Answer: Mean = 52.8 mins
Step-by-step explanation:
We have lapses of 30 minutes, so we can write the average for each, this means that:
0 < t < 30 can be averaged to the middle of the range: 15 min.
Doing this, we have that:
7 students 15 min
27 students 45 min
12 students 75 min
4 students 105 min.
Now we can calculate the mean:
mean = (x1*n1 + x2*n2 + ...)/N
where x1 is the amount of time 1, and n1 is the number of students associated to that time and so on. N is the total number of students
Mean = (7*15min + 27*45min + 12*75min + 4*105min)/(7 + 27 + 12 + 4)
Mean = 52.8 mins
Which of the following ordered pairs is a solution of the function ƒ(x) = 3x – 1? Question 10 options: A) (–1, 4) B) (–1, –3) C) (–1, –4) D) (–1, 2)
Answer:
C) (-1,-4)
Step-by-step explanation:
f((x) = 3x -1
Substitute x = 0 (f (x) = 0)
0 = 3x-1
Move the variable to the left:
-3x = -1
Divides both sides by -3
X = 1/3
Ellis has 29 nickels, 45 dimes, 14 quarters, and 18 fifty-cent piece. How much money does he have
Answer:
$18.45
Step-by-step explanation:
1.45 in nickels
4.5 in dimes
3.5 in quarters
9 in fifty cent piece
now you add them
1.45+4.5+3.5+9=
Answer:
$18.45
Step-by-step explanation:
145 + 450 + 350 + 900 =
1.45 + 4.50 + 3.50 + 9 = 18.45
Determine the slope of the line passing through the points (3, 6) and ( – 3, – 6).
Answer:
idk lol
Step-by-step explanation:
dsdasdasadsadasdsd
WILL MARK BRAINILEST
Find the missing angle:
Answer:
The missing number i think is 85
Step-by-step explanation:
I think it is 85 because 100 - 75 is 25 so i subtracted 110 by 25 and got 85
Answer:
Step-by-step explanation:
I don't say you have to mark my ans as brainliest but if it has really helped u plz don't forget to thank me...
hi got a question!
.A Container holds 400 litres of water when a quarter full. Calculate the height of the container if its base area is 4 m^2.
BE QUICK PLEASEEE!!!
Answer:
The container's base is 2 by 2 meters
If it contains 400 liters, its height must be 100 cm
2 x 2 x .10 meters = .4 cubic meters = 400 liters
Step-by-step explanation:
can someone please help me
Answer:
Below in bold.
Step-by-step explanation:
If I have interpreted the question correctly it is:
3*3*3*3 *x*x*x*x = 34
81 x^4 = 34
x^4 = 34/81
x = +/- (⁴√34) / 3 is the exact answer , or:
x = +/- 0.805 to nearest thousandth.
The ratio of the volumes of two spheres is 64/125 what is the ratio of their sides?
Answer:
12:25
Step-by-step explanation:
A force of F = 1.12 × [tex]10^{4}[/tex] Newtons does work of W = 1.18 × [tex]10^{6}[/tex] joules. What is the approximate displacement in meters (Displacement = Work ÷ Force)?
A. 230 m
B. 132 m
C.105 m
D. 95 m
Answer:
[tex]105m[/tex]
Answer C is correct
Step-by-step explanation:
[tex]d = \frac{w}{f} \\ = \frac{1.18 \times {10}^{6} }{1.12 \times {10}^{4} } \\ = 1.05 \times {10}^{6 - 4} \\ = 1.05 \times {10}^{2} \\ = 105m[/tex]
hope this helps
brainliest appreciated
good luck! have a nice day!
The right answer is 105m
please see the attached picture for full solution
Hope it helps
What are the coordinates of the Vertex of the parabola whose equation is y=x^2-2x-4?
Answer:
(1, -5)
Step-by-step explanation:
which sign makes the statement true? pls help!
The correct symbol for the inequality is,
⇒ 59/81 > 23/56
We have to given that,
An expression is,
⇒ 59/81 Ο 23/56
Now, We can simplify as,
⇒ 59/81 = 0.73
⇒ 23/56 = 0.46
Hence, We get;
⇒ 0.73 > 0.46
⇒ 59/81 > 23/56
Thus, The correct symbol for the inequality is,
⇒ 59/81 > 23/56
Learn more about the inequality visit:
https://brainly.com/question/25944814
#SPJ2
3.
