Answer:
the answer is 8
Step-by-step explanation:
a2+3b÷c-2d
3×2+3×8÷2-10
6+24÷2-10
6+12-10
18-10
=8
A researcher is studying the relationship between stress and diet among college students. The researcher recruits students by sending out an e-mail blast, and then includes in the sample the first 100 male and 100 female students who volunteer to participate. What type of sampling did the researcher use
Using sampling concepts, it is found that convenient sampling was used by the researcher to find the volunteers to participate.
How are samples classified?Samples may be classified as:
Convenient: Drawn from a conveniently available pool.Random: All the options into a hat and drawn some of them.Systematic: Every kth element is taken. Cluster: Divides population into groups, called clusters, and each element in the cluster is surveyed.Stratified: Also divides the population into groups. Then, a equal proportion of each group is surveyed.In this problem, the first 100 male and first 100 female students sampled are the ones who volunteer to participate, and volunteering is associated with convenient sampling.
More can be learned about sampling concepts at https://brainly.com/question/25122507
find the area sector of AOB
[tex]\textit{area of a sector of a circle}\\\\ A=\cfrac{\theta \pi r^2}{360}~~ \begin{cases} r=radius\\ \theta =\stackrel{degrees}{angle}\\[-0.5em] \hrulefill\\ r=12\\ \theta = 70 \end{cases}\implies \begin{array}{llll} A=\cfrac{(70)\pi (12)^2}{360}\implies A=28\pi \\\\\\ A\approx 87.96~cm^2 \end{array}[/tex]
IRIS BULBS
First half-dozen
Second half-dozen
Each additional bulb
$5 per bulb
$4 per bulb
$3 per bulb
Which of the following calculations represents the
cost of 2 dozen iris bulbs?
A. 24 x $3
B. $5 + (2 x $4) + (12 x $3)
C. (6 x $5) + (6 x $4) + (12 $3)
D. (12 x $5) + (12 $4)
E.
(3 x 85) + (3 x sa) + (12 x $3)
+
$3
The calculation that represents the cost of 2 dozen iris bulbs is ($5 * 6) + ($4 * 6) + ($3 * 12)
What is an equation?
An equation is an expression that shows the relationship between two or more variables and numbers.
The cost of 2 dozens of iris bulbs is given by the equation:
Cost = ($5 * 6) + ($4 * 6) + ($3 * 12)
The calculation that represents the cost of 2 dozen iris bulbs is ($5 * 6) + ($4 * 6) + ($3 * 12)
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50 PTS I WILL MARK BRAINLIEST PLS HELP! A book store manager took several random surveys of customers to determine which book genre they purchased most frequently. This table shows the average of each survey.
Based on the data shown in the table, which conclusions can be made about the frequency that customers purchase a genre?
Select each correct answer.
On average, 1 out of 6 customers purchase fantasy books most frequently.
On average, 24% of the customers purchase autobiographies most frequently.
On average, 22% of the customers purchase romance books most frequently.
On average, 2 out of 10 customers, purchase health and wellness books most frequently.
Book Genre Average of Surveys
Autobiographies 24
Mystery 11
Romance 22
Health and Wellness 18
Fantasy 15
Part A
The distance that Eric can travel by driving to work can be represented by a linear equation because he sets his cruise control and is moving at a constant rate. He drives at a rate of 75 mph on the interstate for a total of 1.5 hours.
What is the linear equation that can be used to find the distance that Eric travels each day? In the equations d = distance traveled, r = rate and t = time taken.
A. d = rt
B. d = t/r
C. d = r/t
D. d = r + t
E. d = r/75
Part B
What is the total distance that Eric travels each day?
A. 37.5 miles
B. 75 miles
C. 112.5 miles
D. 150 miles
E. 187.5 miles
WILL GIVE BRAINLIEST AND 40 POINTS
Answer:
Step-by-step explanation:
There's a saying to this kind of equation: Rate + Time = Distance and B best fits the saying, so B must be right (Don't quote me on that, it may be wrong)
the linear equation that can be used to find the distance that Eric travels each day is A. d = rt & the total distance that Eric travels each day is C. 112.5 miles.
What is speed?Speed is measured as distance moved over time.
here, given that,
He drives at a rate of 75 mph on the interstate for a total of 1.5 hours.
so, the linear equation that can be used to find the distance that Eric travels each day is A. d = rt
i.e. d= 75*1.5
=112.5
& the total distance that Eric travels each day is C. 112.5 miles.
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Please help !
