Answer:
B
Step-by-step explanation:
Mathematically, we shall be using the z-score here
Z-score = (x-mean)/SD
From the question, mean = 80 and SD = 4
So we want to get the option in the question that has a z-score of 1 or below
Let’s look at 75
80-75 = 5 ( this is clearly above 1 standard deviation of 4)
For 77;
80 -77 = 3
This is less than the standard deviation of 4, meaning it is within 1 standard deviation of the mean
Option B) is correct.
Step-by-step explanation:
Given :
Mean [tex](\mu)[/tex] = 80
Standard Deviation [tex](\sigma)[/tex] = 4
Calculation :
We have to find the score that would be 1 deviation from the mean. Which means, the interval [tex](\mu-\sigma, \mu+\sigma)[/tex]
[tex]\mu-\sigma = 80-4=76[/tex]
[tex]\mu+\sigma =80+4=84[/tex]
The interval is (76,84)
Therefore, option B) is correct.
For more information, refer the link given below
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What is the solution to this equation:
5x=35
Answer:
7
Step-by-step explanation:
5x = 35
Divide both sides by 5
x = 7
Whenever you have an equation like this, you have to simply divide both sides by the coefficient.
A parabolic heater has a cross section modeled by a parabola with vertex (0,0\right) and focus (2,0\right) . The heater has a depth of 5 inches. What is the width of the parabolic heater at its widest point? Round your answer to the nearest hundredth.
Answer:
y = 6.93
Step-by-step explanation:
Given the Vertex and ficuas of a parabola as :
Vertex (0,0) ; focus(0,2) ; depth = 5 inches
Width of parabolic heater at its widest point :
General equation of a parabola:
4p(x - h) = (y - k)²
(h, k) = Vertex
hence,
h =0 ; k = 0 ; p = 2 ; x = 5
(y - k)² = 4p(x - h)
(y - 0)² = 4*2(6 - 0)
(y-0)(y-0) = 8(6 - 0)
y² = 48 - 0
y² = 48
y = 6.928
y = 6.93
Answer:
8.33,236.67
Step-by-step explanation: im hard but i got it right
find the coordinates of the midpoint AB A(0,0) B(8,2)
Answer:
(4,1)
Step-by-step explanation:
could u plz vote me brainliest? thx :)
The department store sells logo t-shirts at an original price of $12.50. Every month that a t-shirt doesn’t sell, the store reduces the price by 25%. Brianna calculated the price after two reductions:
12 dollars and 50 cents minus (12 dollars and 50 cents) (0.25) minus (12 dollars and 50 cents) (0.25) = 6 dollars and 25 cents
What is Brianna’s error?
Answer:
Brianna subtracted $12.50, even though you are not supposed to do that to find the price. You have to subtract $6.50, not $12.50.
The final answer is $7.04 because you subtract two initial prices.
Hope this helps you!
Answer:
The sample answer is :Brianna took both 25% discounts off the original amount. The second discount should have been calculated on the first reduced price of $9.38. The final sale price should have been $7.03.
Step-by-step explanation:
hope this helps :)
20)
Which square root is NOT a whole number?
A)
144
B)
156
C)
169
D)
196
Answer:
196
Step-by-step explanation:
196 does not have a whole number square
Choose the correct data display
Answer:
can you put the photo in please I don't see it ;-;
Step-by-step explanation:
144.144 in word form
Answer:
one hundred forty-four thousands And one hundred forty-four thousandths
Step-by-step explanation:
Meadow is growing her hair out. The graph below shows how much her hair has grown over the last 8 months.
Which of the following shows the rate at which Meadow's hair is growing?
A.) 4 inches per month
B.) 0.50 inch per month
C.) 0.25 inch per month
D.) 2 inches per month
Andy and Christopher are measuring a liquid solution using graduated cylinders. Andy uses 3.5liters of the liquid solution, and Christopher uses 2,580milliliters of the liquid solution. What is the ratio of Christopher's measurements to Andy's measurements in milliliters?
