Answer:
21
[tex] \frac{1}{3} s = 7 \\ s = 7 \times 3 \\ s = 21[/tex]
Có bao nhiêu hàm đơn ánh từ tập $\{a,b,c\}$ đến tập $\{1,2,3,4,5\}$?
A function f : X → Y assigns only one value of y ∈ Y to any given x ∈ X.
For each of the three elements in {a, b, c}, there are 5 choices of values to assign from {1, 2, 3, 4, 5}, so there are 5³ = 125 possible functions.
Nadia needs 3/4 cup of orange juice for a punch recipe. She will double the recipe to make
punch for a party. Which statement is true?
Answer:
she will be using more orange juice
Answer:
she will be using more orange juice
prove that:cos^2(45+A)+cos (45-A)=1
Step-by-step explanation:
[tex] \boxed{cos^2x=\frac{1-cos2x}{2}}\\cos^2(45+A)+cos^2(45-A)=\frac{1-cos2(45+A)}{2}+\frac{1-cos2(45-A}{2}\\=\frac{1 - cos(90 +2A) }{2} + \frac{1 - cos(90 - 2A) }{2} \\ = \frac{2- ( - sin 2A) - sin2A}{2} \\ = \frac{2 + sin2A -sin2A }{2} \\ = \frac{2}{2} \\ = 1[/tex]
Step-by-step explanation:
Prove that
[tex]\cos^2(45+A)+\cos^2(45-A) =1[/tex]
We know that
[tex]\cos (\alpha \pm \beta) = \cos \alpha\cos \beta \mp \sin \alpha \sin\ beta)[/tex]
We can then write
[tex]\cos (45+A)=\cos 45\cos A - \sin 45\sin A[/tex]
[tex]\:\:\:\:\:\:\:\:= \frac{\sqrt{2}}{2}(\cos A - \sin A)[/tex]
Taking the square of the above expression, we get
[tex]\cos^2(45+A) = \frac{1}{2}(\cos^2A - 2\sin A \cos A + \sin^2A)[/tex]
[tex]= \frac{1}{2}(1 - 2\sin A\cos A)\:\:\;\:\:\:\:(1)[/tex]
Similarly, we can write
[tex]\cos^2(45-A) =\frac{1}{2}(1 + 2\sin A\cos A)\:\:\;\:\:\:\:(2)[/tex]
Combining (1) and (2), we get
[tex]\cos^2(45+A)+\cos^2(45-A)[/tex]
[tex]= \frac{1}{2}(1 - 2\sin A\cos A) + \frac{1}{2}(1 + 2\sin A\cos A)[/tex]
[tex]= 1[/tex]
Suppose C1 and C2 are physically the same curve, but they are
parameterized so that the starting point of C1 is the ending point of C2, and
the ending point of C1 is the starting point of C2.
Express
∫ C1m(x, y)D „ x + n(x, y)D „ y
in terms of
∫ C2m(x, y)D „ x + n(x, y)D „ y.
∫ C1m(x, y)D ‚x + n(x, y)D ‚y = -∫ C2 m(x, y)D ‚x + n(x, y)D ‚y.
odd number more than 100 are empty,unit,finite,or,infinite
odd numbers more than 100 are infinite.
Write the equation of a line in slope-intercept form that has a slope of 3/4 and passes through the point (-4, 1).
y equals 0.75 x plus 4
y equals 4 x plus 0.75
y equals minus 4 x plus 1
y equals 0.75 x plus 1
Answer:
y = 3/4 x + 4
y equals 0.75 x plus 4
Step-by-step explanation:
y = 3/4 x + b
1 = 3/4 (-4) + b
1 = -3 + b
b = 4
Answer:
A) y equals 0.75 x plus 4Step-by-step explanation:
Another way to solve this to use the point-slope form:
y - y₁ = m(x - x₁)Substitute the values of m, x₁, y₁ and convert this into slope-intercept form:
y - 1 = 3/4(x - (-4))y - 1 = 3/4x + 3y = 3/4x + 4y = 0.75x + 4Correct choice is A
How many different license plates are possible if each contains 4 letters (out of the alphabet's 26 letters) followed by 2 digits (from 0 to 9)? How many of these license plates contain no repeated letters and no repeated digits? There aredifferent possible license plates. (Simplify your answer.) There are different possible license plates if no letters or numbers are repeated. (Simplify your answer.)
