x
Plan B= 19 + 0.12*x
x= number of minutes
Now, to calculate the indifference point, we equal both formulas and isolate x:
23 + 0.08x = 19 + 0.12x
4 = 0.04x
100= x
The indifference point is 100 minutes.
Prove:
Plan A= 23 + 0.08*100= $31
Plan B= 19 + 0.12*100= $31
how do you solve 4devided by
12 step by step long division
Answer:
3
Step-by-step explanation:
4 x 3 = 12
4 ÷ 12 = 3
its like multiplication just changing the way you solve it
Answer:
.33
Step-by-step explanation:
-12=p-7
Please help me
1+1=???? PLEASE HELP ILL MARK BRAINLIEST
Answer:
The answer to your extremely difficult question is 2.
Step-by-step explanation:
I hope this helps!!!! Please Mark me Brainliest!!!
Answer:
UMMMMM THIS IS HARD WAIT THIS TAKES ALOT OF THINKING
ITS 11
Step-by-step explanation:
U putt 2 ones together to get 11
big brain
pls help with this problem.
Answer:
23 is the answer
Step-by-step explanation:
i holed this helped
Answer : -12
a = 4x
plug in the numbers for a and x
3 - 4(-5)
3-15
-12
Hope this helps!!!
Describe and correct the error a student made when graphing the linear equation y=−
3
4x−6.
Answer:
In step 1 the y-intercept should be plotted at (0,-6)
Step-by-step explanation:
Remember that to find the Y intercept in any linear equation you need to use 0 as your X value, this means taking the formula in the y=mx+b form and replacing X with a 0.
Since the formula is y = -3/4x -6
We just insert a 0 insted of the "x"
y = -3/4(0) -6
y=0-6
y=6
So the y-intercept sould be placed in (0,-6)
That's what he did wrong when graphing the equation.
Step-by-step explanation:
https://brainly.com/question/18374630
I 3) A store is holding a promotion. Every fourth customer receives a free key chain and every sixth customer receives a free magnet. Which customer will be the first to receive both a key chain and a magnet?
Answer:
The 12th Customer
Step-by-step explanation:
The LCM of 4 and 6 is 12, as 4x3=12 and 6x2=12
What is the absolute value of -8? Use the number line to help answer the question.
-16
-8
8
16
Please help..
Give a example of force applied to an object that dies not change the objects's velocity.
Answer:
friction
Step-by-step explanation:
Consider an object that's not moving, like a chair at rest on the floor. There are two forces acting on it:
• its own weight, pulling it downward
• the normal force, i.e. the floor pushing upward on the chair.
Both of these forces are non-vanishing, but the net force is 0, so the chair remains at rest and its velocity stays at 0.
There are 4 birds and 6 snakes. What is the ratio of birds to snakes?
Answer:
4/6
Step-by-step explanation:
it says birds first so the bird number goes first
The ratio of birds to snakes is 2:3 if there are 4 birds and 6 snakes the answer is 2:3.
What is the ratio?It is described as the comparison of two quantities to determine how many times one obtains the other. The proportion can be expressed as a fraction or as a sign: between two integers.
We have:
There are 4 birds and 6 snakes.
Number of birds = 4
Number of snakes = 6
The ratio = birds: snakes
= 4: 6
On simplifying:
= 2:3
Thus, the ratio of birds to snakes is 2:3 if there are 4 birds and 6 snakes the answer is 2:3.
Learn more about the ratio here:
brainly.com/question/13419413
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What is an advantage of portrait orientation for portrait photography (photos of people)?
The composition shows more context.
The composition places attention on the foreground.
The composition minimizes the background.
All of the above
Answer:
all of the above
Step-by-step explanation:
The point of portrait orientation is to make it so the picture focuses on the person. In order to do this you need to minimize the background, place attention on the foreground, and show more context
Answer:
all of the above
Step-by-step explanation:
Heres a graph of a linear function. Write the equation that describes that function.
Answer:
Y=[tex]\frac{1}{3}[/tex]X-4
Step-by-step explanation:
Using the slope-intercept equation, a line is given as y=mx+b, where m represents the slope and b represents the y-intercept. From this graph, we can see that the slope is 1/3 and this line meets the y-axis at -4.
Thus, using that information, we substitute this into the equation to get
y= (1/3)x - 4
A like with a positive slope is parallel to one of the lines shown. What is its slope? Use the graph shown below. The slope is:
Answer:
The first line (blue) has a slope of 2/3x The slope of the second line is decreasing and hence has a slope of -3xRate positively and give brainlist1. 192 students in 4 buses
in each bus
Answer:
48 students on each bus
Step-by-step explanation:
Divide 192/4
ez
NEED HELP PLEASE 4 QUESTIONS!! PRECALC PLEASE PLEASE
Step-by-step explanation:
Domain of the function (-8, positive infinity)
All of the graphs are correct.