Answer:
129:175
Step-by-step explanation:
Andy and Christopher are measuring a liquid solution using a graduated cylinder
Andy uses 3.5 liters of the liquid solution
3.5 liters to mililiters
= 3.5 ×1000
= 3500 mililiters
Christopher uses 2580 mililiters
Therefore the ratio of Christopher's measurement to Andy's measurement can be calculated as follows
= 2580/3500
= 129 : 175
Hence the ratio of Christopher's measurement to Andy's measurement is 129:175
Please help I’ll give brainiest!
Answer:B
Step-by-step explanation:
I did the google assignment
frank plans to spend no more than $85 on plants for his front garden. He purchases a salvia and three azaleas. The azaleas cost $22 each. Let c be the cost for a salvia. Which inequality below could be used to show how much money Frank spent on salvia?
Answer: 3×22+c≤85
Step-by-step explanation: i think the answer is 3×22+c≤85 because 3x 22 represent the total cost of azaleas + c the cost of salvia is less than or equal to 85 because the buget is 85 and it cannot be great
Hope this helped
1 - 12x = -20 - 9x
What is X?
Answer:
1-12x=-20-9x
-12x=-21-9x
-3x=-21
divide both sides by -3
x=-7
Step-by-step explanation:
List the opposite of the following numbers:
-4, 1, -2.5, 101, 1/2
Answer:
☆<《HOPE IT WILL HELP YOU 》>☆Step-by-step explanation:
The opposite of :-
-4=4
1= -1
-2.5= 2.5
101 = -101
1/2= -1/2
please please help me!!
Answer:
-37/100
Step-by-step explanation:
-0.37 is -37 over 100
Answer:
Step-by-step explanation:
37/100
If x represents a number, then write an expression for a number that is eight less than twice the value of x.
Answer:
2x-8
Step-by-step explanation:
how do you estimate
Answer:
The general rule for estimating is to look at the digit to the right of the digit you want to estimate. Estimating or rounding to the nearest whole number means looking at the digit to the right of the decimal. If you see a digit greater than 5, round up, and if it's less than 5, round down.
Step-by-step explanation:
Evaluate abc2 if a = −3, b = 6 and c = −8.
Answer:
288
Step-by-step explanation:
-3*6*-8*2=288
!!!PLS HELP 20 PTS!!!
Answer:
I believe it would be A: 60°.
Step-by-step explanation:
I suck at explaining stuff but since R is 60°, and theres 120° outside of the triangle, that implies T = 60°. Triangles equal 180° so
60° + 60° + S = 180°
S = 60°
Hope this helps
Answer:
The answer of the question is 60° which is option(A).
here,
let one be suppose angle a°
a°+ 120° = 180° {being straight angle}or, a° = 180° - 120°
or, a° = 60°
a° = 60°
Now,
Let angle S be s°
s°+60°+60° = 180°{ the sum of angle of triangle is 180°}
or, s° = 180° - 120°
or, s° = 60°
therefore, angle S is 60°
Trinity sold candles for $7 each after she paid a $10 setup fee. The equation f(x)=7x-10 shows the profit Trinity will make from selling candles where x is the number of candles and f(x) is the profit she will make. If Trinity has 30 candles to sell, find the domain and range of the function.
Domain: 200
Range: 200
∠1 and ∠2 are complementary angles. Given m∠1=83°, find m∠2.
Reasoning: Complementary angles always add to 90 degrees.
If angle 2 was x, then x+83 = 90 solves to x = 7
The measure of m∠2 is 7° due to the pair of angles being complementary.
What are complementary angles?The complementary angles are defined as when pairing of angles addition to 90° then they are called complementary angles. There are two types of supplementary angles.
Adjacent angles: Adjacent angles are the type of supplementary angles. Adjacent angles have a common side and vertex, for example, a corner point. Their points do not overlap in any way. In other terms, adjacent angles are pairs of two angles next to each other.
We have been given that the pair of angles as
m∠1 = 83° and m∠2 = x
Here, the pairing of angles sums up to 90° then they are called complementary angles.
