A box contains 2 dozen pairs of contact lenses ,of which 8 pairs are tinted. A pair of contact lenses is drawn at random from the box.Find the probability that it is not tinted.What is the answer:2/3 2/5
Answer:
[tex]\dfrac{2}{3}.[/tex]
Step-by-step explanation:
It is given that a box contains 2 dozen pairs of contact lenses ,of which 8 pairs are tinted.
1 dozen = 12 units
Total pairs of contact lenses [tex]=2\times 12 = 24[/tex]
Tinted pairs of contact lenses = 8
Pairs of contact lenses not tinted = 24 - 8 = 16
If a pair of contact lenses is drawn at random from the box, then we need to find the probability that it is not tinted.
[tex]P(\text{Not tinted})=\dfrac{\text{Pairs of contact lenses not tinted}}{\text{Total pairs of contact lenses}}[/tex]
[tex]P(\text{Not tinted})=\dfrac{16}{24}[/tex]
[tex]P(\text{Not tinted})=\dfrac{2}{3}[/tex]
Therefore, the required probability is [tex]\dfrac{2}{3}.[/tex]
you roll a 6-sided die with faces numbered 1 through 6, and toss a coin what is the probability of rolling a 2 or getting heads
Answer:
2/3
Step-by-step explanation:
You have 6 possible outcomes. Getting 1 outcome is 1/6. You have 2 possible outcomes. Getting 1 outcome is 1/2.
Add 1/2 and 1/6 to get 2/3
If x = √3 − √2 , find the value of ( −1/x)root 2
hello
[tex]\dfrac{-1}{x}\sqrt{2}=\dfrac{-\sqrt{2}}{\sqrt{3}-\sqrt{2}}=\dfrac{-\sqrt{2}(\sqrt{3}+\sqrt{2})}{(\sqrt{3}-\sqrt{2})(\sqrt{3}+\sqrt{2})}\\\\=\dfrac{-\sqrt{2}(\sqrt{3}+\sqrt{2})}{3-2}\\\\=-\sqrt{6}-2[/tex]
hope this helps
Write the expression in standard form. -3 + yi = x + 6i
Answer:
The expression in standard form is -3 + 6i
Step-by-step explanation:
Writing complex equation in standard form we have;
-3 + yi = x + 6i
We transfer the real and imaginary parts to be on different sides of the equation as follows;
yi - 6i = x + 3
We factorize the imaginary part;
i(y-6) = x + 3
We note that the real portion on the left hand side of the equation is zero, therefore, we have;
i(y-6) + 0= x + 3
x + 3 = 0
Therefore, x = -3
Substituting the value of x in the first equation, we have;
-3 + yi = -3 + 6i
Comparing gives;
y = 6
The expression in standard form is -3 + 6i.
help if you can but this is kinda urgent any help is welcome tho
Answer:
(Change in y)/(change in x) is defined as the average rate of change.
For a linear equation:
y = a*x + b
A is the average rate of change, and is called the "slope" of the linear equation, and this is a constant.
Then the sentence will be:
"The average change between two ordered pairs (x,y) is the ratio (change in x)/(change in y)
In a linear function, this is called the slope, and it is constant"
lan scores 44 out of 60 marks in a Maths test.
What is his score as a percentage to 1 decimal place?
Answer:
73.3 %
Step-by-step explanation:
To find the percentage
44/60
.73333333
Change to a percentage by multiplying by 100
73.3 %
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▹ Answer
73.3%
▹ Step-by-Step Explanation
44 ÷ 60 = 0.73333333333* 100→ 73.3%
Hope this helps!
- CloutAnswers ❁
Brainliest is greatly appreciated!
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SP=2x+3, and LN=5x−14. Find SP.
Answer:
SP = 43 units
Step-by-step explanation:
Given question is incomplete: find the complete question in the attachment.
From the figure attached,
Length of LN = (5x - 14)
Length of SP = (2x + 3)
By the mid-segment theorem,
"Segment connecting the mid points of two sides of a triangle is parallel and half the length of the third side."
SP = [tex]\frac{1}{2}(\text{LN})[/tex]
(2x + 3) = [tex]\frac{1}{2}(5x - 14)[/tex]
4x + 6 = 5x - 14
5x - 4x = 14 + 6
x = 20
SP = (2x + 3)
= (2×20) + 3
= 43 units
Therefore, measure of SP = 43 units is the answer.
What is the solution to this equation?
4x-3 + 2x= 33
O A. x= 15
B. x = 18
O c. x = 5
O D. x = 6
Answer:
4x – 3 + 2x = 33
6x = 36
x = 6
D. x = 6
Realiza la siguiente divicion 75 ÷ (-5)=
What is the sum of the measures, in degrees, of the interior angles of an 18-
sided polygon?
