Step-by-step explanation:
first method
add 5 from both side
2x -5 +5 = 7+5
2x= 12
X = 2
12
divide 2 from both side
2. 12
2. 2
X = 6
second method
2x-5=7
2x = 5+7
2x=12
X=2/12
X =6
:.
I need help with math
Answer:
6:3
Step-by-step explanation:
The points (11, 13) and (7, 13) fall on a particular line. What is its equation in slope-intercept form?
Answer:
slope -intercept form y=mx+c
The equation of the straight line
y = 0x +13
Step-by-step explanation:
Step(i):-
Given that the points
(11 ,13) and (7,13)
The slope of the line
[tex]m = \frac{y_{2}-y_{1} }{x_{2} -x_{1} } = \frac{13-13}{7-11} = \frac{0}{-4} =0[/tex]
Step(ii):-
Equation of the straight line passing through the point (11,13) and slope m=0
y - y₁ = m( x-x₁)
y - 13 =0(x-11)
y-13 =0
y =13
slope -intercept form y=mx+c
y = 0x +13
given a population mean of 27.1 with a standard deviation of 8.4 and a sample size of 10, answer these questions.
part A: what is the standard deviation of the sampling distribution of x hat? show your work.
PartB: what does the sample size need to be if you want the standard deviation of the sampling distribution of x hat to be 2.8? show your work.
Answer:
a) 2.66
b) 9
Step-by-step explanation:
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].
part A: what is the standard deviation of the sampling distribution of x hat? show your work.
We have that [tex]\sigma = 8.4, n = 10[/tex]. So
[tex]s = \frac{\sigma}{\sqrt{n}} = \frac{8.4}{\sqrt{10}} = 2.66[/tex]
PartB: what does the sample size need to be if you want the standard deviation of the sampling distribution of x hat to be 2.8?
This is n when [tex]s = 2.8[/tex]. So
[tex]s = \frac{\sigma}{\sqrt{n}}[/tex]
[tex]2.8 = \frac{8.4}{\sqrt{n}}[/tex]
[tex]2.8\sqrt{n} = 8.4[/tex]
[tex]\sqrt{n} = \frac{8.4}{2.8}[/tex]
[tex]\sqrt{n} = 3[/tex]
[tex](\sqrt{n})^2 = 3^2[/tex]
[tex]n = 9[/tex]
Which two expressions are equivalent?
Answer:
option 3
Step-by-step explanation:
12 - (y*2) = 12 - (2*y) Commutative property
2*y = y*2
X = 5(84/100) + 4(10/100) +3(4/100) + 2(1/100) + 1(1/10)
the correct answer is,
[tex]x = \frac{121}{25} [/tex]
if you want me to solve without the parentheses then the answer would be,
[tex]x = \frac{1609}{100} [/tex]
Answer:
What they said
Step-by-step explanation:
After the movie 99 out of 130 people surveyed.
What is the experimental probability that the next person surveyed will say he or she liked the movie?
Answer:
19 percent
Step-by-step explanation:
yw
Using either substitution or elimination method, solve the system of equations that consists of 8x+y= -16 and -3x+y=-5 Your solution will be a coordinate of integers.
Answer:
x= -1
y= -8
Step-by-step explanation:
Solve for y in 8x + y = -16
y = -16 - 8x
Substitute y = -16 - 8x into -3x + y = -5
-11x - 16 = -5
Solve for x in -11x - 16 = -5
x = -1
Substitute x = -1 into y = -16 - 8x
y = -8
Therefore,
x= -1
y= -8
Answer:
(-1, -8)
Step-by-step explanation:
SUBSTITUTION METHOD:
8x + y = -16-3x + y = -5Solve for y in the first equation by subtracting 8x from both sides.
y = -16 - 8xSubstitute this value for y into the second equation.
-3x + (-16 - 8x) = -5Remove the parentheses and simplify.
