Suppose you toss a fair coin 4 times. Let X = the number of heads you get. Find the probability distribution of X.
Answer:1 and 2:4
Step-by-step explanation: Because if it's fair you have a 50 percent chance of heads or tails. and if u write it as a ratio you would get 2_4 you will most likely learn this in 7th grade or 6th
If Taylor checks his pulse for 7 minutes, what is his rate if he counts 518 beat?
Answer: 74beats/per minute
Step-by-step explanation:
Divide 518 by 7
Which fraction is equivalent to 2/8
Answer:
1/4 4/16 8/32 16/64
Step-by-step explanation:
Answer:
a simplified fraction is 1/4
Step-by-step explanation:
2/8 (divided by) 2/2= 1/4
PLEASE HELP ASAPPPP ILL DO BRAINLISETT PLSS HELPP
The slope of the line that passes through two points is
(the difference in 'y') divided by (the difference in 'x').
The two points are: (3, -4) and (5, -7)
The difference in 'y' is . . . (-7) - (-4) = -3
The difference in 'x' is . . . (5) - (3) = 2
The slope of the line through those two points is (-3) / (2) .
That's the 3rd choice on the list.
Answer:
The slope of the line that passes through two points is
(the difference in 'y') divided by (the difference in 'x').
The two points are: (3, -4) and (5, -7)
The difference in 'y' is . . . (-7) - (-4) = -3
The difference in 'x' is . . . (5) - (3) = 2
The slope of the line through those two points is (-3) / (2) .
That's the 3rd choice on the list.
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what is b?
12.6=b+4.1
Answer:
b= 8.5
Step-by-step explanation:
To find b, subtract 4.1 to both sides.
12.6= b+4.1
- 4.1 -4.1
8.5= b
Answer:
7.5 = b
Step-by-step explanation:
12.6 - 4.1 = b + 4.1 - 4.1
8.5 = b
please help answer this if your able two :)) ♡
Answer: y = 3/4 + 8.25
Step-by-step explanation:
1. You already know the slope, 3/4, and the coordinates (-7,3). We could plug these into a y=mx+b equation: 3=3/4(-7) + b
2. Next you need to solve for b. Then you get your answer of 8.25. (I attached my work for that)
3. You plug in 8.25 as your y-intercept or b: y=3/4 + 8.25
Mr. Jones operates a dog walking service. He charges $10 plus $25 an hour.
Which equation represents this linear relationship?
The measures of ∠1, ∠2, and ∠3 are 40%, 12.5%, and 25% of the sum of the angle measures of the quadrilateral. Find the value of x.
The value of x is 81
Step-by-step explanation:
The sum of the interior angles of any quadrilateral is 360°
The measure of ∠1 is 40% of the sum of the angle measures of the quadrilateralThe measure of ∠2 is 12.5% of the sum of the angle measures of the quadrilateralThe measure of ∠3 is 25% of the sum of the angle measures of the quadrilateralWe need to find the value of x∵ The figure have 4 sides
∴ The figure is a quadrilateral
∵ The sum of the measures of the interior angles of a
quadrilateral is 360°
- Add the four angles and equate the sum by 360
∴ m∠1 + m∠2 + m∠3 + x = 360
∵ m∠1 = 40% of the sum of the angle measures of the quadrilateral
∴ m∠1 = 40% × 360 = [tex]\frac{40}{100}[/tex] × 360 = 144°
∵ m∠2 = 12.5% of the sum of the angle measures of the quadrilateral
∴ m∠2 = 12.5% × 360 = [tex]\frac{12.5}{100}[/tex] × 360 = 45°
∵ m∠3 = 25% of the sum of the angle measures of the quadrilateral
∴ m∠3 = 25% × 360 = [tex]\frac{25}{100}[/tex] × 360 = 90°
- Substitute these values in the equation above
∴ 144 + 45 + 90 + x = 360
- Add the like terms in the left hand side
∴ 279 + x = 360
- Subtract 279 from both sides
∴ x = 81°
The value of x is 81
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Worth 50 points PLZ HELP ASAP
An F note has a frequncy of 689.46Hz calculate the wavelegnth in meters
Use the formula c = λν to determine wavelength
299792458=689.46λ
434822.1188=λ
Hope this helped!