A. 2880
B. 3600
C. 3240
D. 3060
Answer:
Option (D)
Step-by-step explanation:
Sum of interior angles of a polygon is represented by the expression,
Sum of interior angles = n(n - 1)×180°
Here n is the number of sides of a polygon
If n = 18,
Sum of 18 sided polygon = (18 - 1) × 180°
= 7 × 180°
= 3060°
Therefore, sum of interior angles of a 18 sided polygon will be 3060°.
Option (D) will be the answer.
Answer:
2880
Step-by-step explanation:
SUM=_-2=
18-2=16
16*180 = 2880 OR
18*160 = 2880 degrees
Simplify by combining like terms: 5x + 3x + 10x
Answer:
answer is 8x+10x
18x
is the answer
i will mark brainliest for correct answers!!
200 students attend a school which offers French and History. 10% of those who take History also take French and 4 times as many students take History as take French. 8% of the students take neither History or French. By drawing a Venn Diagram find the probabilty that a student picked at random does History and French. Give your answer as a percentage.
Answer:
8%
Step-by-step explanation:
Hello,
8% of the students take neither History or French
so we have 8*200/100=8*2=16 students out of French and History
let s say that
a is the number of students taking only History
b is the number of students taking both History and French
c is the number of students taking only French
10% of those who take History also take French
so 0.10(a+b)=b <=> 0.10a+0.10b=b
<=> 0.10a+0.10b-0.10b=b-0.10b=0.9b
<=> 0.10a=0.90b
let's multiply by 10 it comes a = 9b
4 times as many students take History as take French
so a + b = 4 (b + c)
it comes 9b + b = 10b = 4b + 4c
<=> 10b-4b=4b+4c-4b=4c
<=> 6b=4c
<=> 3b=2c
<=> c = 3b/2
and we know that a + b + c = 200 - 16 = 184
so
9b + b + 3b/2 = 184 we can multiply by 2 it comes
20 b + 3b = 184*2
23b = 184*2 = 23 * 8 *2 = 23*16
b = 23*16/23 = 16
so b = 16
c = 3*16/2 = 24
c = 24
a = 9b = 144
a = 144
you can see the Venn diagram below
and then the probability that a student picked at random does History and French is 16/200 = 8%
so the answer is 8%
hope this helps
‼️10 points‼️
9. Match the graph with its equation.
A. x= 4
B. y= 4
C. x= -4
D. y= -4
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▹ Answer
C. x = -4
▹ Step-by-Step Explanation
The line passes through the point -4, and a vertical line represents x. Therefore, the answer is x = -4.
Hope this helps!
- CloutAnswers ❁
Brainliest is greatly appreciated!
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Answer:
x= -4
Step-by-step explanation:
The graph shows that the line crosses -4 and stays paralell with y-axis so the equation is x=-4
What are two integers whose sum is -2 and product is -80?
Answer:
We can write:
x + y = -2
xy = -80
We can rewrite the first equation as x = -y - 2 and then plug that into the second equation to get (-y-2) * y = -80 → -y² - 2y = -80 → y² + 2y - 80 = 0 → (y - 8)(y + 10) = 0 → y = 8, -10. Substituting these values into the first equation we get x = -10, 8 so the answer is (x₁, y₁) = (-10, 8) or (x₂, y₂) = (8, -10).
Help me with 2a and 2b please
Answer:
Step-by-step explanation:
A∩B={x| x∈a and x∈B}
a) A∩B={4,6}
b) A∩B={ 4,9}
c) A∩B={yellow,green}
A kayak rental company charges $25.00 to rent a kayak and $3.50 for each half hour it is used. Which linear function best represents the total cost of renting a kayak for 4 hours?
Answer:
y = 25 + 3.5x, where x is a half hour
y = 25 + 3.5 (4 * 2) = $53
Step-by-step explanation:
What expression must be subtracted from 2x-3y+z to give 3x+2y?
Answer:
I hope it will help you.....
Which of the following pairs of functions are inverses of each other?
Answer:
Proved!
Step-by-step explanation:
For two functions f(x) and g(x) to be inverses of each other then;
f(g(x)) = x and g(f(x)) = x condition must be satisfied.
Checking: A. f(x) = 7x³ + 10 and g(x) = ∛[tex]\frac{x - 10}{7}[/tex]
So f(g(x)) = 7([tex]\sqrt[3]{(x- 10)/7}[/tex])³ + 10
We get; 7([tex]\frac{x - 10}{7}[/tex]) + 10 = x - 10 + 10 = x (*This is correct!)
