Answer:
Keep all variables (temperature, place, lighting, etc.) constant other than the variable being tested.
Do the test multiple times. The variations must be small.
keep everything calibrated (marked)
record measurement correctly with the correct units
Step-by-step explanation:
Please help me soon as possible !!!!!!!!!!
Express (x+3)^2 as a trinomial in standard form.
Answer:
x^2+6x+9
Step-by-step explanation:
(x+3)^2
(x+3)(x+3)
x^2+3x+3x+9
x^2+6x+9
One number is 3 less than 4 times a second number. The difference of the first number and twice the second number is 7. What are the two numbers?
Answer:
x = -11, y = -2
Step-by-step explanation:
There's two equations. Let's say the first number is x, and the second number is y. Then, there is 4y-3 = x, and 2y-x = 7. We plug in 4y-3 for x into the second equation, and we get 2y - (4y-3) = 7. Solving more gets us -2y + 3 = 7. thus, -2y = 4, meaning y = -2. We plug back into the second equation, getting -4 - x = 7. This 11 = -x, or x = -11.
The dot plots show the number of points that Sophia and Valerie each scored in the first 10 basketball games. The mean for Sophia's Basketball is 8. 5 points and the mean for Valerie's Basketball games is 15. 5 points. The mean absolute deviation of both distributions is 2 points
Part A: The mean number of points scored by Valerie is 2 or 7 or 8. 5 or 15. 5 greater than the mean numbers of points scored by Sophia.
Part B: What multiple of the mean absolute deviation represents the difference in the mean number of points scored by Sophia and Valerie in the first 10 basketball games?
2. 5
3. 0
3. 5
4. 0
The mean number of points scored is the average of points scored
The mean number of points scored by Valerie is 7 greater than the mean numbers of points scored by Sophia.
How to interpret the mean?The given parameters are:
Mean for Sophia's = 8.5 pointsMean for Valerie's = 15.5 points. Mean absolute deviation of both = 2 pointsCalculate the difference (d) between the mean values
d = 15.5 - 8.5
Evaluate the difference
d = 7
Hence, the mean number of points scored by Valerie is 7 greater than the mean numbers of points scored by Sophia.
The multiple of the mean absolute deviation?In (a), we have:
Mean absolute deviation of both = 2 points
Difference = 7
Express as products
Difference = 2 * 3.5
Hence, 3.5 is a factor of the difference between the mean
Read more about mean absolute deviation at:
https://brainly.com/question/447169
Please help + show work
Answer:
8.4
Step-by-step explanation:
42/5 = 8.4
Each value is multiplied by 8.4.
Have an amazing day!
PLEASE RATE!
A bicycle store cost 4500$ per month to operate. The store pays an average of 35$ per bike. The average selling price of each bike is 125$.How many bicycles must the store sell each month to break even
Answer:
50
Step-by-step explanation:
let x be the no of bicycles to be sold
125x = 4500 + 35x
125x-35x = 4500
90x = 4500
x = 50
to exactly match the expenditure, atleast 50 bikes have to be sold
If you're solving a quadratic equation by factoring
what would the factorization of f(x)=2x^2+15x+7
Answer:
(2x+1)(x+7)
Step-by-step explanation:
Using a p-value of .05 means that there is a 95% chance that the results of a study are truly statistically significant. This means that there is still a 5% chance those results are due to chance. This, combined with ________, are two main contributing factors to the reproducibility crisis.
Step-by-step explanation:
”. What this means is that there is less than a 5% probability that the results happened just by random chance, and therefore a 95% probability that a results reflects a meaningful pattern in human psychology. We call this statistical significance, and, statistically speaking, this is a pretty high standard
If this means that there is still a 5% chance those results are due to chance. This, combined with publication bias , are two main contributing factors to the reproducibility crisis.
What is publication bias?When the results of research investigations affect whether or not they are published, it is known as publication bias.
It alludes to the propensity of academics, journals and other interested parties to publish studies with statistically significant or favourable outcomes while omitting or underreporting those with non-significant or unfavourable outcomes.distorted and incomplete.
Learn more about publication bias here:https://brainly.com/question/25877200
#SPJ3
if 7 is mean of 10,3,4,a,6,9,10. Find the value of a
Answer:
Step-by-step explanation:
Mean=((4+10+3+6+9+10+a)/7)=7
=>42+a=49
=>a=7Mean=((4+10+3+6+9+10+a)/7)=7
=>42+a=49
=>a=7
Answer:
a = 7
Step-by-step explanation:
Given:
7 is mean of 10,3,4,a,6,9,10
To Find:
Value of a
Solve:
Mean → [tex]\frac{(4+10+3+6+9+10+a)}{7}=7[/tex]
⇒ 42+a=49
Subtract 42 from both sides
x + 42 - 42 = 49 - 42
Simplify
⇒ a=7
~Learn with Lenvy~
8.