Answer:
try different keywords
Step-by-step explanation:
5. A spotlight is mounted 7.3 meters high on a pole to illuminate the center of a parking area at
point A. If A is 10.2 meters from the base of the pole,at what angle of depression, 0, should
the spotlight be aimed?
Answer: 54.4°
Step-by-step explanation:
If the spotlight is mounted 7.3 meters high, its height will be 7.3meters.
If A is 10.2 meters from the base of the pole, the base of the pole to the parking area will be 10.2meters
The angle of the depression will be facing the base directly therefore, the base will be the opposite of the triangle formed and the height of 7.3m will be the adjacent.
To get the depression angle, we use the trigonometry identity SOH, CAH, TOA
Since we have opposite and adjacent, we will use "TOA" which means
Tan theta = Opposite/Adjacent
Opposite = 10.2m Adjacent = 7.3
Tan theta = 10.2/7.3
Tan theta = 1.39
theta = arctan 1.39
Theta = 54.4°
The angle of depression that the spotlight should aim at is 54.4°
To find the angle of depression for the spotlight to illuminate point A, one takes the inverse tangent of the ratio of the height of the pole to the distance from the pole to point A (7.3 meters / 10.2 meters).
Explanation:The student has asked to determine the angle of depression that a spotlight should be aimed at to illuminate a specific point on the ground. To find this angle, we use trigonometry, specifically the tangent function, which relates the opposite side (the height of the pole) to the adjacent side (the distance from the base of the pole to point A).
The tangent of the angle of depression (θ) is equal to the opposite side divided by the adjacent side. That is, tan(θ) = height / distance = 7.3 meters / 10.2 meters.
Using a calculator, the angle of depression θ can be found by taking the inverse tangent (or arctan) of 7.3/10.2. Therefore, θ = arctan(7.3/10.2).
Once you calculate this value, you will have the angle of depression at which to aim the spotlight to illuminate point A.
What is the answer
What is 2x minus negative x
Answer:
3x
Step-by-step explanation:
2x--x is the same thing as 2x+x which equals 3x. Hope that helped. ;P
2x minus negative x simplifies to 2x + x, which further simplifies to 3x.
To simplify 2x - (-x), we can apply the concept of subtracting a negative number, which is equivalent to adding its positive counterpart.
The expression -(-x) can be rewritten as +x, since double negation cancels out. Therefore, the expression becomes 2x + x.
Combining like terms, we have 2x + x = 3x.
So, 2x - (-x) simplifies to 3x.
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assume that y varies directly with x, then solve.
if y=-6.6 when x=9.9, find y when x=6.6
y=?
Answer:
y = - 4.4
Step-by-step explanation:
from the question
y = -6.6
x = 9.9
y∝ x
y = kx ..... where k is introduced as a constant of proportionality
solve for k
y=-6.6 and x = 9.9
we have,
-6.6 = k × 9.9
-6.6 = 9.9k
divide both sides by 9.9
-6.6/ 9.9 = 9.9k/9.9
-0.667= k
therefore k = - 0.667
now, find y when x = 6.6
from the equation y = kx
y = -0.667 × 6.6
y = - 4.4
Answer:
-4.4
Step-by-step explanation:
x : y
9.9 : -6.6
6.6 : y
9.9/-6.6 = 6.6/y
y = 6.6 × -6.6/9.9
y = -4.4
At a school
number of boys : number of girls = 11 : 9
There are 124 more boys than girls.
Work out the total number of students at the school.
The Total number of students at the school is 1240.
The given ratio is 11 boys : 9 girls,
Let 11x = boys and
9x = girls.
As 124 more boys are there than girls, so
11x - 9x = 124.
2x = 124
x = 62
The actual number of boys = 11x = 11 × 62 = 682
The actual number of girls = 9x = 9 × 62 = 558
Total number of students at the school = 682 boys + 558 girls = 1240 students
At a game show, there are 7 people (including you and your friend) in the front
row.
