Answer:
B. -(3/-2)
Step-by-step explanation:
If you would multiply out the negative you would get -3/2
The average grade for an exam is 74, and the standard deviation is 7. The grades are curved to follow a normal distribution.
What is the probability that the grade of a randomly selected students score is more than 60?
Answer:
0.9772 = 97.72% probability that the grade of a randomly selected students score is more than 60.
Step-by-step explanation:
Normal Probability Distribution:
Problems of normal distributions can be solved using the z-score formula.
In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the z-score of a measure X is given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.
The average grade for an exam is 74, and the standard deviation is 7.
This means that [tex]\mu = 74, \sigma = 7[/tex]
What is the probability that the grade of a randomly selected students score is more than 60?
This is 1 subtracted by the pvalue of Z when X = 60. So
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]Z = \frac{60 - 74}{7}[/tex]
[tex]Z = -2[/tex]
[tex]Z = -2[/tex] has a pvalue of 0.0228
1 - 0.0228 = 0.9772
0.9772 = 97.72% probability that the grade of a randomly selected students score is more than 60.
I need some help! i will try to give brainliest!!!
Answer:
its A because the Y intercept is at 3
Find the value of x
A. 8
B. 12
C. 4
4. 16
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Answer:
C) 4
Step-by-step explanation:
We observe that the top segments are in the same 3:4 ratio as the bottom segments. This means they are the same lengths: 3x = 12, 4x = 16. Either of these equations tells us x = 4.
_____
Additional comment
In case you aren't convinced, you can solve this using the secant rule for segments and circles: the product of the lengths to the circle intercepts are the same for both secants.
12(12 +16) = 3x(3x +4x)
336 = 21x² . . . . . simplify
16 = x² . . . . . . . . divide by 21
4 = x . . . . . . . . . .positive square root
You deposit $200 each year for 10 years into a sinking fund that pays 6% interest compounded annually. What is the future value of your fund?
Answer:Deposita $ 200 cada año durante 10 años en un fondo de amortización que paga el 6% de interés compuesto anualmente. ¿Cuál es el valor futuro de su fondo?
Step-by-step explanation:
need help ASAP please
Answer:
x = 5
Step-by-step explanation:
im too tired to explain just trust me
(5) + 2 = 7
2(5) + 3 = 13
13 * 7 = 91
Step-by-step explanation:
Given area = 91m²
length = 2x+3 m
breadth = x +2 m
we know,
Area = length x breadth
91 = (2x+3) x (x+2)
91 = 2x² + 4x + 3x + 6
91 = 2x² + 7x + 6
2x² + 7x - 85 = 0
(2x+17)(x−5)=0
2x+17=0 or x−5=0
x=−17/2 or x=5
How can you use scale factor to determine the scale drawing?

To find the scale factor, locate two corresponding sides, one on each figure. Write the ratio of one length to the other to find the scale factor from one figure to the other. In this example, the scale factor from the blue figure to the red figure is 1.6 : 3.2, or 1 : 2.
What is the midline of the function?
A. Y=0
B. Y=2
C. Y=1
D. Y=4pi
Answer:
C
Step-by-step explanation:
The trig equation
[tex]a \sin(bx) + d[/tex]
where d represent the midline.
D is represented by positive 1 so y=1 is the midline.
someone please help me on this
Answer:
12 ft
Step-by-step explanation:
From the question given above, the following data were obtained:
Angle θ = 41.5°
Opposite = 8 ft
Length of handrail =?
We can obtain the length of the handrail by calculating the Hypothenus. This can be obtained as follow:
Angle θ = 41.5°
Opposite = 8 ft
Hypothenus =?
Sine θ = Opposite /Hypothenus
Sine 41.5 = 8 / Hypothenus
0.6626 = 8 / Hypothenus
Cross multiply
0.6626 × Hypothenus = 8
Divide both side by 0.6626
Hypothenus = 8 / 0.6626
Hypothenus = 12 ft
Thus, the Lenght of the handrail is 12 ft
Can you help me. .................
Answer:
i think its c
Step-by-step explanation:
A deli serves 4 kinds of lunch meats, 3 kinds of breads, and 3 types of sauce. How many sandwiches can be created with one type of lunch meat, one type of bread, and one type of sauce?
A.10
B.36
C.12
D.45
Answer: I think you multiply each one to get 36
Step-by-step explanation:
Find the area of this circle. Use
3.14 for .
5 ft
The area of the circle is about it.
(Round to the nearest hundredth as needed.)
Step-by-step explanation:
If 5 was the radius, do 3.14 (5)^2 same thing as= 3.14 times 25
Which equals 78.5 (I rounded it also)
Let me know if it was correct!
pls help me in math pls the question : the time on this clock as minutes to?
