Answer:
25y = 45/1x = 30
Answer:
x=10; y=2
10+15(2)=40
10+10(2)=30
so this is correct
Step-by-step explanation:
Are the fractions equivalent?
63/72. 7/9
Answer: 9 goes into 63 7 times, but 9 does not go into
72 9 times, so the answer is no.
Step-by-step explanation:
A teacher gave a unit test to both of her statistics classes. The mean test grade for Class A was 77 points, with a standard deviation of 5 points, whereas the mean test grade for Class B was 80, with a standard deviation of 7 points. Kyle, in Class A, received an 82 on the test, and Caleb, in Class B, received an 87. Whose performance on the unit test was better relative to their class?
Answer:
i think they would be the same
Step-by-step explanation:
77+5=82 or 77-5=72
so he is within the range of 72-82
80+7=87 80-7=73
so he is also within the range of 73-87
Since both Kyle and Caleb scored 1 standard deviation above their respective class means, we can conclude that their performances were relatively equal.
What is standard deviation?A standard deviation is a measure of how far apart the data is from the mean.
A low standard deviation indicates that data is clustered around the mean, whereas a high standard deviation indicates that data is more spread out.
To determine whose performance was better relative to their class, we need to calculate their z-scores, which tell us how many standard deviations a particular score is from the mean.
For Kyle in Class A:
z-score = (82 - 77) / 5 = 1
This means that Kyle's score is 1 standard deviation above the mean for his class.
For Caleb in Class B:
z-score = (87 - 80) / 7 = 1
This means that Caleb's score is also 1 standard deviation above the mean for his class.
Thus, we can conclude that Kyle and Caleb's performances were comparable because they both scored one standard deviation above their respective class means.
For more details regarding standard deviation, visit:
https://brainly.com/question/23907081
#SPJ3
John is performing an experiment in which a solution alternates between a clear color and a bluish-purple color at a regular time interval. He observes that the time interval between color changes is 30 seconds (s). Sally replicates the experiment with the same solution, but at a temperature that is 10 degrees Celsius (°C) higher. What is the most likely time interval between color changes at this higher temperature?
Answer:
15 seconds
Step-by-step explanation:
The given parameters for the experiment are;
The time it takes the solution to change from a clear color to a bluish-purple color at a given temperature = 30 seconds
The temperature at which Sally replicates the experiment with the same solution = 10°C higher than the temperature the experiment was carried out by John
Given that the process involves a change in color, which is a characteristic of a chemical reaction, and that the rate of a chemical reaction increases as the temperature of the reacting system is increased, we have time it takes for the solution to change color at a temperature increased by 10°C, will be a time lesser than 30 seconds
Answer:
B
Step-by-step explanation:
What alternatives did the colonists already try in their appeal to Great Britain, according to the text? A They have attempted to reason with the British as equal citizens. B They have pledged eternal loyalty to the crown, in hopes of perhaps gaining British favor. C They have tried many things, including minor insurrections and conflicts. D They have tried many things, including petitions, argument, and pleas to parliament and to the crown
Answer:D. They have tried many things, including, petitions, argument, pleas to parliament and to the crown
Step-by-step explanation:
(3x3 + 4r) + (3.23 – 42° – 9x) =
Answer :
12.23+4r-42°-9x
1.f(x)=0,5x+3 represents a function, Evaluate the function if f(12), *
A. 9
B. 3.04
C. 18
D. 15.5
Helppp pleaseee:))))
1a
2f
3g
4d
5b
6e
7c
I hope this is the answer you were looking for.
77÷ -11
20 points!!!!!
Answer:
7 time 11 is 77 so 77 divided by 11 is 7
Step-by-step explanation:
Answer:
It's -7
Step-by-step explanation:
Find the ordered pairs for the x- and y-intercepts of the equation 5x − 6y = 30 and select the appropriate option below. (5 points)
The width of a rectangle is 3/4 it’s length. The perimeter of the rectangle is 350 ft. What is the length, in feet of the rectangle
Answer:
20
Step-by-step explanation:
[tex]( {x}^{2} - 8x + 6) \div (x + 2)[/tex]
how do you solve this using synthetic division?
4 multiple ( 2+3) square 2
Answer:
100
Step-by-step explanation:
4 x (2 + 3)[tex]^{2}[/tex]
for this equation u have to use PEMDAS so u have to solve the parenthesis first which is 5 then exponets which is [tex]5^{2}[/tex] which is 25 and 24 x 4 gives you 100
hope this helps, if im wrong sorry
Solve for x!!!! (see attached picture) HELP!!!
True or False. a radius is a segment that connects any point on the circle to the center of that circle.