So x + 83 = 90°
⇒ x = 90° - 83°
⇒ x = 7°
Therefore, the value of m∠2 is 7°.
Learn more about complementary angles here:
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A Muffin Recipe needs 3/5 pound of butter to make 12 muffins, how much butter does the recipe need for 1 muffin
Answer:
1/15
Step-by-step explanation:
Hope it helps
3(x+1)+11 = -2(x+13)
Thank you for the help
Answer:
x = -8
Step-by-step explanation:
3(x+1)+11=-2(x+13)
3x+3+11=-2x-26
3x+14=-2x-26
5x=-40
x=-8
Answer:
x = -8
Step-by-step explanation:
Step 1: Write equation
3(x + 1) + 11 = -2(x + 13)
Step 2: Solve for x
Distribute: 3x + 3 + 11 = -2x - 26Combine like terms: 3x + 14 = -2x - 26Add 2x to both sides: 5x + 14 = -26Subtract 14 on both sides: 5x = -40Divide both sides by 5: x = -8Step 3: Check
Plug in x to verify it's a solution.
3(-8 + 1) + 11 = -2(-8 + 13)
3(-7) + 11 = -2(5)
-21 + 11 = -10
-10 = -10
8. The graph shows the relationship between the United States dollar and
the euro, the currency of the European Union, in December 2011. Part A:
What is the constant of proportionality shown in the graph?*
Exchange Rate (December 6, 2011)
YA
(400, 300)
300
Number of euros
200
(250, 187.50)
100
(120, 90)
0
100 200 300 400
Number of US dollars
Your answer
Answer:
K - Constant of proportionality
Y/X = K
Step-by-step explanation:
Can’t see the graph but the first point can be calculated. If your first point is (100,78) that’s (x,y), your k = 78/100, $78 US dollars and 100 euros, thus the unit rate is 78/100 = 0.78/1 which means 0.78 dollars equals 1 euro.
how many thirds are in 2 wholes? (p.s. I’m in last period and I need this quick)
Answer:
6 thirds
Step-by-step explanation:
Simplify an expression for the perimeter of the equilateral triangle shown below, in centimeters.
Show your work AND Label your answer!
1.75x – 2
Answer:
1.75×2-2
Step-by-step explanation:
Jason works as a salesman. He earns a weekly base salary plus a commision that is a percent of his total sales. The table shows Jason´s total earnings based on total sales. What percent of total sales does Jason receive as commision?
Answer: I don’t see the table so I can’t really help with that unless you can edit the post
Step-by-step explanation:
Marta purchased screws and nails at a hardware store. She paid $0.10 for each screw and $0.05 for each nail. She purchased 15 screws but did not count the number of nails she purchased. She paid a total of $5.20 for the screws and nails. How many nails did Marta purchase?
Answer:
104
Step-by-step explanation:
Based on the total amount spent, we can infer that the number of nails Marta purchased was 74 nails.
Marta purchased 15 screws which cost $0.10 each. The cost is therefore:
= 15 x 0.10
= $1.50
The amount spent on nails is:
= 5.20 - 1.50
= $3.70
If each nail cost $0.05, the total nails bought is:
= 3.70 / 0.05
= 74 nails
In conclusion, 74 nails were purchased.
Find out more at https://brainly.com/question/18245725.
4 (2x + 3) = 4x + 24 + 6x – 6
Answer:
-3 = x
Step-by-step explanation:
4 (2x + 3) = 4x + 24 + 6x – 6
8x + 12 = 10x + 18
12 = 2x + 18
-6 = 2x
-3 = x
Write the number 0.099 in scientific notation.
Answer:
99*10^(-3)
Step-by-step explanation:
When you get a decimal you always have to have a negative when with powers of 10 and 99 is like the decimal 99.0 and if you move the decimal over 3 times you get 0.099
Storm spent less than 9 hours memorizing and filming a scene that was 6 pages long in script. Express this as an inequality using the variable s.
Answer:
7.43
Step-by-step explanation
i Got it by calculating the varible s with 9 over with 6