Answer:
There are 45,697,600 different possible license plates. If no letters or numbers are repeated, there are 32,292,000 possible license plates.
Step-by-step explanation:
For the first question, we can repeat letters and digits.
Let [tex]\ell[/tex] represent a letter and [tex]#[/tex][tex]\#[/tex] represent a digit. The license plate format given is:
[tex]\underline{\ell}\:\:\underline{\ell}\:\:\underline{\ell}\:\:\underline{\ell}\:\:\underline{n}\:\:{\underline {n}[/tex]
For each letter, there are 26 letters to choose from (alphabet). For each digit, there are 10 numbers to choose from (0-9).
Since we're choosing 4 letters and 2 numbers, the number of possible license plates is:
[tex]26\cdot 26\cdot 26\cdot 26\cdot 10\cdot 10=\boxed{45,697,600}[/tex]
If we stipulate that no letter or digit may be repeated, then we'll still have 26 choices for the first letter, but for the second letter, we'll only have 25. Then 24, 23, and so on. Similarly, for the first digit, there will be 10 choices, then 9, 8, and so on.
Therefore, the desired answer for the second part of the question is:
[tex]26\cdot 25\cdot 24\cdot 23\cdot 10\cdot 9=\boxed{32,292,000}[/tex]
*Note that we don't need to account for rearrangements as [tex]HOCL67[/tex] and [tex]CLHO76[/tex] are considered different license plates (order matters).
Jim took a loan of R30 000 for 18 months at simple interest rate of 12,5% per year. determine the amount that Jim will pay in 18 months
Answer:
36151,82923
Step-by-step explanation:
30000* ( 1+12,5%/12)^18
The director of special events for Sun City believed that the amount of money spent on fireworks displays on the 4th of July was predictive of attendance at the Fall Festival held in October. She gathered the following data to test her suspicion.
4th of July ($000) Fall Festival (000)
10.6 8.8
8.5 6.4
12.5 10.8
9.0 10.2
5.5 6.0
12 11.1
8.0 7.5
7.5 8.4
9.0 9.5
10 9.8
7.5 6.6
10 10.1
6.0 6.1
12 11.3
10.5 8.8
Required:
Determine the regression equation. Is the amount spent on fireworks related to attendance at the Fall Festival? Conduct a hypothesis test to determine if there is a problem with autocorrelation.
Answer:
The complete question and its solution in the attached file please find it.
Step-by-step explanation:
Use the substitution method to solve the system of equations below.
y = 3x − 2x + 8y = −22
On a piece of paper graph y ≤ - 2x. Then determine which answer matches the graph you drew ?
Answer:
hope it helps
Step-by-step explanation:
The given inequality is
The sign of inequality is ≤, it means the points on relation line lie in the solution set.
The related equation of the inequality is
At x=0,
At x=1,
Plot the points (0,0) and (1,-2) on a coordinate plane.
The sign of inequality is ≤, it means we have shade below the line.
The point (-2,4) and (3,-6) are in solution set because,
(True)
(True)
Therefore option A is correct.
The points (1,2) and (1,3) are not in the solution set because,
(False)
(False)
The correct answer for the inequality is,
⇒ (-2, 4) (3,- 6)
What is Inequality?A relation by which we can compare two or more mathematical expression is called an inequality.
Given that;
The inequality is,
⇒ y ≤ - 2x
Now, We can find the solution of the inequality as;
We know that;
The points are satisfy the inequality are called solution of the inequality.
Hence, By option A;
Points are,
(-2, 4) and (3,- 6)
Put x = - 2, y = 4;
⇒ y ≤ - 2x
⇒ 4 ≤ - 2 x - 2
⇒ 4 ≤ 4
Which is true.
Put x = 3, y = - 6;
⇒ y ≤ - 2x
⇒ -6 ≤ - 2 x 3
⇒ - 6 ≤ - 6
Which is true.
Hence, The correct answer for the inequality is,
⇒ (-2, 4) (3,- 6)
Learn more about the inequality visit:
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Complete question is,
On a piece of paper, graph y≤ -2x.Then determine which answer matches the graph you drew.