(07.02 LC)
How many solutions does the equation - 2y + 2y + 3 = 3 have? (1 point)
One
None
Infinitely many
Three
Answer:
Step-by-step explanation:
One
The length of a rectangle is 3 more than the width. Find the length of the rectangle
if the perimeter is 98 in.
24.5 in
47.5 in
23 in.
26 in.
Answer:
26 in.
Step-by-step explanation:
Since you already have choices, you can simply guess and check which answer is correct:
26-3=23
(26×2)+(23×2)=98
A circle of red roses is planted in Lowell's central park. The circle has a radius of 1 meter.
What is the circle's circumference?
Use 3.14 for .
Answer:
The circle's circumference is 6.28 m.
Step-by-step explanation:
We have,
The circle has a radius of 1 meter.
It is required to find the circumference of the circle. The formula of the circumference of circle is given by :
[tex]C=2\pi r[/tex]
r is radius
[tex]C=2\times 3.14\times 1\\\\C=6.28\ m[/tex]
So, the circle's circumference is 6.28 m.
Select the correct answer,
Identify the system of linear equations from the tables of values given below.
Answer:c
Step-by-step explanation:
Answer:
C
Step-by-step explanation:
I took the test
7 watermelons cost $8.96.Which equation would help determine the cost of the 5 watermelons? Into two fractions with a expontnet
This is very important please help
Answer:
hola CTM
Step-by-step explanation:
Please help :3 I really need help with this
Answer:
0
Step-by-step explanation:
It would not change at all. Mode is the most often occuring number, and adding one 9 will not change the fact that there are threes 6s. Therefore, the mode will stay 6
I need help on this math question :,D (data table)
Answer:
d=8c
Step-by-step explanation:
I need quick help with #7 for geometry
3rd one Beacuse you have to multiply hshshshshshshehhshenshehehehehehej
The graph on the coordinate grid represents the altitude of a plane during a flight. A graph.Short description, A graph.,Long description, The graph shows the x-axis is labeled Time in minutes, and the y-axis is labeled Altitude in feet. The line increases steadily from the origin to 30 minutes, 35,000 feet. The line remains at 35,000 feet until 90 minutes, and then decreases steadily from 90 minutes, 35,000 feet to 100 minutes, 0 feet. Question At which approximate rate, in feet per minute, did the plane climb to the cruising altitude of 35,000 feet? Answer options with 5 options A. 30 feet per minute D. 2,000 feet per minute B. 117 feet per minute E. 2,333 feet per minute C. 1,167 feet per minute
Answer:
C. 1,167 feet per minute
Step-by-step explanation:
We want to find the slope of the first part of the graph, which was an increasing line from the origin (0, 0) to 30 minutes, 35000 feet. This point that represents 30 min and 35000 ft can be written as the ordered pair:
(30, 35000)
Slope is change in y divided by change in x. Here our two points are (0, 0) and (30, 35000). The change in y is the difference in y-coordinates:
35000 - 0 = 35000
The change in x is the difference in x-coordinates:
30 - 0 = 30
Now divide these two:
35000 ÷ 30 = 1166.67 ≈ 1167 feet per min
The answer is thus C.
Answer:
C
Step-by-step explanation:
Rate of climbing is the slope of the altitude-time graph
slope: (35000-0)/(30-0)
35000/30
1166 ⅔
Approximately, 1167 feet per minute
Consider the function p(t) shown, state the intervals on which the function is increasing.
A)
t < 1 and 3 < t < 4
C)
1 < t < 3 and t > 4
B)
t < 1 and 3 < t < 5
D)
0 < t < 2 and t > 5
Answer:
1 < t < 3 and t > 4
Step-by-step explanation:
The function begins increasing at t = 1 and stops increasing at t = 3. It begins increasing atgain at t = 4.