∆ABC is similar to ∆DEF. The measure of AB = 6, the measure of DE = 18, the measure of BC = 12, and the measure of DF = 15.
Find the measures of AC and EF.
AC =
_______________
EF =
[tex] \frac{ab}{de} = \frac{bc}{ef} = \frac{ac}{df} [/tex]=k
[tex] \frac{6}{18} = \frac{12}{ef} [/tex]
[tex]ef = 36[/tex]
from this[tex] \frac{12}{36} = \frac{ac}{15} [/tex]
[tex]ac = 5[/tex]
[tex] \frac{6}{18} = \frac{12}{36} = \frac{5}{15} = \frac{1}{3} [/tex]
I hope it helps
Sophia goes to an icecream shop to get a medium ice cream that costs $4.50, Sophia only has $6.40 and toppings are $0.75 each. Write an inequality to find how many toppings Sophia can get .
Answer:
x ≤ 2
Step-by-step explanation:
4.5 = medium ice cream
0.75x = toppings, x = amount of toppings
Sophia has $6.4, so 4.5+0.75x has to be less or equal to that.
4.5 + 0.75x ≤ 6.4, solve
0.75x ≤ 1.9
x ≤ 2 8/15
BUT you cannot get half a topping or a fraction of a topping,
so, x ≤ 2 toppings.
Sophia can get 2 or less toppings.
Subtract. Write the answer as a fraction simplified to lowest terms.
41/40 - 3/8 =
Hey there!
41/40 - 3/8
= 41/40 - 3 × 5 / 8 × 5
= 41/40 - 15/40
= 41 - 15 / 40 - 0
= 26 / 40
= 26 ÷ 2 / 40 ÷ 2
= 13 / 20
Therefore, your answer is: 13/20
Good luck on your assignment & enjoy your day!
~Amphitrite1040:)
A tabletop in the shape of a trapezoid has an area of 7,367 square centimeters. Its longer base measures
127 centimeters, and the shorter base is 85 centimeters. What is the height?
The height of the tabletop is
centimeters.
Answer:
69.5 cm
Step-by-step explanation:
Area trapezoid = 1/2 (b1+b2) * h = 7367
1/2(127+85) h = 7367 h=
write the inequality from the given number line.
Answer:
[tex]3 \leqslant - 3[/tex]
The sum of two number is −16. One number is 20 less than the other. Find the numbers.
Answer:
-50 is your answer it is really easy just try to get -50
By rewriting the formula for the multiplication rules you can write a formula for finding conditional probabilities. The conditional probability of event b Occurring giving that event a has occurred is
The probability that an airplane flight departs on time is 0.91
The probability that a flight arrives on time is 0.89.
The probability that a flight departs and arrives on time is 0.84
The probability that a flight departed on time given that it arrives or
(Round to the nearest thousandth as needed
The probability that a flight departed on time given that it arrives is 0.92
Conditional ProbabilityThe conditional probability of event B occurring giving that event A has occurred is expressed as
P(B|A) = P(A and B)/P(A)
Given the following parameters
P(A and B) = The probability that a flight departs and arrives on time = 0.84
P(A) = The probability that an airplane flight departs on time = 0.91
P(B | A) = 0.84/0.91
P(B | A) = 0.92
Hence the probability that a flight departed on time given that it arrives is 0.92
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Classify Two-Dimensional Figures question 5
Answer:
Examples of 2D shapes
2D Shape Properties
Pentagon A shape with five sides and five equal angles.
Kite A quadrilateral with two pairs of sides of the same length.
Rhombus A quadrilateral with both pairs of opposite sides parallel and all sides of the same length. Unlike a square, however, its angles are not all 90˚.
Step-by-step explanation:
Sarah is designing a triangular pyramid made of all glass to go on top of a building. All of the faces of the pyramid have a height of 17 feet and a base of 20 feet.
How much glass is needed?
A.
680 sq ft
B.
340 sq ft
C.
2,040 sq ft
D.
1,360 sq ft
Answer:
Area of a triangle is 1/2 x base x height.
area of triangle = 1/2 x 20 x 17 = 170 square feet.
the image shows 4 triangles, total area = 170 x 4 = 680 square feet.
the answer is A. 680 sq. ft.
Hope this helps you!!
Please Mark me as Brainleast!!!!!!!!!!!!!
Answer: the answer is a which is 680 ft²
Step-by-step explanation: we will make 17 Times 220 divided by 2 equals 170 times by 4 equals 680 . Hope it helps you buddy .
Write an equation in slope-intercept form for the line shown.