The host randomly chooses 3 people from the front row to be contestants.
The order in which they are chosen does not matter.
How many ways can you and your friend both be chosen?
The combination is solved and the number of ways of choosing the contestants is 10
What are Combinations?The number of ways of selecting r objects from n unlike objects is given by combinations
ⁿCₓ = n! / ( ( n - x )! x! )
where
n = total number of objects
x = number of choosing objects from the set
Given data ,
Out of the 7 people in the front row, we need to choose 3 people to be contestants, and we want to count the number of ways that both you and your friend are chosen.
Since we are choosing 3 people, there are 3 positions to be filled. We can think of this as a combination problem, where we need to choose 2 people out of the 5 remaining people in the front row, to fill the two remaining positions after you and your friend are chosen.
The number of ways to choose 2 people out of 5 is given by the combination formula:
C(5, 2) = 5! / (2! (5 - 2)!) = 10
Hence , there are 10 ways to choose you and your friend, and then choose two additional people to fill the remaining positions
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The triangles are similar.
What is the value of x?
Enter your answer in the box
Answer:
x=21
Step-by-step explanation:
Each measurment is multiplied by three, so 7 multiplied by 3 is 21
. The Portman's kitchen table is
rectangular. The table is 4 feet wide
and 8 feet long. Mrs. Portman bought a
tablecloth that will cover 56 square feet.
Is the tablecloth large enough to cover
the table? Explain.
Answer:
Yes
Step-by-step explanation:
The tablecloth is large enough as when you multiply 4×8=32 square feet. Thus meaning a 56 square foot table cloth would be enough.
4×8=32
(3)-2
Evaluate exponent
Answer:
[tex] 3^{-2} = \dfrac{1}{9} [/tex]
Step-by-step explanation:
Definition of negative exponent:
[tex] a^{-n} = \dfrac{1}{a^n} [/tex]
In our case, a = 3 and -n = -2.
[tex] 3^{-2} = \dfrac{1}{3^2} [/tex]
Now we just evaluate the power in the denominator.
[tex] 3^{-2} = \dfrac{1}{3^2} = \dfrac{1}{9} [/tex]
I need a bit of help with this question.
Sorry that the image loaded upside down!
Answer:
Remember, perimeter means addition. And area means multiplying. I see 16 and 12, so do you want me to add 16 and 12 because I see x in. But, 16 plus 12 equal 28. So, 28 in.
Ten more shoes than Rubens
Answer:
What Do You Mean
Step-by-step explanation:
SAT verbal scores are normally distributed with a mean of 433 and a standard deviation of 90. Use the Empirical Rule to determine what percent of the scores lie between 433 and 523.
34% of the scores lie between 433 and 523.
Solution:
Given data:
Mean (μ) = 433
Standard deviation (σ) = 90
Empirical rule to determine the percent:
(1) About 68% of all the values lie within 1 standard deviation of the mean.
(2) About 95% of all the values lie within 2 standard deviations of the mean.
(3) About 99.7% of all the values lie within 3 standard deviations of the mean.
[tex]$Z(X)=\frac{x-\mu}{\sigma}[/tex]
[tex]$Z(433)=\frac{433-\ 433}{90}=0[/tex]
[tex]$Z(523)=\frac{523-\ 433}{90}=1[/tex]
Z lies between o and 1.
P(433 < x < 523) = P(0 < Z < 1)
μ = 433 and μ + σ = 433 + 90 = 523
Using empirical rule, about 68% of all the values lie within 1 standard deviation of the mean.
i. e. [tex]((\mu-\sigma) \ \text{to} \ (\mu+\sigma))=68\%[/tex]
Here μ to μ + σ = [tex]\frac{68\%}{2} =34\%[/tex]
Hence 34% of the scores lie between 433 and 523.
Using the Empirical Rule for normally distributed scores, about 34% of SAT verbal scores lie between 433 (mean) and 523 (mean plus one standard deviation).