Answer:
22 minutes to 7
Step-by-step explanation:
short hand is near 7
Answer: 22 minutes to 7
The side lengths of a triangle are 6, 8, and a 10. Is this a right triangle?
Answer:
Yes
Step-by-step explanation:
a^2+b^2=c^2 is for right triangle so
6^2+8^2=10^2
36+64=100
100=100
so it's a right triangle
A retail store had total sales of $436, $650, $530, $500, $650, $489, and $423 last week. Which measure of data would make the store’s sales last week appear the most profitable? Find
Mean
Median
Explanation
The most common measures are mean, median, and mode. MIS. Measure ... For an even amount of data values - Calculate the mean of the two middle numbers. ... store had total sales of $436, $650, $530, $500,$650, $489, and $423 last week. ... would make the store's sales last week appear the most profitable? Explain.
The mean and the median of the data will be $525.43 and $500, respectively.
What is Mean?The mean is the straightforward meaning of the normal of a lot of numbers. In measurements, one of the markers of focal propensity is the mean. The normal is alluded to as the number-crunching mean. It's the proportion of the number of genuine perceptions to the absolute number of perceptions.
A retail store had total sales of $436, $650, $530, $500, $650, $489, and $423 last week.
Then the mean of the data will be
Mean = (436 + 650 + 530 + 500 + 650 + 489 + 423) / 7
Mean = $525.43
Arrange the data in ascending order, then we have
$423, $436, $489, $500, $530, $650, $650
Then the median of the data will be
Median = $500
More about the mean link is given below.
https://brainly.com/question/521501
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Plz give 8th and 9th question
Answer:
for number 8 it is the multiplictivie inverse because you just do 8/9 x 2 so it would be correct and for number 9 it is not the multiplicative inverse because it is not reversing it also can i pls get brainliest
Step-by-step explanation:
Oliver had m dollars to spend on a backpack for the new school year. The expression below represents the amount of money he had remaining after purchasing the backpack.
m - (y + 0.07y)
If his total purchase included the backpack and tax, which statement best describes y?
A.
The amount of money he had to spend on the backpack.
B.
The amount of tax for the backpack.
C.
The price of the backpack, including tax.
D.
The price of the backpack, not including tax.
Answer:
Option A
Step-by-step explanation:
Y is the amount of back pack
The total amount is represented by m
If Y is the cost of back pack purchased by Oliver, then 0.7 Y is the tax applicable on the purchase of back pack
Hence, the remaining cost would be total amount with Oliver minus the cost of back pack and the tax applicable on the purchase of back pack
Remaining cost = m - (y + 0.07y)
Hence, option A is correct
Jewel buys a toy horse for $36. The store increases their purchases price by 10%. What is the sales price of the toy horse?
Answer:
Step-by-step explanation:
4. 29 degrees, x , 12
Solve for x. Round to the nearest tenth
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Answer:
24.8
Step-by-step explanation:
The mnemonic SOH CAH TOA reminds you of the relation ...
Sin = Opposite/Hypotenuse
sin(29°) = 12/x . . . . . . . . . . . use given values
x = 12/sin(29°) ≈ 24.752 . . .multiply by x/sin(29°)
x ≈ 24.8
Tracy is filling the box with unit cubes that are 1 inch (in.) on each side. She will fill the box with cubes without any gaps or overlaps. What is the volume of the box
Answer:48
Step-by-step explanation:
ANSWER AND STEPS PLEASE
A container that holds wheat is shaped like a cone. The diameter of the base of the container is 21 and 3/4 feet, and the height of the container is 10.3 feet.
Which measurement is closest to the volume of the container in cubic feet?
Answer choices:
A. 15,307.55 ft3
B. 1,275.63 ft3
C. 5,102.52 ft3
D. 3,826.89 ft3
Answer:
answer is b.
Step-by-step explanation: use formula
V=1/3(hπr²)
so using this formula gives us 1275.62897 but rounded off gives us 1,275.63 ft3
ok the diameter is 21 3/4ft i converted it to a decimal, 21.75ft so to get the radius i 21.75ft/2= 10.875ft
ok to continue
V=1/3(hπr²)
V=1/3(3.14*10.875ft)h
V=1/3(118.265625ft)
V=1/3(118.265625 ft)10.3ft
V=1275.62897 which rounded=1,275.63 ft3
8 less than the product of a number x and 4
Answer:
4x-8
Step-by-step explanation: 4x is 4 times x and 8 less is subtraction.