Which fraction would make this equation true? 5 x ?/? = 6 1/4
3/4
4/4
5/4
Fifteen less than the product of three and a number is thirty-six.
what is this in an equation?
Answer:
Let the unknown number be x,
equation would be :- 3x - 15 = 36
which answers are which?
Answer:
Triangle A and B= Acute, Triangle C= Right, and Triangle D= Obtuse
Step-by-step explanation:
Acute= Less than 90 degrees
Right= 90 degrees exactly
Obtuse= More than 90 degrees
You look at the measurements provided and determine your answer.
f(x)=-x^2+6 f(x)=−x 2 +6 \text{Find }f(-1) Find f(−1)
Answer:
7
Step-by-step explanation:
[tex]f(x) = x^{2} + 6[/tex]
[tex]f(-1) = (-1)^{2} + 6\\f(-1) = 1 + 6\\f(-1) = 7[/tex]
I need help finding surface area
i need help finding the answers on this question there is more than one
Answer:
number 1,2 and 3
hope it will help you.
if it is wrong then sorry
Answer:
Here's the correct answers for your queries.
But the last option is not correct because z° and y° do not collectively form 90° which is the complementary angle. And the values are also provided.
Therefore,
The Correct Answers Are:
√A
√B
√C
But not D.
x + y = 95. and y is 2/3 of x. find x and y.
Answer:
{x,y}={60,35}
Step-by-step explanation:
// Solve equation [2] for the variable x
[2] x = y + 25
// Plug this in for variable x in equation [1]
[1] (y +25) + y = 95
[1] 2y = 70
// Solve equation [1] for the variable y
[1] 2y = 70
[1] y = 35
// By now we know this much :
x = y+25
y = 35
// Use the y value to solve for x
x = (35)+25 = 60
Answer:
x=57
y=38
Step-by-step explanation:
(1): x+y=95
(2): y=2/3x
substitute y=(2/3)x in equation (1):
x+(2/3)x=95
Multiply both sides by 3
3x+2x=285
5x=285
Divide both sides by 5
x=285/5
x=57
substitute x=57 in equation (2):
y=2/3×57=38
hence: x=57 , y=38
What is cos 16 degrees
Answer:
-0.96126 but this isn't rounded so you will need to round yourself
Answer:
The answer is
Step-by-step explanation:
HELLPPP PLEASSEE!!!
The spinner has 3 equal sections for each color: green, purple, and orange.
What is the probability of landing on a color other than green?
Enter your answer as a fraction, like this: 42/53
Answer:
2/3
Step-by-step explanation:
so, you have a circle and if you divide it into 3 equal sections each of those sections take only 1/3 of the circle.
1/3 + 1/3 + 1/3 = 1
if one of the thirds is green then the probability of it landing on another color would be 2/3 being the other two colors.
Select the correct answer from each drop-down menu.
A mother tracks the duration of her baby's two daily naps for a few weeks. The mean time and variance, in minutes, for each nap are recorded in
the table. On average the baby takes a longer nap for the (second nap/first nap) the length of the baby’s nap varies more in the (second nap/first nap)
Answer:
second nap,second nap
Step-by-step explanation:
just took it on plato and got 100%
Liquid A has a density of 1.42 g/cm³
7 cm³ of liquid A is mixed with 125 cm of liquid B to make liquid C.
Liquid C has a density of 1.05 g/cm³.
Find the density of liquid B.
Give your answer correct to 2 decimal places.
Step-by-step explanation:
if I understand correctly, then we are mixing 7 cm³ of liquid A with 125 cm³ of liquid B to a liquid C.
A has a density of 1.42 g/cm³.
B has a density of x g/cm³.
the resulting C has a density of 1.05 g/cm³.
the first thing we see is the quantity of C :
C = A + B = 7 + 125 = 132 cm³
what "comes in" must also "come out" again.
there is no mentioning of a chemical reaction, that might cause a change of volume or mass of the mixture.
so, the whole is exactly the sum of its ingredients.
now about mass and density :
as also the mass (g) of the resulting C must be the same as the sum of the masses of A and B, we multiply the density by the quantity of every liquid to get the mass (g). and that is how we get then the missing density of B :
7×1.42 + 125x = 1.05×(7+125)
9.94 + 125x = 1.05×132 = 138.6
125x = 128.66
x = 1.02928 ≈ 1.03 g/cm³
14+5x= 3(-x+3)-11
Find x
Answer:
x=-2
Step-by-step explanation:
[tex]14+5x=3\left(-x+3\right)-11[/tex]
[tex]3\left(-x+3\right)-11[/tex] ← ( Expand)
[tex]14+5x=-3x-2[/tex]
[tex]14+5x-14=-3x-2-14[/tex] ← ( Subtract 14 from both sides)
[tex]5x=-3x-16[/tex]
[tex]5x+3x=-3x-16+3x[/tex]
[tex]8x=-16[/tex]
[tex]\cfrac{8x}{8}=\cfrac{-16}{8}[/tex] ← ( Divide both sides by 8)
[tex]x=-2[/tex]
~
Answer:
-2Step-by-step explanation:
In the question we have given with an equation that is 14 + 5x = 3 ( -x + 3 ) - 11 .