Explanation:The Empirical Rule, also known as the 68-95-99.7 rule, applies to a normally distributed set, as we have here with SAT verbal scores. This rule states that approximately 68% of the data falls within one standard deviation from the mean in a normal distribution.
In this scenario, the mean (average) SAT verbal score is 433, the standard deviation is 90. We're going to find what percent of the scores lie between 433 (mean) and 523 (mean plus one standard deviation).
According to the Empirical Rule, approximately 68% of the scores fall within one standard deviation of the mean (both above and below). So about 34% of the scores fall between the mean and one standard deviation above the mean. Thus, about 34% of the students scored between 433 and 523 on the SAT verbal section.
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What is the value of x?
Answer: x = 75
Step-by-step explanation: The first thing to note is that what we have here is a quadrilateral. In other words, all the internal angles sum up to 360°. Also take note that the figure is a parallelogram, which means two sides are parallel to each other. Line AD is parallel to BC, and line DC is parallel to AB. That makes angle D equal to angle B (alternate angles), and angle A equals Angle C.
If the sum of the interior angles of a quadrilateral equals 360, then
x + (x + 30) + x + (x + 30) = 360
x + x + 30 + x + x + 30 = 360
Collecting like terms, we have
x + x + x + x + 30 + 30 = 360
4x + 60 = 360
Subtract 60 from both sides of the equation
4x = 300
Divide both sides of the equation by 4
x = 75.
what is 298.8 subtracted by 4.09
Answer:
294.71
Step-by-step explanation:
298.8-4.09=294.71
Combine the whole number and the decimal parts to get the final answer: 294.71.
The space capsule is moving up at a speed of 80 miles per hour a few seconds
after launch. What is the space capsule's velocity?
Answer:
117.3 feet per second.
Step-by-step explanation:
Velocity is the speed of an object in a definite direction. In mechanics, velocity is a vector quantity. It requires magnitude and direction to make any sense. Velocities are expressed per unit time.
The SI unit of time is the second.
Now, suppose we need the velocity in feet per second. A simple calculation will help:
feet per second = miles per hour × 1.466667 [ in other words, one mile per hour equals 1.466667 feet per second]
For a space capsule moving at 80 miles per hour, the velocity is given by
= 80 × 1.466667
= 117. 3 ft/s [feet per second]
Answer:
80 miles
Step-by-step explanation:
it is 80 miles bc it asked for its speed and that is 80 also i did this on iready a while ago :)
What is 25 more than 50 as an expression
Answer:75
Step-by-step explanation: 50 + 25
What are the roots of the polynomial equation x cubed minus 10 x = negative 3 x squared + 24? Use a graphing calculator and a system of equations.
–24, –3, 12
–12, 3, 24
–4, –2, 3
–3, 2, 4
Option C: -4, -2, 3 are the roots of the polynomial.
Explanation:
The equation is [tex]x^{3} -10x=-3x^{2} +24[/tex]
Now, Adding [tex]3x^{2}[/tex] on both sides, we have,
[tex]x^{3} +3x^{2} -10x=24[/tex]
Subtracting 24 from both sides of the equation, we have,
[tex]x^{3} +3x^{2} -10x-24=0[/tex]
Solving the equation using synthetic division, we have,
[tex](x-2)(x^{2} +x-12)=0[/tex]
Now, we shall factor [tex](x^{2} +x-12)[/tex], we have,
[tex](x+4)(x-3)[/tex]
Thus, we have,
[tex](x+2)(x-3)(x+4)=0[/tex]
Solving each factor, we have,
[tex]$\begin{aligned} x+2 &=0 \\ x &=-2 \end{aligned}$[/tex] and [tex]\begin{array}{r}{x-3=0} \\{x=3}\end{array}[/tex] and [tex]\begin{aligned}x+4 &=0 \\x &=-4\end{aligned}[/tex]
Thus, the roots are -2,3 and 4.
factor this polynomial expression x^2-25
Answer:
x^2-25
Step-by-step explanation:
rewrite 25 as 5^2
x^2-5^2
since both terms are perfect squares, factor using the difference of square s formula, a^2-b^2=(a+b)(a-b) where a=x and b=5
(x+5)(x-5)
plz mark me as brainliest if this helped :)
Answer:
[tex]\[(x+5)*(x-5)\][/tex]
Step-by-step explanation:
Given polynomial expression is [tex]\[x^{2}-25\][/tex]
[tex]\[=> x^{2}-5^{2}\][/tex]
This is of the form [tex]\[a^{2}-b^{2}\][/tex]
An expression of this form can be factorized as [tex]\[(a+b)*(a-b)\][/tex]
Here, a = x and b = 5.