A.(-2,4) (3,-6)
B.(-2,4) (1,2)
C.(-2,-6) (1,3)
D.(-2,-6) (1,3)
Use the quadratic formula to find the solutions to the quadratic equation below. Check all that apply. 4x2-x-5 = 0
a.-1
b.-4/5
c.2/3
d.1
e.5/4
f.3/2
Answer:
a. -1
e. 5/4
Step-by-step explanation:
Hi there!
The quadratic formula: [tex]x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}[/tex] where the given quadratic is in the form [tex]ax^2+bx+c=0[/tex]
From the given equation [tex]4x^2-x-5 = 0[/tex], we can identify the values of a, b, and c:
a=4
b=-1
c=-5
Plug these values into the quadratic formula:
[tex]x=\frac{-(-1)\pm\sqrt{(-1)^2-4(4)(-5)}}{2(4)}\\x=\frac{1\pm\sqrt{81}}{8}[/tex]
[tex]x=\frac{1\pm9}{8}[/tex]
[tex]x=\frac{1+9}{8}= \frac{5}{4} \\x=\frac{1-9}{8} = -1[/tex]
Therefore, the solutions to the quadratic are 5/4 or 1.
I hope this helps!
How do I solve this
4 - 2 3/9 =
Answer:
1 2/3.
Step-by-step explanation:
4 - 2 3/9
= 4 - 2 1/3
= 4 - 7/3
= 12/3 - 7/3
= 5/3
= 1 2/3
Solve for x
-5(3-4x) = -6+20x - 9
Answer:
(negative infinity, positive infinity)
Any value of x makes the equation true.
Step-by-step explanation:
-5(3-4x) = -6+20x - 9
-15 + 20x = -15 + 20x
(negative infinity, positive infinity)
Answer:
True for all x
Step-by-step explanation:
-5(3-4x) = -6+20x - 9
Distribute
-15 +20x = -6+20x - 9
Combine like terms
-15 +20x = -15+20x
Subtract 20x from each side
-15 +20x-20x = -15+20x -20x
-15 =-15
This is true for all x
Th
Which number can be written on the line to make the inequality true?
3.91 < ___ < 4.23 < 4.44
a) 3.7
b) 3.9
c) 4.1
d) 4.3
Answer:
[tex]3.7[/tex]
Step-by-step explanation:
[tex]3.9 < 3.7[/tex]
Answer:
answer is A
3.7
Step-by-step explanation:
Identify which of the following is not equivalent to 234.
Question 1 options:
A)
B)
23−−√4
C)
(214)12
D)
214 x 212
Answer:
A since A is left blank its A
I need help with this
Answer:
A.
Step-by-step explanation:
Twust me n' dwont doubt me
A is for apple
And cause A looks like ABC
DWUHHH
The odometer on your car shows the total number of miles traveled up to 99,999 miles, after it turns over it starts over at 0. If the odometer shows, 98,654 miles, what will it show after a trip of 3782?
Answer:
2437miles
Step-by-step explanation:
amount left before it starts over = 999999-98654 = 1354
amount it will show = 3782-1354 = 2437
The odometer will show 2437 miles after 3782 miles if the odometer on your car shows the total number of miles traveled up to 99,999 miles, after it turns over it starts over at 0.
What is the distance?Distance is a numerical representation of the distance between two items or locations. Distance refers to a physical length or an approximation based on other physics or common usage considerations.
We have:
The odometer on your car shows the total number of miles traveled up to 99,999 miles.
Current reading = 98,654 miles
After 99,999 miles the odometer turns over it and starts over at 0
The differnece = 99999 - 98654 = 1354
After 1354 miles odometer turns over and starts over at 0
Now, take the difference between 3782 and 1354
= 3782 - 1354
= 2437 miles
After 3782 miles the meter will show 2437 miles
Thus, the odometer will show 2437 miles after 3782 miles if the odometer on your car shows the total number of miles traveled up to 99,999 miles, after it turns over it starts over at 0.
Learn more about the distance here:
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which polynomial represents the difference below?
