It’s going to be Lindsay’s birthday soon and her 5 friends Mary Jacqui Tadeusz opal and Tony have contributed equal amounts of money to buy her a present. They have $45.00 to spend between them. Determine how much each contributed
A. 5y = $45.00; y = $9.00
B. 5y = $45.00; y = $10.00
C. 5 + y = $45.00; y = $39.00
D. 5 + y = $45.00; y = $40.00

To use the annihilator method, we first find the characteristic equation of the homogeneous equation: r^2 - 5r + 6 = 0, which factors as (r-2)(r-3) = 0. So the homogeneous solution is u_h(x) = c1*e^(2x) + c2*e^(3x).

Next, we get the annihilator of the term cos(2x) in the nonhomogeneous equation. Since cos(2x) is a solution to the homogeneous equation u''-5u'+6u=0, we need to use the second order operator (D^2 - 5D + 6) on our particular solution. This gives us:
(D^2 - 5D + 6)(A cos(2x) + B sin(2x)) = (-4A + 10B) cos(2x) + (-10A - 4B) sin(2x)
Setting this equal to cos(2x), we get the system of equations:
-4A + 10B = 1
-10A - 4B = 0
Solving for A and B, we get A = -1/26 and B = -5/26. So our particular solution is:
u_p(x) = (-1/26)cos(2x) - (5/26)sin(2x)
And the general solution to the nonhomogeneous equation is:
u(x) = u_h(x) + u_p(x) = c1*e^(2x) + c2*e^(3x) - (1/26)cos(2x) - (5/26)sin(2x)

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To use the annihilator method, we first find the characteristic equation of the homogeneous equation: r^2 - 5r + 6 = 0, which factors as (r-2)(r-3) = 0. So the homogeneous solution is u_h(x) = c1*e^(2x) + c2*e^(3x).

Next, we get the annihilator of the term cos(2x) in the nonhomogeneous equation. Since cos(2x) is a solution to the homogeneous equation u''-5u'+6u=0, we need to use the second order operator (D^2 - 5D + 6) on our particular solution. This gives us:
(D^2 - 5D + 6)(A cos(2x) + B sin(2x)) = (-4A + 10B) cos(2x) + (-10A - 4B) sin(2x)
Setting this equal to cos(2x), we get the system of equations:
-4A + 10B = 1
-10A - 4B = 0
Solving for A and B, we get A = -1/26 and B = -5/26. So our particular solution is:
u_p(x) = (-1/26)cos(2x) - (5/26)sin(2x)
And the general solution to the nonhomogeneous equation is:
u(x) = u_h(x) + u_p(x) = c1*e^(2x) + c2*e^(3x) - (1/26)cos(2x) - (5/26)sin(2x)

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Simple integer arithmetic expressions with addition and multiplication cannot be represented by a context-free grammar due to their recursive and hierarchical nature.

Context-free grammars (CFGs) are formal grammars that can be used to generate languages based on a set of production rules. However, CFGs are limited in their ability to represent certain types of languages. One such limitation is the inability to represent the recursive and hierarchical structure of simple integer arithmetic expressions involving addition and multiplication.

In simple integer arithmetic expressions, operands can be combined using addition and multiplication operators. These expressions can be nested, with subexpressions appearing within larger expressions. The recursive nature of these expressions poses a challenge for CFGs because they require an unbounded number of production rules to capture all possible levels of nesting.

CFGs are designed to handle languages with a linear structure, where the order of symbols is important but not their hierarchical relationships. While CFGs can handle addition or multiplication operations individually, they struggle to capture the nested structure and precedence rules inherent in arithmetic expressions.

To represent simple integer arithmetic expressions with addition and multiplication, more powerful formalisms such as context-sensitive grammars or parsing algorithms like recursive descent or operator precedence parsing are typically used. These approaches can handle the recursive and hierarchical nature of arithmetic expressions, allowing for the correct interpretation of operators and operands based on their precedence and associativity.

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The complete question is :

why simple integer arithmetic expressions with addition and multiplication cannot be represented by a context-free grammar?

In 2000 Emily was 9 years old.

