Answer:
3x+5y=10 hope this helped !!
PBS News Hour reported in 2014 that 39.4% of Americans between the ages of 25 and 64 have at least a two-year college degree.† Assume that 55 Americans between the ages of 25 and 64 are selected randomly.
(a) What is the expected number of people with at least a two-year college-degree?
(b)What are the variance and standard deviation for the number of people with at least a two-year college degree? (Round your answers to four decimal places.)
Answer:
Mean = 22
Variance = 13.1320
Standard Deviation = 3.6238
Step-by-step explanation:
From the question, we can deduce that
n = 55 (sample)
p = 39.4% (proportion of those within the given range)
Solving (a): Expected Value, E(x)
This is calculated using the following formula.
E(x) = np
Substitute values for n and p
E(x) = 55 * 39.4%
E(x) = 55 * 0.394
E(x) = 21.67
E(x) = 22 ---- Approximated
Hence, the expected number of people is 22
Solving (b): Variance (σ²) and Standard Deviation (σ)
σ² is calculated as thus:
σ² = np(1 - p)
σ² = 55 * 39.4% * (1 - 39.4%)
σ² = 55 * 0.394 * (1 - 0.394)
σ² = 55 * 0.394 * 0.606
σ² = 13.13202
σ² = 13.1320 ---- Approximated
σ is calculated as follows:
σ = √σ²
Substitute value for σ²
σ = √13.13
σ = 3.6238 ----- Approximated
Which system of linear inequalities has the point (2 ,3 ) in its solution set?
Answer:
Step-by-step explanation:
Given linear inequalities of the point (2,3)
So.
(X-2)(X-3)=0
x^2-2x-3x+6=0
x^2-5x+6=0
It's solutions is x^2-5x+6.
An airplane travels 550 miles from North Carolina to Tennessee in 90 minutes. At this rate, how many minutes will it take the airplane to travel 6,600 miles?
Answer:
It will take 1,080 min or 18 hours
Step-by-step explanation:
Here is why, since 6600 miles is 12 times farther than 550 miles you'd multiply the time it took to go 550 miles by 12 too
Emile paid $3.96 for 4 songs.
What is the unit rate and what does it mean?
Enter your answers in the boxes.
Answer:
$0.99
Unit rate is cost for 1 individual (song)
Step-by-step explanation:
$3.96/4
0.99
99 cents
If f(x) = 2x?- , what is f(- 6) ?
Answer:
Step-by-step explanation:
f(-6)= 2(-6)= -12
Answer:
Step-by-step explanation:
2x=2(-6)= -12
8 ÷ 10 =
R
wright the number and the remainder
Answer: 0.8
Step-by-step explanation:
Add a decimal point, and then add a zero to 8. Divide 8.0 ÷ 10. Your answer is 0.8 because 0.8 goes into 8 10 times. There is no remainder.
Hope it helps
lovelymoonlight
PLSSS HELP WILL MARK BRANLIEST!!
Which of the following expressions represents the area of the triangle above?
Select one:
A. ax2
B. x3
C. 2x3
D. 2a2x
Answer:
A
Step-by-step explanation:
the final answer after multiplying them all is 2ax^2, but since its a triangle you multiply that by 1/2 to get ax^2
Wear a mask when spraying insecticides. right or not
Answer:
right. because if the insecticides gets in your mouth, it will infiltrate your lungs and you will suffocate.
Step-by-step explanation:
Please help I’ll mark brainliest, also tell me why you got that answer please
Answer:
D
Step-by-step explanation:
I did the math on paper and I got d
whats 2+2 super ez giving brainliest to correct 1
Answer:
4
Step-by-step explanation:
...........................
What value should go in the empty boxes to complete the calculation for finding the product of 0.61 x 0.45? Both numbers are the same, however, only input the number one time in your answer.
Answer:
the empty boxes would both be 4
but it says only put the number one time in answer
so it would be 4
Step-by-step explanation:
need some help please
Answer:
Dan
Step-by-step explanation:
To figure out who ate the most, you can convert each fraction to decimal form. Whichever value is the largest belongs to the person who ate the most of a Snickers.
6/7 = 0.86
3/4 = 0.75
0.86 is bigger than 0.75, which means that Dan ate more of a Snickers.
Which algebraic expression represents this phrase? the product of 40 and the distance to the finish line A. 40•d B.
[tex] \frac{40}{d} [/tex]
C. 40 - d D. 40 + d
Answer:
A 40•d
Step-by-step explanation:
The product of 40 and the distance (d)
40•d
B is division
C is subtraction
D is addition
The product of two numbers is multiplication, so the answer must be A
Triangle ABC is a scaled copy of triangle DEF. Side AB measures 12 cm and is the longest side of ABC. Side DE measures 8 cm and is the longest side of DEF.
a)Triangle ABC is a scaled copy of triangle DEF with what scale factor?
b)Triangle DEF is a scaled copy of triangle ABC with what scale factor?