Answer:
c. -[tex]x^{2}[/tex] + 8x + 6
Step-by-step explanation:
2[tex]x^{2}[/tex] + 7x + 6 - (3[tex]x^{2}[/tex] - x)
2[tex]x^{2}[/tex] + 7x + 6 - 3[tex]x^{2}[/tex] + x (Distributed the negative to terms inside parentheses)
-[tex]x^{2}[/tex] + 8x +6 (Combine like terms)
Hope one can assist me!
I will rate you five star if answer is right with step by step explanation.
Answer:
WZY=170°
XYZ=60°
Step-by-step explanation:
Straight line, so WZY=180-10=170
Angles in a quadrilateral add to 360°, so:
100+30+170=300
360-300=60
XYZ=60°
Answer:
170° and 52°
Step-by-step explanation:
∠ WZY and ∠ YZA are adjacent angles and sum to 180° , that is
∠ WZY + 10° = 180° ( subtract 10° from both sides )
∠ WZY = 170°
The sum of the angles in a quadrilateral = 360°
sum the angles and equate to 360
∠ XYZ + 170° + 38° + 100° = 360°
∠ XYZ + 308° = 360° ( subtract 308° from both sides )
∠ XYZ = 52°
Ms.Griffin has a class of 18 students. She can spend $19 on each student to buy math supplies for each year. She first buys all of her students calculators, which costs a total of 88.02. After buying the calculators, how much does she have left to spend on each student
I need help with this
Answer:
D.
Step-by-step explanation:
According to converse of the Pythagorean Theorem, that if the square of the third side (longest side) of a triangle equals the sum of the other two shorter sides, therefore, the triangle formed must be a right triangle.
From the side lengths given, the following satisfies the Pythagorean triple:
5² + 12² = 13².
Therefore, the procedure to use to confirm the converse of the Pythagorean Theorem would be to draw the two shortest side, 5 cm and 12 cm, so that a right angle will be between them. The side measuring 13 cm should therefore fit in to form a right triangle.
the answer plz no explanation needed
Answer:
The power is 4
Step-by-step explanation:
2401 = 7 ^ (6-2x)
rewriting 2401 as 7^4
7^4 = 7 ^ (6-2x)
Answer:
7 to the power of 4
Step-by-step explanation:
7 x 7 x 7 x 7 = 2401
or 7^4
Which graph represents y = |xl?
A
B
C
D
Answer:
B
Step-by-step explanation:
The equation represented in the question is the parent absolute value question. If you know the different parent functions, then the answer is obvious because absolute value equations always form a V. However, if you do not do this then you can create a table and plugin values. Plugin numbers like 0, -1, and 1 for X and solve for Y. Finally, graph these points and see what graph best fits. If needed you can also plug in more points.
Answer:
B.
Step-by-step explanation:
I got it correct on the warm up
Find the following images in width and circumference
Step-by-step explanation:
hey guys how do you put a picture like you did ?
A popular pain-relieving drug has 100mg of its active ingredient in one capsule. If a bottle has 100 capsules, how many grams of the active ingredient are in the bottle
Answer:
1000
Step-by-step explanation:
I WILL MARK BRAINLIEST I PROMISE!!!!!(PICTURE OF GRAPH INCLUDE) (07.06 Which of the following inequalities best represents the graph above? X < 9 , X > 9 , X ≤ 9 , X ≥ 9 ,
Answer:
it is.........
Step-by-step explanation:
x<9 it is a open circle and it is pointing < that way
AdD my 1n5ta at jewcrispy999
construct an angle that bisect 120°
Answer:
just make a 120 angle and divide it by 2, 60.
write your answer in simplest radical form
Solve this equation for x. Round your answer to the nearest hundredth. 0.77 = log x
Answer:
x ≈ 5.89
General Formulas and Concepts:
Pre-Algebra
Equality PropertiesAlgebra II
Exponential to Logarithmic: [tex]\displaystyle b^m=x \rightarrow log_bx=m[/tex]Step-by-step explanation:
Step 1: Define
Identify
0.77 = log(x)
Step 2: Solve for x
[Equality Property] Raise both sides to the 10th power: [tex]\displaysytle 10^{0.77} = 10^{logx}[/tex]Simplify: [tex]\displaysytle x = 10^{0.77}[/tex]Evaluate: [tex]\displaysytle x = 5.88844[/tex]