So g(f(x)) = [tex]\sqrt[3]{((7x^3 + 10) - 10)/7}[/tex]
Ten cancels out and we are left with;
[tex]\sqrt[3]{7x^3/7}[/tex] = [tex]\sqrt[3]{x^3}[/tex] = x (* This is also correct!)
Answer: A
Step-by-step explanation: A P E X
A prism has a volume of 405 cubic inches. A prism has a length of 15 inches, height of h, and width of 4.5 inches. Which is the correct substitution for finding the height of the prism? V = l w h. 405 = 15 + 4.5 + h. V = l w h = 15 times 4.5 times 405 V = l w h = 15 times 4.5 times 15 V = l w h. 405 = 15 times 4.5 times h
Answer:
d) 405 = 15 times 4.5 times h
The height of the prism 'h' = 6 inches
Step-by-step explanation:
Explanation:-
Given Volume of prism
V = 405 cubic inches
Given length of the prism
L = 15 inches
Given width of the prism
W = 4.5 inches
The volume of the prism
V = l w h
405 = 15 ×4.5× h
405 = 67.5 h
Dividing '67.5' on both sides , we get
h = 6 inches
Final answer:-
The height of the prism 'h' = 6 inches
Answer: V = l w h. 405 = 15 times 4.5 times h
Step-by-step explanation:
Given the following :
Volume of prism = 405 in^3
Length = 15 inches
Height = h
Width = 4.5 inches
Recall :
The volume of a prism is the product of the Base and the height.
That is;
Volume = Base × height
However, Base of prism is given by the area of the base shape of the prism.
From our parameters Base shape of the prism is a rectangle.
Therefore, Area of rectangle = Length × width
= 15 inches × 4.5 inches = 67.5 inch^2 = Base of prism
Therefore, Volume of prism equals ;
Volume = 15 × 4.5 × h
Volume = 405in^3
Volume = Base × height
405 = 15 × 4.5 × h
If a toy rocket is launched vertically upward from ground level with an initial velocity of 120 feet per second, then its height h after t seconds is given by the equation h(t) = -16t^2 + 120t. How long will it take the rocket to return to the ground? Group of answer choices
Answer:
[tex]Time = 7.5\ seconds[/tex]
Step-by-step explanation:
Given
[tex]Equation:\ h(t) = -16t^2 + 120t[/tex]
[tex]Initial\ Velocity = 160ft/s[/tex]
Required:
Determine the time taken to return to the ground
From the equation given; height (h) is a function of time (t)
When the rocket returns to the ground level, h(t) = 0
Substitute 0 for h(t) in the given equation
[tex]h(t) = -16t^2 + 120t[/tex]
becomes
[tex]0 = -16t^2 + 120t[/tex]
Solve for t in the above equation
[tex]-16t^2 + 120t = 0[/tex]
Factorize the above expression
[tex]-4t(4t - 30) = 0[/tex]
Split the expression to 2
[tex]-4t = 0\ or\ 4t - 30 = 0[/tex]
Solving the first expression
[tex]-4t = 0[/tex]
Divide both sides by -4
[tex]\frac{-4t}{-4} = \frac{0}{-4}[/tex]
[tex]t = \frac{0}{-4}[/tex]
[tex]t =0[/tex]
Solving the second expression
[tex]4t - 30 = 0[/tex]
Add 30 to both sides
[tex]4t - 30+30 = 0+30[/tex]
[tex]4t = 30[/tex]
Divide both sides by 4
[tex]\frac{4t}{4} = \frac{30}{4}[/tex]
[tex]t = \frac{30}{4}[/tex]
[tex]t = 7.5[/tex]
Hence, the values of t are:
[tex]t =0[/tex] and [tex]t = 7.5[/tex]
[tex]t =0[/tex] shows the time before the launching the rocket
while
[tex]t = 7.5[/tex] shows the time after the rocket returns to the floor
Fernando is playing hide-and-seek with Darnel and Joy. Darnel is hiding 5 meters south of Fernando, and Joy is hiding due east of Darnel. If Fernando is 8 meters from Joy, how far apart are Darnel and Joy? If necessary, round to the nearest tenth.
Answer:
6.2 metres apartStep-by-step explanation:
Find attached a diagram for proper elucidation of the question. The resulting shape is a right angled triangle with hypotenuse FJ, and the other two sides DF and DJ respectively.
Using Pythagoras theorem to get the side DJ which is the distance between Daniel and Joy. According to the theorem, the square of the hypotenuse of a right angled triangle is equal to the sum of the other two sides.