Which point would be reflected across the y-axis to (-3,-9)
A. (-3,9)
B. (3,-9)
C. (-9,3)
D. (9,-3)
Answer:
b
Step-by-step explanation:
when an reflected across the y axis only the x value changes and it changes negatively
Which expression correctly gives the area of a circular piece of metal that has an 8 inch diameter?
XZ¯¯¯¯¯¯¯¯ is the bisector of ∠WXY. If m∠WXY=9x+12 and m∠YXZ=6x−6, what is m∠WXZ?
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Answer:
42°
Step-by-step explanation:
The angle bisector means ∠WXZ = ∠YXZ.
∠WXY = 2×∠YXZ
9x +12 = 2(6x -6)
9x +12 = 12x -12 . . . . eliminate parentheses
24 = 3x . . . . . . . . . . add 12-9x
48 = 6x . . . . . . . . . multiply by 2
∠WXZ = 6x -6 = 48 -6 . . . . use the expression for the angle value
∠WXZ = 42 . . . degrees
Please help me FAST
HELP
Answer:
Step-by-step explanation:
Answer:
"The number of bags of salt sold at West varied less than the number sold at South."
And
"The number of bags of salt sold at North and South varied about the same amount."
A batter hits a baseball with an initial horizontal speed of 74 mph and an initial rate of climb of 61 mph. How fast is the ball traveling when it leaves the bat? ____mph When the ball leaves the bat, what angle does it initially form with the horizon?___ ° In this context, gravity will change the ball's rate of climb over time but has no effect on the ball's horizontal speed. If the ball lands 2.851 seconds after it was hit, how many feet did the ball travel? (Recall that there are 5,280 feet in one mile and 3600 seconds in one hour.) ______feet
Answer:
when it leaves the bat ,it travels at 95.9mph
the angle made is 39.5°
distance travelled is 238.76ft
In Euclidean geometry, a parallelogram is a simple quadrilateral with two pairs of parallel sides. The opposite or facing sides of a parallelogram are of equal length and the opposite angles of a parallelogram are of equal measure. A triangle is a polygon with three edges and three vertices. The sum of all the angles of a triangle is 180 degrees. Mathematically -
∠x + ∠y + ∠z = 180°
There are different types of triangles such as -
equilateral triangle , scalene triangle , isosceles triangle etc.
Given is a batter hits a baseball with an initial horizontal speed of 74 mph and an initial rate of climb of 61 mph.
[A] -
The initial speed of the ball when it leaves the bat will be -
v = √(v(h)² + v(c)²)
v = √((74)² + (61)²)
v = 95.9 mph
[B] -
The angle made will be -
Ф = tan⁻¹(61/74) = 39.49°
Therefore -
The initial speed of the ball when it leaves the bat will be 95.9 mph.The angle made by the ball with horizontal is 39.49°.To solve more questions on 2 -D figures, visit the link below-
brainly.com/question/25950519
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[Question in english -
The area of a triangle is 36 square feet and the base is 9 feet. What is the height of the triangle in inches?]
I need some help! I will try to give brainliest
Answer:
Hello!
The graph of this would be to start from the bottom from (0,-4) until it passes through the point (1.3333,0). Something like this
Step-by-step explanation:
A polyhedron (not regular) has 10 vertices and 5 faces. How many edges does it have?
Answer:
13 edges
Step-by-step explanation:
Euler's formula for polyhedra states that
F + V - E = 2 ( F is faces, V is vertices and E is edges ) , then
5 + 10 - E = 2
15 - E = 2 ( subtract 2 from both sides )
13 - E = 0 ( add E to both sides )
13 = E
The polyhedron has 13 edges
The sum of two numbers is 17 and the quotient is 70
Answer:
The Sum of 2 Numbers is 17 & Their Product is 70. Find the Numbers -
Step-by-step explanation:
The Factors of 70 are - 1, 2, 5, 7, 10, 14, 35 & 70
Now, Find the two Factors, when added gives the Sum as 10 & the Product of Multiplication as 17 -
From the given Statement, we can see that when the Factors 7 & 10, when Added gives the Sum as 17 and Their Product as 70 *(7 + 10 = 17 ; 7 × 10 = 70)
Therefore, the two Numbers are 7 & 10
A pair of jeans cost $85 but are on sale for 45% off. What is the sale price?
Answer:
46.75 dollars
Step-by-step explanation:
If the jeans are on sale for 45% off, then they will cost 55% of the original price (100%-45%=55%).
Therefore, the sale price is:
85×55%
Change % into a decimal
= 85×0.55
= 46.75
Therefore, the sale price of the jeans is 46.75 dollars.
I hope this helps!