In interval notion: that'd be 1 < t < 3 and t > 4
Answer:
C if your doing prep
Step-by-step explanation:
math
John should drive to his workplace and back to home. On the way to the workplace it was raining, so he drove at speed of 42mph. On the way back the rain was over so his speed was 54mph. What was John's average speed, for the whole trip? PLEASE ANSWER ASAP!! Thanks!
Answer:
48 mph
Step-by-step explanation: Add 42mph and 54 mph and you get 96. To find the average of the two --- divide 96 by 2 and you get 48mph as the average speed for the entire trip.
Help please!!!!!!
Right △EFG has its right angle at F, EG=8, and FG=6.
What is the value of the trigonometric ratio of an angle of the triangle?
Answer:
I. sec G = 4/3
II. cot G = (3√7)/7
III. sin E = ¾
Step-by-step explanation:
Given
Right angled triangle
EG = 8
FG = 6
Required
sec G
cot G
sin E
First, the length of the three sides of the triangle must be completed.
From the attachment below, we can deduce that (by using Pythagoras theorem)
Hyp² = Adj² + Opp²
EG² = FG² + EF²
Substitute EG = 8 and FG = 6
8² = 6² + EF²
64 = 36 + EF²
Collect like terms
EF² = 64 - 36
EF² = 28
Take square root of both sides
√EF² = √28
EF = √28
EF = √(4 * 7)
EF = √4 * √7
EF = 2 * √7
EF = 2√7.
Now, the trigonometric functions can be solved.
i. sec G.
sec is the reciprocal of cos .
So, we need to solve first for cos G
cos G = Adj/Hyp
Here, adj = 6 and hyp = 8
So,
cos G = 6/8
cos G = ¾
So,
sec G = 1/(¾)
sec G = 4/3
ii. cot G
cot is the reciprocal of tan
So, we need to solve first for tan G
tan G = Opp/Adj
Here, adj = 6 and opp = 2√7
So,
tan G = 2√7/6
tan G = √7/3
So,
cot G = 1/(√7/3)
cot G = 3/√7
Rationalise
cot G = 3/√7 * √7/√7
cot G = (3√7)/7
iii. sin E
sin E = Opp/Hyp
Here, Opp = 6
Hyp = 8
So,
sin E = 6/8
sin E = ¾
if you could explain and answer I’d appreciate
Answer:
-10
Step-by-step explanation:
5 is lower than 15 so the answer must be negative
if 15 minus 5 is 10
then 5 minus 15 has to be 10
Could someone help me with this? That would be great.
Answer:
23x - 11/6
Step-by-step explanation:
1/6(36x - 11)+17x
Distribute
1/6*36x -1/6*11 +17x
6x -11/6 +17x
Combine like terms
23x - 11/6
The area of the triangle below is 6.63 square centimeters. What is the length of the
base?
Answer:
(13.26/h) cm = base
Step-by-step explanation:
Formula for area of triangle
= 1/2* base*height
Base = b
Height = h
And the area = 6.63 square centimeters
Area = 6.63cm²
6.63cm²= (1/2)*b*h
6.63*2= bh
13.26= bh
13.26/h = b
(13.26/h) cm = base
f(x) = x2 – 8x – 9 , what is the vertex of this function?
Answer:
Vertex: (4;-25)
Step-by-step explanation:
I know because I answered it already
12 kids brought gifts to the party. This was 60% of the kids who attended the party. What equation can be used to find the number of kids who attended the party?
Answer:
Number of kids who attended the party = 12 / 0.60
Step-by-step explanation:
60% = 12
[tex]x[/tex] x 0.60 = 12
Number of kids attending = [tex]x[/tex] = 12 / 0.60
What is the next term of the geometric sequence?
40 20 10
27' 9'3?
Answer:
40, 20, 10, 5, . . .
27, 9, 3, 1, . . .
Explanation:
For the first one, the previous term is divided by 2 to get the next term. For the second one, the previous term is divided by 3 to get the next term.
find the quotient 2/3 divided by 4/5
Answer:
(2/3)/(4/5)=5/6
Step-by-step explanation:
Decide if the relationship described by the table of values is a function or not.
Answer:
Yes
Step-by-step explanation:
A function is a function when each domain is paired with exactly 1 range. So, this also means that there can't be a domain with more than 1 of the same number. Meaning 2 3's or 4 2's.