Answer:
a) 3/2 or 1.5
b) 2/3 or ≈.66
Step-by-step explanation:
AB corresponds to DE because they are both the longest sides of their respective triangles.
a) The scale factor would be what you would multiply 8 by to get 12. 12/8 is 3/2 or 1.5
b) The scale factor would be what you multiply 12 by to get 8. 8/12 is 2/3 or ≈.66
Lines x and y are parallel write an equation that represents the relationship between b and e. Explain how you know the equation is always true
Answer:
b+e= 180 degrees
Step-by-step explanation:
Because they are perpindicular
Answer:
Step-by-step explanation:
Find the volume of the cylinder 9 cm and 23 cm 
A package of 6 pairs of insulated gloves cost 32.94. What is the unit price of the pairs of socks
Answer:
$5.49 each
Step-by-step explanation:
32.94 divided by 6
Find x and y. Give reasons to justify your solution. I will give brainliest PLS HELPPPPPPPP
Step-by-step explanation:
eog=90
27+3y=90
3y=63
y=21
aob=180
x+90+3x+18=180
x+3x+108=180
4x=180-108
4x=72
x=18
good luck dude
Answer: y= 21
x=18
Step-by-step explanation:
What are the solutions of 8x2 = 6 + 22x? Check all of the boxes that apply.
x = -3
x =
x = 3
x = 6
Answer:
x = 3 x = ‐1/4
Step-by-step explanation:
Was right on the quiz
Answer:
x = 3 x = ‐1/4
Step-by-step explanation:
the first one is also right!!
I need step by step help how to work this out
Answer:
31.73
Step-by-step explanation:
[tex]3x^{2} +5y[/tex]
x = 2.1
y = 3.7
Substitute;
[tex]3(2.1)^{2} +5(3.7)=3(4.41)+18.5=13.23+18.5=31.73[/tex]
To divide 2/3 divided by 5 first shade the diagram to represent the dividend.
Answer:
heb he hrhrjejenennsksksskskkskskjsjjee
The graph of f(x) = x2 has been shifted into the form f(x) = (x − h)2 + k:
Answer:
3
Step-by-step explanation:
H is a horizontal shift to the right. The graph went over 2, so h=2. From there the graph went up 3 (vertical shift) so K=3
How much would 7 bottles of water cost
Answer:
$5.25
Step-by-step explanation:
Move vertices A, B, and C to create a triangle of your choice. Record the measures of the interior angles α, β, and γ for three different triangles. Then find the sum of the angle measures for each triangle.
Answer:
α β γ Sum of Interior Angles
75.96° 50.91 53.13° 180°
45° 126.87° 8.13° 180°
26.57° 135° 18.43° 180°
Step-by-step explanation: cause I did it
Answer:
S.A for Questions 1 and 2 for Edmentum and Plato
Like and Rate
Write the slope-intercept form of the equation of each line. Identify the slopes y-intercept
Answer:
It is
X -6 -4 0 4 6
Y 8 6 2 -2 -4
point y is between the points X and Z. if XY =3x- 4 , YZ = 2x +3, and XZ =24
Answer:
The numerical value of XY is 11
The numerical value of YZ is 13
Step-by-step explanation:
Given that
XY =3x- 4 , YZ = 2x +3, and XZ =24
As Y is between the points X and Z so the sum of length of XY and YZ will be equal to the length of XZ. Putting this in mathematical form
[tex]XY+YZ = XZ[/tex]
Putting the values
[tex](3x-4) + (2x+3) = 24\\3x-4+2x+3 = 24\\5x-1 = 24\\5x = 24+1 \\\frac{5x}{5} = \frac{25}{5}\\x = 5[/tex]
Now
[tex]XY = 3x-4 = 3(5)-4 = 15-4 = 11[/tex]
[tex]YZ = 2x+3 = 2(5)+3 = 10+3 = 13[/tex]
Hence,
The numerical value of XY is 11
The numerical value of YZ is 13
Just answer number 1
M<7=30 ,m<2 ?
Answer:
Step-by-step explanation:
1). ∠7 ≅ ∠ 2 (alternate exterior)
m∠7 = m∠2 = 30°
2). ∠4 and ∠1 are supplementary angles
m∠1 = 180° - 72° = 108°
Please answer this correctly without making mistakes
Answer:
The 2-yard pièce of cotton cloth for $13.26
Step-by-step explanation:
2 yards is 6 feet then it would be $2.21 per foot.
The 17 foot piece would cost $3.29 per foot.
To answer this question, you need to determine which one has a lower price per unit. In this scenario, you must divide the price of the cloths by their length in feet.
For the 2-yard piece of cotton cloth, first convert the length to feet. There are three feet in a yard, so the cloth is 6 feet. Then divide:
13.26/6=2.21
For the 17-foot piece of cotton cloth, simply divide:
55.93/17=3.29
The 2-yard piece of cotton cloth for $13.26 is the better buy because it has a lower unit price.
Hope this helps!!
A baker bought a total of 12 pounds of apples and bananas for $10.20.
The system of equations {a+b=120.75a+1.05b=10.20 models this situation, where a is the number of pounds of apples, and b is the number of pounds of bananas.
How many pounds of each did the baker buy?
In the figure below, m angle a=3x+5;m angle b=5x-18 , and m angle c=7x-2 .
Answer:
∠a=44,∠b=47, ∠c=89
Step-by-step explanation:
we can note that
∠a+∠b+∠c=180
hence,
3x+5+5x-18+7x-2=180
therefore,
3x+5x+7x+5-18-2=180
15x-15=180
15x=180+15
15x=195
x=[tex]\frac{195}{15}[/tex]
then, x=13.
with this values we can find all the angles:
∠a=3x+5 ⇒∠a=3(13)+5⇒∠a=39+5⇒∠a=44
∠b=5x-18⇒∠b=5(13)-18⇒∠b=65-18⇒∠b=47
∠c=7x-2⇒∠c=7(13)-2⇒91-2⇒∠c=89
We can corroborate these result by adding them.
∠a+∠b+∠c=
44+47+89=180
Thats right !!
