Answer:
22
Step-by-step explanation:
Simplify the expression
I need help on these Math questions ASAP. Sorry if I come off as annoying. I don't understand these questions and I've researched everything. They've been overdue for about a week now. Sorry.
Answer:
Ok
Step-by-step explanation:
1. Members of a research team are considering three studies related to sleep and learning. The first study involves comparing the scores on a post-study test of learning from two groups of randomly chosen adults, with one group getting at least 7 hours of sleep per night for a week and the other group getting at most 6 hours
of sleep per night for a week. A second study involves asking a random sample of students at a large university to report the average number of hours of sleep they get each night and their college grade point average. A third study involves asking a random sample of high school students in a large school district whether they feel they get enough sleep to stay alert throughout the school day.
The question is incomplete. The complete question is :
Members of a research team are considering three studies related to sleep and learning. The first study involves comparing the scores on a post-study test of learning from two groups of randomly chosen adults, with one group getting at least 7 hours of sleep per night for a week and the other group getting at most 6 hours of sleep per night for a week. A second study involves asking a random sample of students at a large university to report the average number of hours of sleep they get each night and their college grade point average. A third study involves asking a random sample of high school students in a large school district whether they feel they get enough sleep to stay alert throughout the school day.
Which study appears to look for an association between two variables without actively manipulating either one. What are those variables ?
Solution :
The second study in the context is involved in asking for a random sample of the students at an university to provide a report the average hours of sleep that everybody get each night and also the grade point of their college appears for association between these two variables without actively changing either of one.
These variables are the grade point average of the students and the numbers of hours of sleep.
Let f(x) = 7x² + 19x + 21 and g(x) = 4x² + 4x + 3 . Identify the solution(s) of f(x) = g(x).
Answer:
-3 and -2
Step-by-step explanation:
7x² + 19x + 21 = 4x² + 4x + 3
combine like terms:
3x² + 15x + 18 = 0
3(x² + 5x + 6) = 0
(x + 3)(x + 2) = 0
x = -3
x = -2
What are the answers for 1-4 this is geometry.
Answer/Step-by-step explanation:
1. x*21 = 24*14 (intersecting chords theorem)
21x = 336
x = 336/21
x = 16
2. 27*x = 45² (secant-tangent rule)
27x = 2,025
x = 2,025/27
x = 75
3. (x + 5)*5 = (4 + 6)*6 (Intersecting secants theorem)
5x + 25 = (10)*6
5x + 25 = 60
5x = 60 - 25
5x = 35
x = 35/5
x = 7
4. (4x + 2)*8 = (5x + 1)*7
32x + 16 = 35x + 7
Collect like terms
32x - 35x = -16 + 7
-3x = -9
x = -9/-3
x = 3
2/5 - 1/ 3 / 4/7
A. 7/8
B. 4/14
C. -11/60
D. 8/14
Answer:
2/5 - 1/ 3 / 4/7
[tex] \frac{2}{5} - \frac{1}{3 } \times \frac{7}{4 } \\ \frac{12 \times 2 - 7 \times 5}{60} \\ \frac{ - 11}{60} [/tex]
C.-11/60 is your answer
The cost of a holiday is £2400. Rana pays a deposit followed by monthly payments, in the ratio deposit:total of the monthly payments=3:5 she makes 6 equal monthly payments. Work out her monthly payment
Answer:
Monthly installments = £250
Step-by-step explanation:
Given
Total cost of holiday = £2400
Ratio deposit : total of the monthly payments=3:5
Total deposit made = [tex]\frac{3}{3+5} * 2400 = 900[/tex]
Total amount of the monthly payments = 2400 -900 = 1500
She pays six equal installments.
Amount of installments = 1500/6 = 250
Monthly installments = £250
Using proportions, it is found that her monthly payments are of £250.
The deposit is of x.The total of monthly payments the remainder, that is, 2400 - x.According to the ratio, we have that:
[tex]\frac{x}{2400 - x} = \frac{3}{5}[/tex]
Applying cross multiplication:
[tex]5x = 3(2400 - x)[/tex]
[tex]8x = 7200[/tex]
[tex]x = \frac{7200}{8}[/tex]
[tex]x = 900[/tex]
Hence, the monthly payments add to £1500.
She makes 6 equal monthly payments, hence:
[tex]p = \frac{1500}{6} = 250[/tex]
Her monthly payments are of £250.
A similar problem is given at https://brainly.com/question/24372153
find the missing angle measure
m<s=
m<u=
Answer and Step-by-step explanation:
The interior angles of a triangle a add up to 180. We can find x by subtracting everything from 180, and then divide for x.
180 = x + 4 + 68 + x
Simplify.
180 = 2x + 72
Subtract 72 from both sides of the equation.
108 = 2x
Divide each side by 2.
x = 54
The angles of the triangle are:
Angle S = 54
Angle U = 58
Angle T = 68
#teamtrees #PAW (Plant And Water)
The vertices of AABC have coordinates A(-2, -1), B (10,-1), C (4,4). State the
area of AABC.
HELP ASAP
Answer:30
Step-by-step explanation:
In the right triangle shown, m\angle Y = 30\degreem∠Y=30°m, angle, Y, equals, 30, degree and XY= 6XY=6X, Y, equals, 6.