Answer:
True
Step-by-step explanation:
Answer:
true
Step-by-step explanation:
Think about it as a disk, if you were to draw a line starting at the edge of the disk and tried to draw it to the center of it you would be able to do it from any point along the outside of the circle.
What is the length of AB?
B
6x
3x + 9
65°
/65°
A
C
A. 18
B. 12
C. 3
D. 9
Answer: 18
That's the answer on
Answer:
A
Step-by-step explanation:
1 point
Question: A school purchased a total of 112 student tickets and adult
tickets for a field trip to a play. The price of each student ticket was $3.50,
and the price for each adult ticket was $6.50. If the school spent a total of
$437, how many student tickets and adult tickets did the school purchase?
92 student tickets; 20 adult tickets
97 student tickets; 15 adult tickets
O
102 student tickets; 10 adult tickets
88 student tickets; 23 adult tickets
Answer:
the answer is 97 student tickets and 15 adult tickets
Step-by-step explanation:
What is the name of each labeled part?
B
С
B
C
E
A
E
D
Answer:
I know that B is the nucleas but I don't know the rest sorry
Answer:
A: dendrite
B: cell body
C: axon terminal
D: axon
E: nucleus
Step-by-step explanation:
John has a part-time job. He is payed £6.80 per hour. This week he worked for 9 and a half hours. Work out John's total pay for this week.
Answer:
£64.6
Step-by-step explanation:
Multiply £6.80 by 9
£61.2
Now divide £6.80 by 2
£3.4
Add £3.4 to £61.2
The answer is £64.6
(I think)
Hope this helps :)
Graph.
y= 53x–4
Apparently this is way to short and I have to put in 20 more characters to get a "great" answer *eye roll* sooooooooooo blah blah blah balh there more than 20
Answer:
sorry
Step-by-step explanation:
why the hell do our teachers do this to us ;(
A deep freezer is accidentally unplugged, and the temperature increases to 10ºF before an employee notices and plugs the machine back in. The initial temperature of the freezer was –5ºF. The freezer remained unplugged for an estimated 3 hours. Assuming the temperature changed at a steady rate, how much did the temperature change per hour?
Answer:
5 degrees per hour
Step-by-step explanation:
-5+n=10
+5. +5
n=15
15/3=5
what is the area of this composite figure
PLEASE HELP MEE!!!!!!-
Answer:
26 2/3
Step-by-step explanation:
Which fractions have the same value as −1/4 ?
Answer:
Some examples are -2/8, -3/12, -4/16.
Step-by-step explanation:
Explain the difference between parallel and perpendicular lines in terms of their slopes. What form of equation of a line is easiest to determine slope?
Answer:
Parallel lines have the same slope, while perpendicular lines have completely opposite slopes. So a line has a slope of 2, a parallel line would have a slope of 2, and a perpendicular line would have a slope of -1/2. The easiest form to identify the slope is standard form because it shows the slope within the equation with out having to solve the equation or convert it into another form.
Find the length line segment between the points (-2,-1) and (5,6)?
Answer:
7√2 units
Step-by-step explanation:
( [tex]x_{1}[/tex] , [tex]y_{1}[/tex] ) and ( [tex]x_{2}[/tex] , [tex]y_{2}[/tex] )
d = [tex]\sqrt{(x_{2} -x_{1} )^2 + (y_{2} -y_{1})^2 }[/tex]
( - 2 , - 1 )
( 5 , 6 )
d = [tex]\sqrt{(-2-5)^2 + (-1-6)^2}[/tex] = 7√2 units
multiple choice question:
simplify √-72 .
A) -6√2
B) 3√-2
C) 3√2i
D) 3i√2
Answer:
im really not to sure on this one. sorry dude
Step-by-step explanation:
-1/2x = -4/5
Help please
Answer:
x = 8/5
Step-by-step explanation:
first multiply both side by -1, it makes both side positive
1x/2 = 4/5
now multiply both sides by 2 to get the x by itself
x = 8/5
if they want improper fraction x = 1[tex]\frac{3}{5}[/tex]
Answer:
x=-8/5
Step-by-step explanation:
Pls answer I’ll give you brainly
Answer:
D
Step-by-step explanation:
Is my math correct? It's about slop and proportions.
Answer:
yes! it's correct. Congrats :)
Step-by-step explanation:
Answer:
Your answer is correct.
Step-by-step explanation:
(−1,4);(3,0)
(x1,y1)=(−1,4)
(x2,y2)=(3,0)
m= y2−y1 /x2−x1
0−4 /3−(−1 )
−4 /4 = −1
What is the image point of (2,4)(2,4) after a translation left 4 units and down 1 unit?
Answer:
(-2; 3)
.............