MATHEMATICS HIGH SCHOOL

What does a semicolon in math mean

Answers

Answer 1
Answer:

The semicolon in math mean [1;2;3].

We are given that;

Semicolon

Now,

A semicolon in math can have different meanings depending on the context. One common use of a semicolon is to separate variables from parameters in a function definition1. For example, f(x;y) means that f is a function of the parameter y that returns a function of the variable x. Another use of a semicolon is to separate the elements of a matrix or a vector2. For example, A = [1;2;3] means that A is a column vector with three elements: 1, 2 and 3. A third use of a semicolon is to indicate a conditional probability3. For example, P(A;B) means the probability of A given B, or the probability of A occurring when B is true.

Therefore, by mean the answer will be [1;2;3].

Learn more about mean and median;

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Answer 2
Answer: A semicolon is used to separate variables from parameters. that we are defining a function of the parameters that returns a function of the variables.

Related Questions

What is the solution of the system? {5x−y=−21 x+y=−3 Enter your answer in the boxes. (( , )
How many grams in an ounce
An arc of a circle measures 80 degrees and the length of 88pie cm. what is the diameter?
Find f (3) of the function: x square - 2x + 1​
Find value 40% of 25 is what number?

1. AQRS ~ ATUV; find x
54
S
R
U
36
의
24.
x+5
T

Answers

Step-by-step explanation:

x+5=36

or, x=36-5

or, x=31

The value of x=31

Kyle asks his friend Jane to guess his age and his grandmother’s age. Kyle says his grandmother is not more than 80 years old. He says his grandmother’s age is, at most, 3 years less than 3 times his own age. Jane writes this system of inequalities to represent k, Kyle’s age, and g, Kyle’s grandmother’s age. Inequality 1: g > 80 Inequality 2: g ≤ 3k – 3 Which inequality did Jane write incorrectly, and how could it be corrected?

Answers

not more tha 80 means
g is less than or equal to 80 or
g<80

grandmothers age is at most, 3 years less than 3 tmes his age
g is equal to or less than 3 years less than 3 times k
g<-3+3k

we have
g<80 and
g<3k-3

the first one is incorerct, it is written as g>80 in the question, but it should be g<80

Answer:

LETTER ANSWERR IS A.

Step-by-step explanation:

Brianna went to Los Angeles for a vacation. She spent 5 nights at a hotel and rented a car for 6 days. Justin stayed at the same hotel, but spent 7 nights and rented a car for 8 days from the same company. If Brianna paid $1170 and Justin paid $1610, how much did one night at the hotel cost?

Answers

$150 per night

Use a system of equations using x (cost of hotel) and y (cost of car): 

5x + 6y = 1170 

7x + 8y = 1610 

Solve for y in one of the equations and then use substitution to solve for x in the other: 

6y = 1170 - 5x 

y = (-5/6)x + 195 

7x + 8((-5/6)x + 195) = 1610 

7x + (-20/3)x + 1560 = 1610 

(1/3)x +1560 = 1610 

(1/3)x = 50 


x = $150 a night

Kate is at a T-shirt sale where she can buy one and get a second one for 30% off. She wants to buy two T-shirts listed at $19 each. How much will she pay?

Answers

So in this problem we can state that each T-shirt costs S19 each. And if Kate buys two she gets a 30% off with the second shirt she buys. And how much will she pay?

Solution:
1.       19 for each t-shirt
2.       Total of $38 if not provided with 30% off
3.       19 x 0.3 = 5.7
4.       Hence 30% of $19 is $5.7
5.       Next is we deduct $5.7 which is 30% of $19.
6.       19 – 5.7 = $13.3
7.       Therefore we add one shirt for $19 and the second, less 30% off which now only costs for $13.3.
8.       19 + 13.3 =  32.3
9.       Conclusively, she will pay $32.3 for the shirts.



One week Beth bought 3 apples and 8 pears for $14.50. The next week she bought 6 apples and 4 pears and paid $14. Find the cost of 2 apple and the cost of 1 pear.

Answers

Let us assume the cost of 1 apple = x dollars
Let us also assume the cost of 1 pear = y dollars
Then we can form two equations from the details given in the question. Based on those details the required answer to the question can be easily deduced.
3x + 8y = 14.50
And
6x + 4y = 14
Dividing both sides of the equation by 2 we get
3x + 2y = 7
2y = 7 - 3x
y = (7 - 3x)/2
Putting the value of y from the second equation in the first equation we get
3x + 8y = 14.50
3x + 8[(7 - 3x)/2] = 14.50
3x + 4 (7 - 3x) = 14.50
3x + 28 - 12x = 14.50
- 9x = 14.50 - 28
- 9x = - 13.5
9x = 13.5
x = 13.5/9
   = 1.5
Putting the value of x in the second equation we get
6x + 4y = 14
(6 * 1.5) + 4y = 14
9 + 4y = 14
4y = 14 - 9
4y = 5
y = 5/4
   = 1.25
So we can find from the above deduction that the cost of 1 apple is 1.5 dollars and the cost of 1 pear is 1.25 dollars
Then
Cost of 2 apples = 2 * 1.5 dollars
                           = 3.0 dollars
So the cost of 2 apples is $3 and the cost of 1 pear is $1.25.

Find the distance between the pair of parallel lines, y = x-11 & y = x-7

Answers

k:\ y = x-11\ \ \ \Leftrightarrow\ \ \ x-y-11=0\n and\n l:\ y = x-7\ \ \ \Leftrightarrow\ \ \ x-y-7=0\n\nthe\ distance:\n\n d(k;l)= \frac{\big{|-11-(-7)|}}{\big{ √(1^2+1^2) }} =\frac{\big{|-11+7|}}{\big{ √(2) }} =\frac{\big{|-4|}}{\big{ √(2) }} =\frac{\big{4\cdot √(2) }}{\big{ √(2)\cdot √(2) }} =\frac{\big{4 √(2) }}{\big{2 }} =2 √(2)
Given \ the \ equations \ of \ two \ non-vertical \ parallel \ lines:\n\ny = mx+b_1\ny = mx+b_2\n\nthe \ distance \ between \ them \ can \ be \ expressed \ as : \n\nd= (|b_(1)-b_(2)|)/( √( m^2+1) )

y = x-11 \n y = x-7 \n\n\nd= (| -11- (-7)|)/( √( 1^2+1) ) =(| -11+7|)/( √( 1+1) ) = (|-4|)/( √(2) ) = (4)/( √(2) )\cdot (√(2))/(√(2))=(4√(2))/(2)=2√(2)
 
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