Answer:
YZ = 6.93
Step-by-step explanation:
Find the complete question attached
From the diagram, we are to look for YZ
Given the following
XY = adjacent = 6
measure of m<Y = 30degrees
Required
YZ = hypotenuse
Using the SOH CAH TOA identity
Cos theta = adjacent/hypotenuse
Cos 30 = XY/YZ
Cos 30 = 6/x
x = 6/cos30
x = 6/0.8660
x = 6.93
Hence the length of YZ is 6.93
10. Find the measure of exterior angle TUV below. Record your answer on the grid.
Answer:
41
Step-by-step explanation:
what would be the answer
Answer:
B= 21.195
Step-by-step explanation:
Inner circle area = 3.14×1.5×1.5=7.065
Outer circle area = 3.14× 3×3 = 28.26
3 is the radius of the outer circle
Area of the shaded portion is = area of outer circle - area of inner circle
28.26-7.065=21.195
Answer B= 21.195
Given an = 3n-5, what is the common difference?
Answer:
3
Step-by-step explanation:
A common difference is found in arithmetic sequences. The simplified formula for arithmetic sequences, which is what is used here, is [tex]a_{n}=dn-a_{0}[/tex]. Where d is the common difference and [tex]a_{0}[/tex] is the zeroth term. So, in the given equation 3 must be the common difference.
Could someone give me the answer to this question
Answer:
Circumference = 62.8
Step-by-step explanation:
The equation for discovering a circle's circumference is simple:
-------------------------------------------------------
C = 2πr
C is the circumference (how long is the circle around)
R is the radius (half of the width of the circle)
--------------------------------------------------------
So, instead of giving us the radius, they gave us the diameter. (the full width of the circle) So, we divide that by 2 to get the radius.
20/2=10
Now, time to fill in the equation.
C = 2π10
C = 20π
C = 62.8
*They told us to use 3.14 for pi.
Another question how fast is Andrew traveling?
Answer:
DannyStep-by-step explanation:
Danny's speed is given:
15 mphAndrew's speed is found from the table.
Since its the direct relationship, we find it using one pair of values:
Speed = miles/times = 21.75/1.5 = 14.5 mphDanny is faster as 15 mph > 14.5 mph
Speed =Distance/Time
Here speed is equal to slope of box
m=y/xm=29/2m=14.5mphDanny is faster as his one is 15mph
Simplify the expression:
2(2 + 4k)
please help its timed thank u
Answer:the third one (c)
Step-by-step explanation:
A diameter of a circle has endpoints at (-3, 2) and (-3,-3). What are the coordinates of the center
of the circle?
A (0, 3)
B(-3,-1)
C(-6, -1)
D (-3, 0)
Answer:
B (-3, -1/2)
Step-by-step explanation:
2 and -3 are 5 units apart which means that the middle is 2 1/2 from either point. This point is (-3, -1/2)
Have a great day!
1
y>
5x + 3
What is the y-intercept
(xy)
What is the slope
Will the line be solid or dotted
Given:
The inequality is:
[tex]y>5x+3[/tex]
To find:
The y-intercept, slope and type of line (solid or dotted).
Solution:
The slope intercept form of a line is:
[tex]y=mx+b[/tex] ...(i)
Where, m is the slope and b is the y-intercept.
We have,
[tex]y>5x+3[/tex]
The relation equation is:
[tex]y=5x+3[/tex] ...(ii)
On comparing (i) and (ii), we get
[tex]m=5[/tex]
[tex]b=3[/tex]
It means the slope is 5 and the y-intercept is 3.
The sign of the inequality in the given inequality is ">". It means the boundary line is not included in the solution set. So, the boundary line is a dotted line.
Therefore, the slope is 5, the y-intercept is 3 and the line is a dotted line.
What is the equation of a line with a point of (-12,8)and a slope of 1/2?
select the expression that is equivalent to (x+5)^2-(x-3)(x+5)
Answer:
I love algebra anyways
the ans is in the picture with the steps
(hope it helps can i plz have brainlist :D hehe)
Step-by-step explanation:
triangle with angle measures 85°, 35°, and 60°
Answer:
It should equal 180 i think correct me if im wrong
find the coordinates of the midpoint
What is the slope in this situation: A bean plant is growing three inches every two days.
Answer:
I need a picture of the problem to be able to solve it.
Step-by-step explanation:
Find the volume of the hemisphere.
HELPO PLS TYSMMM
I’m bad so help lol
Answer:
no, yes, yes , no, yes
Step-by-step explanation:
PLEASSEE HELP MY ASSIGMENT IS ALMOST DUEEE!!! PLEASE HELP MY I WILL GIVE YOU BRAINLEST
Answer:
ill help you whats the question
Step-by-step explanation:
Answer:
what do we answer I see nothing
Step-by-step explanation:
??
Help me plz !!!!! ):$$:):!:!!::
Answer:
9x - 13 = y
Step-by-step explanation:
big brain
PLEAS HELP ILL GIVE BRAINLIEST
SHOW WORK OR NO BRAINLIEST
Answer:
Marta spent a total of $34.29
Step-by-step explanation:
Since she bought 3 towels for $8.50 each you would do 3 times $8.50 to get $25.50 for the towels and since she bought 5 washcloths for $1.25 each you would do 5 times $1.25 to get $6.25 then you would add the totals to get $31.75. Then you would find out the tax by finding out what 8% of $31.75 is which would be 2.54. So you would add $2.54 to $31.75 to get $34.29. So the total amount of money that Marta spent is $34.29
3 times $8.50 = $25.50
5 times $1.25 = $6.25
$25.50 + $6.25 = $31.75
HELP!!!!!!!!!!!!!!!!!!!!!!
Answer:
C
Step-by-step explanation:
The mean is essentially the average.
Just add all of them together, and divide by the number of numbers you added.
please help both questions marking brainlist
Answer:
rsfkejfnailwknd
Answer:
4) point q is (6,-2)
It is reflected across the y axis and becomes
(-6,-2)
then it goes down 2 and becomes
(-6,-4)
5) Since it can be mapped to the other segment with only reflection it is the same size as the other segment.
25.3 inches