The equation in slope-intercept form is _______ .
To write the equation in slope-intercept form
⇒ must know what is the slope-intercept form
⇒ [tex]y = mx + b[/tex]
m: the value of the slopeb: the value of the y-interceptLet's find the slope first:
⇒ must know the slope's formula
⇒ [tex]\frac{y2-y1}{x2-x1}[/tex]
(x1, y1) --> one point on the line(x2, y2) --> another point on the line that is not (x1, y1)Let's choose (0,1) and (-3,0)Now let's find the slope⇒ [tex]\frac{0-1}{-3-0}=\frac{-1}{-3} =\frac{1}{3}[/tex]
Now let's find the y-intercept
⇒ which occurs where the x-value of the coordinate is 0
⇒ that point is (0,1)
⇒ thus b = 1
Now let's set up the equation in slope-intercept form
[tex]y = \frac{1}{3} x+1[/tex] <-- Answer
Hope that helps!
Answer:
y-1/3x+1:
hope it helped
35) Use a formula to find the area of the figure.
a
15 in.
7 in.
20 in.
Answer:
c:) 150 in²
Step-by-step explanation:
It's basically and SAS triangle
SAS is Side, Angle, Side
side 15 in angle 90° and 20 in
a = 20 in
b = 25 in
c = 15 in
Angles:
A = 53.1301 °
B = 90 °
C = 36.8699 °
Other:
P = 60 in
s = 30 in
K = 150 in2
r = 5 in
R = 12.5 in
Agenda:
A = angle A
B = angle B
C = angle C
a = side a
b = side b
c = side c
P = perimeter
s = semi-perimeter
K = area
r = radius of inscribed circle
R = radius of circumscribed circle
Which statement describes the transformation of figure 2 into figure 3?
Answer:
2 reflection across the y axis
Find the volume of the specified cone. Use 3.14 for , and round your answer to the nearest whole numbe
Diameter = 3 cm, Height = 7 cm
a 44 cu, cm
b. 66 cu, cm
c. 99 cu, cm
d 16 cu, cm
Answer:
Your answer is D 16 cu, cm
Step-by-step explanation:
paid well, HELP I need someone with tangent knowledge...
[tex]tan (M) = \frac{side-opposite-angle-M}{side-adjacent-angle-M} =\frac{8\sqrt{2} }{4} =2\sqrt{2}[/tex]
Hope that helps!
ps. I attached a sheet of trigonometry identities
HELP / 100 POINTS
This shape has _______ faces.
This shape has 5 vertices.
This shape has 8 edges.
Answer:
5 faces
Step-by-step explanation:
A traingular prism has 5 faces. The square on the bottom and the four traingles that make up the sides.
hope this helps :)
Answer:
5
8
5
step by step
Love your pfp
true or false in order to find the surface area of a cube you could find the area of one face and multiply by six
Answer:
True
Step-by-step explanation:
The surface area of a cube is the total area on each side of the cube. SInce there are 6 sides of a cube, the surface area is equal to six times the area of one of the sides, because they are all the same.
HELP!
You own a square plot of land and you want to determine its surface area. You know that one side of land measures 10 longer than what the appraisers estimated, but you lost the paperwork with the information. Write an expression to represent the area of your land.
What is the area of the property if x = 12?
The area of the property is the product of its dimensions, and the expression for the area is (x + 10)²
How to determine the expression for area?The area of the land is the product of its dimensions.
Let the length and the width of the land be x.
So, the area measured by the appraisal is:
Area = x²
One side of the land is 10 more than the measured length.
So, we have:
Area = (x + 10)²
Substitute 12 for x
Area = (12 + 10)²
Evaluate
Area = 484
Hence, the area of the property is 484
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what is the reciporcal of 7/6
Answer:
6/7
Step-by-step explanation:
you juts switch the top and bottom
Brainleist please
The base of a prism are right triangles with leg lengths of 7 inches and 5 inches. the prism height is 12 inches. what is the volume of the prism?
A 105
B 203
C 210
D 420 [but we know for certain d is wrong]
Answer:
The volume formula is length x width x height. 7x5x12=420 cubic inches
Step-by-step explanation:
Using substitution, what is the solution for the system of equations below?
Hey there!
Substitute x = 2 to y = 3x - 1
=> y = 3(2) -1
=> y = 6 - 1
=> y = 5
x = 2,y = 5
need help really please somebody
Answer:
70/100 ; 3/10 ; 50/100
Step-by-step explanation:
You need to multiply numbers to make them equivalent.