FJ² = DF² + DJ²
From the diagram, FJ = 8 and DF = 5. Substituting this values into the theorem above to get DJ;
8² = 5²+DJ²
DJ² = 8²-5²
DJ² = 64 -25
DJ² = 39
DJ = √39
DJ = 6.2 (to the nearest tenth)
This shows that Darnel is 6.2 metres away from Joy
I need help please help me.
Answer:
20°.
Step-by-step explanation:
According to both the diagram and the presented angle measure, m∠RPS + m∠QPR = m∠QPS.
(4x + 27) + (9x - 115) = 107
4x + 9x + 27 - 115 = 107
13x - 88 = 107
13x = 195
x = 15
Now that we have the value of x, we can find the m∠QPR.
9x - 115
= 9 * 15 - 115
= 135 - 115
= 20
So, m∠QPR is 20°.
Hope this helps!
According to the fundamental theorem of algebra which polynomial function has exactly 8 roots
Answer:
option A is correct
Step-by-step explanation:
The number of roots a polynomial has is a factor of the exponent to which it’s highest power is raised
What we are saying here is that the number of roots a polynomial has is equal to the exponent on its highest power
That is why for example a quadratic equation has 2 roots
Now, to get 8 roots, the highest exponent should be 8
After expansion, the first polynomial has a term in the 8th power so it is our answer
The second polynomial, although we have a term in x^4 but it is raised to another 4 which is totally raised to 16 and that cannot be our answer
The correct answer here is the first polynomial
Answer:
Its A on Edge 2020
Step-by-step explanation:
Create a list of steps, in order, that will solve the following equation.
3(x + 1)2 = 108
Solution steps:
- Add 1 to both sides
- Divide both sides by 3
- Multiply both sides by 3
- Subtract 1 from both sides
- Square both sides
- Take the square root of both sides
PLSS HELP!!
Miss Smith bought 60 notebooks and 72 pencils to make identical packages with some notebooks and some pencils for her students. She used everything she bought, and every student got a package. What is the largest number of packages she can make? How many notebooks and pencils would be in each package?
Answer: 12 packages with 5 notebooks and 6 pencils in each package.
Step-by-step explanation:
The greatest common factor of 60 and 72 is 12. Thus divide both numbers(60 and 72) by 12 to get 5 and 6. Thus, Miss Smith made 12 packages with 5 notebooks and 6 pencils in each package.
Answer:
12 packages with 5 notebooks and 6 pencils in each package.
Step-by-step explanation:
What do I do next please help
Answer:
0
Step-by-step explanation:
y = 1/2x + c
Put x as 1, and y as 1/2.
1/2 = 1/2(1) + c
1/2 - 1/2 = c
0 = c
Answer:
The answer would be 0.
Step-by-step explanation:
This is the slope formula. y=mx+b in which b equals the y-intercept, and considering the pattern going on in the graph, when y is 0, so will the x be.
A item in a shop is increased in price by 20% and then decreased in price by 20% a month later.
Is there an overall increase or
decrease in price and by how
much?
please give the method too
Answer:
Decrease of 4% ($4).
Step-by-step explanation:
Suppose the initial price was $100. An increase of 20% will make the price $120.
Now we decrease it 20% which brings it to 120 - 0.20 * 120
= 120 - 24
= $96.
So that's an overall decrease of $4 or 4%.
Solve for x. − 6 ≥ 10 − 8x.
Answer:
2</x or x>/2
Step-by-step explanation:
-6>/10-8x
-10 -10
-16>/-8x
divide both sides by -8
2</x or x>/2
the reason the sign is bc u r dividing by a - number.
Answer:
x ≥ 2
Step-by-step explanation:
-6 ≥ 10 - 8x
Subtract 10 on both parts.
-6 - 10 ≥ 10 - 8x - 10
-16 ≥ -8x
Divide both parts by -8 remembering to reverse sign.
-16/-8 ≤ (-8x)/-8
2 ≤ x
Switch parts.
x ≥ 2
Find the pattern and fill in the missing numbers: 0, …, 9, 18, 30, 45, ...
it is 9
and it is also 54
Answer:
3 and 63.
Step-by-step explanation:
The sequence formula is [tex]\frac{3n(n+1)}{2}[/tex].
Resulting in a sequence of 0, 3, 9, 18, 30, 45, 63.
Solve the equation 2q – 4 = 26 for q.
Answer:
q = 15
Step-by-step explanation:
2q – 4 = 26 (add 4 to both sides)
2q = 26 + 4
2q = 30 (divide both sides by 2)
q = 30/2
q = 15