-3x - 16 - 8x = -5Combine like terms.
-11x - 16 = -5Add 16 both sides of the equation.
-11x = 11Divide both sides of the equation by -11.
x = -1Substitute this value for x into either equation (I'm using the first equation).
8(-1) + y = -16Multiply and simplify.
-8 + y = -16Add 8 to both sides of the equation.
y = -8ELIMINATION METHOD:
8x + y = -16-3x + y = -5Subtract the second equation from the first equation to "cancel" the y-variable.
11x = -11Divide both sides of the equation by 11.
x = -1Substitute this value for x into either equation (I'm using the second equation).
-3(-1) + y = -5Multiply and simplify.
3 + y = -5Subtract 3 from both sides of the equation.
y = -8The solution to this system of equations is (-1, -8).
16
20
25
16
20
50
5. Eli's school collected 140 canned foods last month, which represents 25% of their goal.
Part A: What is the school's goal for the number of canned foods they hope to collect?
anned
Answer:
560
Step-by-step explanation:
I'm kinda confused on whats being asked i went with just question number 5
Which equation represents a line which is perpendicular to the line x – 2y = -14?
Answer:
any equation that have the slope of -2
A line which is perpendicular to the line x – 2y = -14 will have a slope of -2
What is a slope?The slope of a line is a measure of its steepness.
Given an equation of a line x – 2y = -14
We know that, the slope of a line perpendicular to another line will have a slope of its negative reciprocal.
Therefore, slope of the line perpendicular to the line x – 2y = -14 will be -2
Hence, equation of the line perpendicular to the line x – 2y = -14 will have a slope of -2
For more references on slope, click;
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#SPJ2
Given that €1 = 0.72
How much is €410 in £?
Answer:
295.20
Step-by-step explanation:
410*0.72
Answer:
295.2
Step-by-step explanation:
60 in scientific notation
Answer:
I think the answer would be 6.0x10¹
If 60 was in scientific notation it would look like 6.0 because there is only one zero and we would need to move the decimal one place to the right. So we multiply 10¹ so we can move that decimal to the right to make 60.
On a cruise ship there are two options for an Internet connection. The first option is a fee of $5 plus an additional $0.25 per minute. The second option cost $50 for an unlimited number of minutes. For how many minutes, m, is the first option cheaper than the second option? BRAINLIEST!!!
Answer:
m=180
Step-by-step explanation:
5+0.25m=50
-5. -5
0.25m=45
divide both terms by 0.25
m=180
with the first option you can get 180minuts or 3hours for the equivalent of the $50 option.
hope this helps :)
Which of the linear equations below is derived from the
following table of values?
HELP ME
Answer:
A. y=x+4
Step-by-step explanation:
I used Desmos to graph all the information and the black line (which is A) goes through all the points. See picture
Brooke bought 6 bags of powdered sugar. She got a total of 4 2/3 cups of sugar. How many cups of sugar were in each bag
Answer:
6.5 bags of sugar in each bag
Step-by-step explanation:
Find the domain and range of the function graphed below.
5+
3
2
1
1.
-5 -4 -3 -2 -1
41
+
1 2 3 4 5
-2
-3
-4
-5+
O
Which inequality is represented by the number line diagram shown below?
Answer:
I think the second one
Step-by-step explanation:
Answer:
the first
one
Step-by-step explanation:
Please help me
-(8x)^2
-x/4=3
-8x-5=35
-4(z+7)=36
write 47% as a decimal
Answer:
0.47
Step-by-step explanation:
47% is the same as 0.47.
Hope it helps!
what if u round 0.5 to the nearset hundredth
Answer:
0.50 (still the same)
Step-by-step explanation:
The first platform of the Eiffel Tower is 2,280 inches above the ground. The second platform is 376 feet above the ground. How many yards separate the first platform from the second platform?
Answer:
62.0496 yards separate the first platform from the second platform
Step-by-step explanation:
We have to make the conversion of both units to yards.