A = 2, B = (2, 1)
The vertical asymptote is x = 3.
Helllllllllllllllllpppppppppppppppppp
Answer:
Help with what?
Step-by-step explanation:
-5x²y²z + 7xy - x²y²z - 5xy
Answer:
-5x²y²z + 7xy - x²y²z - 5xy
Step-by-step explanation:
I WILL GIVE YOU BRAINLY PLSS
2.2x – 3.408 ≥ 29.504
A. x ≤ 12
B. x ≥ 12
C. x ≥ 14.96
D. x ≤ 14.96
PLSS SHOW YOUR WORK PLSS
Answer:
d
Step-by-step explanation:
A pair of fair dice is thrown.what is the probability of obtaining a sum of
A) At least 8
Answer:
[tex]p(e) = \frac{5}{36} [/tex]
Step-by-step explanation:
A dice contains numbers from 1 to 6.
Number whose sum is 8
2 and 6
3 and 5
4 and 4
5 and 3
2 and 6
When two dice is thrown, There are 36 possibilities {6(from the first dice) × 6(from the second dice)}.
Probability of obtaining a sum of 8 is 5/36.
An average American child aged 0-2 years old has about 915 minutes of screen time in 5 days. 6 times the difference between a child aged 0-2 years (915) and a child aged 3-5 years (X) is the same as the sum of 100 and a child aged 3-5 years (X). How much screen time does an average child (x) have?
Answer:
For children ages 2 to 5, limit screen time to one hour a day of high-quality programming. As your child grows, a one-size-fits-all approach doesn't work as well. You'll need to decide how much media to let your child use each day and what's appropriate.
Step-by-step explanation:
For kids aged 2 to 5, screen time should be limited to 1 hour per day, and parents should watch the programs with their child. Also, parents should have times when screens are turned off, and bedrooms should be media-free.
What is the slope of the line that contains the two ordered pairs (1, 3) and (2, 5)?
A singer and a producer each wrote songs for an upcoming album. The singer wrote 6 fewer than twice the number of songs that the producer wrote. They wrote a total of 54 songs. How many songs did the singer and producer wrote?
Answer:
The producer wrote 20 songs
The Singer wrote 34 songs
Step-by-step explanation:
Let
Number of songs the producer wrote = x
Number of songs the singer wrote = 2x - 6
Total songs written by singer and the producer = 54
54 = x + (2x - 6)
54 = x + 2x - 6
54 + 6 = 3x
60 = 3x
Divide both sides by 3
x = 60/3
= 20
x = 20 songs
Number of songs the producer wrote = x = 20 songs
Number of songs the singer wrote = 2x - 6
= 2(20) - 6
= 40 - 6
= 34 songs
The producer wrote 20 songs
The Singer wrote 34 songs
2.) Which of the following is a solution to x < 2?
a. -9
b. -6
c. 4
d. 2
Answer:
a.) -9
Step-by-step explanation:
Because any negative number is less than a positive number, and if you chose 2 they would be equal. and -9 is more than -6 so -9.
This one is for question #7
Answer:
B
Step-by-step explanation:
Answer:
b.) 350 = 0.25m + 300
Step-by-step explanation:
His earnings are a fixed amount, $300, and a variable amount that depends on the number of miles.
The variable amount depends on the number of miles he drives.
For 1 mile, he earns $0.25
For 2 miles, he earns $0.25 * 2
For m miles, he earns $0.25 * m
The total amount he earns is the fixed amount plus the variable amount
300 + 0.25m or 0.25m + 300
He earned $350, so we get the equation
350 = 0.25m + 300
Answer: b.) 350 = 0.25m + 300
please help me with this
Giving Brainliest/Correct Answer/MATH
find the quotient of 3/4 and 5/6 in its simplest form
Answer:
= 1 R 2
= 1 2/3
Step-by-step explanation:
The Pine Apple Store found that 18% of their weekly customers would purchase a new R-phone before leaving the store. If this was equivalent to 63 customers, how many total people entered the store last week?
Answer:
350 customers
Step-by-step explanation:
Since this is a ratio question and we only have variable that we need to solve (total people that entered last week), Then we can use the Rule of Three to solve this problem. We do this by multiplying the diagonal values of the following model and dividing by the third value in order to find the variable, like so...
18% of customers <====> 63 customers
100% of customers <====> x customers
(100 * 63) / 18 = x
6,300 / 18 = x
350 = x
Finally, we can see that a total of 350 customers entered the store last week.