1st Question:
7/10 has to multiply by 10/10 because the denominator of the other one is 100 and 10 x 10 is 100.
7 x 10 = 70
70/100 shall be your answer.
2nd Question:
This time you need to find your starting point.
A way to do this is to divide/simplify the fraction in order to make it equivalent.
You need to divide by 10 because your quotient and denominator at your starting point is 10 and 100/10 is 10.
30 divided by 10 is 3
Your Answer for this one is: 3/10
3rd Question:
Same thing as the 1st one.
Multiply by 10.
5 x 10 = 50
50/100 is your answer.
fifty million of 94 million households watched the last episode of a popular television show. What percentage of households were not watching the show?
The percentage of households that were not watching the show were 46.81%.
Step-by-step explanation:In this case, we need to find the percentage of households that don´t watch the show. First, we need to know how much households don´t watch the show, this is:
[tex]94,000,000-50,000,000=44,000,000[/tex]
So, the households that were not watching the show were 44 million.
Now we can calculate the percentage, to find a percentage we use a division and to introduce the percentage units we multiply by 100.
[tex]\frac{44,000,000}{94,000,000}[/tex] × [tex]100=46.81[/tex]The percentage of households that were not watching the show were 46.81%.
Explain why a balance of less than -$10 represents a debt greater than $10.
Answer:
tbh I'm in 6 grade-_- and it's maybe higher than 10$
NEED HELP WITH THIS QUESTION QUICK!!!
Answer:
56 degrees
90-34=56
Right-angle triangle, so the 2 angles should add to 90 to make 180 degrees
Hope this helps!
TODAY'S BRAIN TEASER
Solve it and gain 50 points plus BRAINLIEST
Solve any two questions out of three
WRONG COPIED OR SPAM WILL BE INTOLERABLE
SO SO SO NOT WASTE TIME IF YOU DON'T KNOW
GOOD LUCK
Answer:
Question 3
Find the range of the function for the domain 2 < x < 3
[tex]f(2)=(2)^2-1=3[/tex]
[tex]f(3)=(3)^2-1=8[/tex]
Therefore, the range of [tex]f(x)=x^2-1[/tex] is [tex]3 < f(x) < 8[/tex] with domain 2 < x < 3
This means that for the function to be continuous, when the domain is x=3, f(x) = 8
[tex]f(3)=2a(3)=6a[/tex]
[tex]\implies 6a=8\implies a=\dfrac43[/tex]
Similarly, when the domain is x > 3, f(x) > 8
[tex]f(3)=b(3)-4=3b-4[/tex]
[tex]\implies 3b-4 > 8 \implies b = 4[/tex]
Therefore, [tex]a=\dfrac43[/tex] and b = 4
Question 5
[tex]\textsf{let}\:u=\ln (x)[/tex]
[tex]\implies \dfrac{du}{dx}=\dfrac{1}{x}\implies dx=x\:du[/tex]
[tex]x=1\implies u=0[/tex]
[tex]x=3 \implies u=\ln 3[/tex]
[tex]\implies \displaystyle \int\limits_{1}^{3} \dfrac{\ln x \sin (\ln x)}{x} \,\:dx=\displaystyle \int\limits_{0}^{\ln 3} \dfrac{u \sin u}{x} \, \cdot x\:du=\displaystyle \int\limits_{0}^{\ln 3} (u \sin u) \, \:du[/tex]
Use integration by parts:
[tex]\displaystyle \int u\dfrac{dv}{dx} \, dx=uv- \displaystyle \int v \dfrac{du}{dx} \, dx[/tex]
[tex]\textsf{where}\:u=u\:\textsf{and}\:\dfrac{dv}{dx}=\sin u[/tex]
[tex]\implies \dfrac{du}{dx}=1\:\textsf{and}\:v=\int \sin u=-\cos u[/tex]
[tex]\implies \displaystyle \int\limits_{0}^{\ln 3} (u \sin u) \, \:du=-u \cos u- \int\limits_{0}^{\ln 3}-\cos u \,\:du[/tex]
[tex]\begin{aligned}\implies \displaystyle \int\limits_{0}^{\ln 3} (u \sin u) \, \:du & =\left[-u \cos u+ \sin u\right]_{0}^{\ln 3}\\ & =[- (\ln 3) \cos (\ln 3)+ \sin (\ln 3)]-[-0 \cos (0)+ \sin (0)]\\\\ & =[- (\ln 3) \cos (\ln 3)+ \sin (\ln 3)]-0\\\\ & = 0.3908925527...\end{aligned}[/tex]