Each feet has 12 inches.
Each inch is 0.0278 yards.
The first platform of the Eiffel Tower is 2,280 inches above the ground.
So
2280*0.0278 = 63.384 yards above the ground.
The second platform is 376 feet above the ground.
So
376*12*0.0278 = 125.4336 yards above the ground
How many yards separate the first platform from the second platform?
125.4336 - 63.384 = 62.0496
62.0496 yards separate the first platform from the second platform
Determine the degree of the polynomial
u have to divide then pray
ANSWER TO NUMBER 3 FIRST PERSON GETS BRAINLIEST!!
lan often takes his dog to the park. He estimates that 30% of the other dogs
he sees are retrievers, 20% are terriers, and 20% are German shepherds. He
designs a simulation.
Let 0, 1, and 2 represent retrievers.
Let 3 and 4 represent terriers.
Let 5 and 6 represent German shepherds.
Let 7, 8, and 9 represent other dogs.
The table shows the simulation results.
Answer:
0.60 if it is shepherd!
Step-by-step explanation:
Consider function fand function g.
() = In
g(x) = -5 In
How does the graph of function g compare with the graph of function ?
Unlike the graph of function f, the graph of function ghas a y-intercept.
The graph of function g is the graph of function fvertically stretched by a factor of 5.
Unlike the graph of function f, the graph of function g decreases as x increases.
The graphs of both functions have a vertical asymptote of r = 0.
Unlike the graph of function f, the graph of function g has a domain of {+1 -5 < x < 0}
Reset
Next
Answer:
I believe it is the first third and fourth options, I am not entirely sure for I mostly guessed on them, but they make the most sense when looking at the graph.
Step-by-step explanation:
It can be deduced that the graph of function f and g compare as:
Unlike the graph of function f, the graph of function g decreases as x increases.The graph of both functions have a vertical asymptote of x = 0.What is a function?A function in mathematics simply means the relation between a set of inputs and a set of permissible outputs.
In this case, the graph of both functions have a vertical asymptote of x = 0. This is because the divisor equals to zero for a value of x.
Learn more about graphs on:
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f(x) = x^5 +x^3+2x^2-12x +8
Answer:
35 is the answer to this problem
Step-by-step explanation:
[tex] \sqrt{81 \times 8} [/tex]
Answer:
Step-by-step explanation:
81 = 9 * 9 = 3 * 3 * 3 *3
8 = 2 * 2 * 2 *2
[tex]\sqrt{81 * 8 } = \sqrt{3*3*3*3*2*2*2}\\\\=3 * 3 * 2 \sqrt{2}\\\\= 18\sqrt{2}[/tex]
Can y’all please help me!
Answer:
B)
Step-by-step explanation:
Answer: its B.... YWWW!!!
Step-by-step explanation:
Which of the following coordinates is in the solution set of this system?
A. (0,0)
B. (-5,3)
C. (8,-8)
D. (1,-4)
E. (2,-5)
Answer:
B.
Step-by-step explanation:
Answer:
b ceguro
pa heart din plss
1. To determine the most common injury cared for in an emergency room, a reporter goes to the same hospital every
afternoon for one month during the summer and observes people entering the emergency room. She concludes that
second degree sunburn is the most common injury.
Unbiased and Biased Samples
Answer:
Unbiased
Step-by-step explanation:
Your answer would be unbiased because the reporter is going in the same hospital every afternoon for one month which means that the reporter is using the Systematic sample and systematic is an unbiased sample
Serena’s average speed during her training run was 8 kilometers per hour over the 2 hours that she ran. What was the total distance that she ran?
Use the formula d = rt, where d represents the distance, r represents the rate, and t represents the time
Answer:
16 kilometres
Step-by-step explanation:
d is 2 hours and because it's times 2 RT would be 16
Answer:
i, .... dont have a clue. :(
Step-by-step explanation:
sorry