And we are asked to find the value of x.
Solution : -
[tex] \longmapsto \: 14 + 5x = 3( - x + 3) - 11[/tex]
Step 1 : Solving parenthesis on right side :
[tex] \longmapsto \: 14 + 5x = - 3x + 9 - 11[/tex]
On further calculations we get :
[tex] \longmapsto \: 14 + 5x = - 3x - 2[/tex]
Step 2 :
Subtracting 14 from both sides :
[tex] \longmapsto \: \cancel{14} - \cancel{14 }+ 5x = -3x -2 - 14[/tex]
On further calculations we get :
[tex] \longmapsto \: 5x = - 3x - 16[/tex]
Step 3 : Adding 3x on both sides :
[tex] \longmapsto \: 5x + 3x = - \cancel{ 3x} + \cancel{3x} - 16[/tex]
On further calculations we get :
[tex] \longmapsto \: 8x = - 16[/tex]
Step 4 : Dividing by 8 on both sides :
[tex] \longmapsto \: \frac{ \cancel{8}x}{ \cancel{8}} = \cancel {\frac{ - 16}{8} }[/tex]
We get :
[tex] \longmapsto \: \red{\boxed{ \mathfrak{x = - 2}}}[/tex]
Therefore , value of x is -2 .Verifying :We're verifying our answer by substituting value of x in given equation . So ,
14 + 5x = 3 ( -x + 3 ) - 11 14 + 5 ( - 2 ) = 3 { -( -2 ) + 3 ) - 1114 - 10 = 3 ( 2 + 3 ) - 11 4 = 3 ( 5 ) - 114 = 15 - 114 = 4L.H.S = R.H.SHence , Verified .Therefore , our value for x is valid .
#Keep LearningI'm suck on this question can anyone help me
with it Jina has ridden 18 miles of a bike course. The course is 60 miles long. What percentage of the course has Jina ridden so far?
Answer:
30%
Step-by-step explanation:
percentage of the course she has ridden = 18/60 ×100
=0.3×100=30 %
What is the area of this figure?
You can fine the area of the figure by width times height
Why do teachers use a percent when grading school work?
Answer:
easier to grade and to calculate average
Step-by-step explanation:
PLEASE HELP!!
The table below shows how much money you have in savings each week. Answer the questions below
⚠️PLEASE ANSWER ASAP⚠️
Justin spent a total of $15 ice skating. He rented ice skates for $4.50 and skated for 3 hours. Write an equation to determine the cost per hour, h, to ice skate.
Answer:
3h+4.50=15
We know that she skates for 3 hours, but we don't know the cost per hour so is the "h". He pays a start up $4.50 for the ice skates. And he spend $15 in total for ice skating.
Hopefully that helps. Have a great night! Or day!
HELP!!! MATH!!! Plessssssss!!!
Answer:
the answer would be b
Step-by-step explanation:
the other 2 have negatives and the 3rd option is whole so b
- 4x^2 - 7= -11
lesser x =
greater x =
Show Calculator
Answer:
less x is 1 greater x is 1
Step-by-step explanation:
I am the calculator
A wire is in the shape of a rectangle of length 14cm. Find its breadth if the same wire is re- bent into a square of side 13cm. Also find out their areas and write which one encloses more area, the rectangle or square.
Answer:
See below.
Step-by-step explanation:
Area by square = 169
Area by rectangle = 14 x 12 = 168
So more for square hope it helps Alphonsa
7) A classroom had 63 glue sticks. If the ratio of glue sticks to glue bottles was 9 : 1, how man
glue bottles did the classroom have?
Answer:
7 bottles of glue
Step-by-step explanation:
63/9= 7
every time there are 9 sticks, there is one bottle.
Answer:
7 glue bottles
Step-by-step explanation:
Ratio of glue sticks to glue bottles = 9 : 1
Therefore, 9x : 1x
If there are 63 glue sticks in total:
⇒ 9x = 63
⇒ x = 7
Therefore, glue bottles = 1x = 1 × 7 = 7