Hence the factorized form of the given polynomial expression can be represented as the following product:
[tex]\[(x+5)*(x-5)\][/tex]
ALPHA WHERE ARE YOU?
An equation is shown below:
7(2x − 3) = 1
Which of the following correctly shows the first two steps to solve this equation?
Step 1: 9x − 7 = 1; Step 2: 9x = 8
Step 1: 9x + 4 = 1; Step 2: 9x = −3
Step 1: 14x − 3 = 1; Step 2: 14x = 4
Step 1: 14x − 21 = 1; Step 2: 14x = 22
Answer:
Step 1: 14x − 21 = 1; Step 2: 14x = 22
Explanation:
7(2x−3)=1
Step 1: Simplify both sides of the equation
7(2x−3)=1
(7)(2x)+(7)(−3)=1(Distribute)
14x+−21=1
14x−21=1
Step 2: Add 21 to both sides
14x−21+21=1+21
14x=22
Step 3: Divide both sides by 14
14x / 14 = 22 / 14
x = 22 / 14: x = 11/7
Answer:
The last option.
Step-by-step explanation:
When distributed, 7 times 2x becomes 14x and 7 times -3 is -21.
Once you add -21 to both sides, 14x is left alone on one side while 22 is on the other
The locations in a city are mapped out on a grid, where the origin represents the city center. A traffic helicopter travels due north and then due east to get to the location at (-3,4) to the location at (7,13).
About how many fewer units would the helicopter have traveled if it went directly from one location to the other?
Answer:
Helicopter have traveled 5.55 units of distance approximately if it went directly from one location to the other.
Step-by-step explanation:
We are given the following in the question:
A traffic helicopter travels due north and then due east to get to the location at (-3,4) to the location at (7,13).
The attached image shows the path of helicopter.
Distance Formula:
[tex](x_1,y_1), (x_2,y_2)\\\\d = \sqrt{(x_2-x_1)^2 + (y_2-y_1)^2}[/tex]
Distance traveled by helicopter =
[tex]d((-3,4),(-3,13)) + d((-3,13),(7,13))\\\\=\sqrt{(-3+3)^2 + (13-4)^2} + \sqrt{(7+3)^2 + (13-13)^2}\\= 9+10\\= 19 \text{ units}[/tex]
If the helicopter goes directly:
[tex]d((-3,4),(7,13))\\\\=\sqrt{(7+3)^2+(13-4)^2}\\\approx 13.45 \text{ units}[/tex]
Difference in distances =
[tex]19 - 13.45 = 5.55\text{ units}[/tex]
Thus, helicopter have traveled 5.55 units of distance approximately if it went directly from one location to the other.
Answer:
i had this question in a quiz on edge and got a 100% on the quiz
here is your answer
Step-by-step explanation:
Which numbers are prime numbers?
Check all that are true.
19
29
17
23
25
none of the above
Final answer:
Prime numbers are numbers that are only divisible by 1 and themselves. The prime numbers in the list are 19, 29, 17, and 23.
Explanation:
In mathematics, prime numbers are numbers that are only divisible by 1 and themselves. They have exactly two distinct positive divisors. To determine if a number is prime, you can check if it is divisible by any number less than itself.
Using the list of numbers given, we can determine which ones are prime:
19 - Prime
29 - Prime
17 - Prime
23 - Prime
25 - Not prime (divisible by 5)
Therefore, the prime numbers in the list are: 19, 29, 17, and 23. The correct statement is: none of the above.