Given that in the year 2015 Emily was three times as old as Kaitlin while by the year 2021 Kaitlin will be half as old as Emily will be, to determine how old was Emily on the year 2000 the following calculation must be performed:

Therefore, in 2000 Emily was 9 years old.

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Answer:

7

Step-by-step explanation:

5 plus 1 plus 1 =7

Answer:

y=7x-22

Step-by-step explanation:

-1=7(3)-22

-1=21-22

-1=-1

Done!

The concept of greatest common factor is used to solve this question. Then, we use it to find the number of crackers and slices of cheese, and the answer is:

--------------------------------

To find the greatest number of plates, you need to find the greatest common factor between 12 and 18.

Thus, factoring them, always by the same number:

12 - 18|2

6 - 9|3

2 - 3

The greatest common factor is 2x3 = 6, which means that the greatest number of plates you can prepare is 6.

--------------------------------

18 crackers, so each plate has 18/6 = 3 crackers.

12 slices of cheese, so each plate has 12/6 = 2 slices of cheese.

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Answer:

Option A is the correct

Step-by-step explanation:

a=d+c/b

Now we have to solve for d

Multiplying b on both sides

a*b=d+c/b*b

ab=d+c

ab-c=d

I hope this will help you:)

Randy should begin his homework by 07:10 in order to sleep by 10:00

The given parameters are:

If the above activities are done, the time spent would be:

Time = 45 minutes + 40 minutes + 1 hour and 15 minutes + 10 minutes

Add the time

Time =  2 hour and 50 minutes

He wants to go to bed by 10:00.

So, the time to begin his homework is:

Begin = 10:00 - 2 hour and 50 minutes

Evaluate the difference

Begin = 07:10

Hence, Randy should begin his homework by 07:10

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Answer:

5.1, 5 1/10

Step-by-step explanation:

(3.5 − 2/3) ⋅ (−2.8 + 4 3/5) =

= (7/2 - 2/3)(-14/5 + 23/5)

= (21/6 - 4/6)(9/5)

= (17/6)(9/5)

= (17 × 9)/(6 × 5)

= 51/10

= 5.1 = 5 1/10

Answer:

2) 11

3) 21

4) 7

Step-by-step explanation:

2) (-6) -(-17) = 17 - 6 = 11

3) 19 - (-2) = 19 + 2 = 21

4) (-13) + 20 = 20 - 13 = 7

The correct ordering, assuming x is positive, is III: 2x < x² < 2 < 1/x²< 1.

Let's evaluate each option one by one:

I. x² < 2x < 1/x² < 2 < 1

If x is positive, x² will always be greater than 1/x². Therefore, this ordering is not possible.

II. x² < 1/x² < 2x < 1 < 2

Similarly, x² will always be greater than 1/x². Therefore, this ordering is also not possible.

III. 2x < x² < 2 < 1/x² < 1

For this ordering to be true, we need to confirm that 2x is indeed less than x². Since x is positive, we can divide both sides of the inequality by x to preserve the inequality direction. This gives us 2 < x. As long as x is greater than 2, this ordering holds true. Therefore, the correct ordering, assuming x is positive, is III: 2x < x² < 2 < 1/x²< 1.

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The probability of choosing sausage and onion by Rosa's mom from the given 8 different toppings as per given condition is equal to

(1/ ⁸C₂).

As given in the question,

Total number of different toppings = 8

Number of different toppings choose by Rosa's mom randomly = 2

Possibility of choosing sausage and onion (any one) = 1

Total number of outcomes = ⁸C₂

Number of favorable outcomes = 1

Probability of choosing sausage and onion ( exactly ) one topping

= ( Number of favorable outcomes ) / ( Total number of outcomes )

= ( 1/⁸C₂ )

Therefore, the probability when Rosa's mom chooses sausage and onion out of 8 toppings is equal to ( 1/⁸C₂ ).

The above question is incomplete, the complete question is:

A pizza restaurant is offering a special price on pizzas with 2 toppings. They offer the toppings

below:

Pepperoni ,Sausage, Chicken ,  Green pepper , Mushroom ,Pineapple, Ham, Onion

Suppose that Rosa's favorite is sausage and onion, but her mom can't remember that, and she is going to randomly choose 2 different toppings.

What is the probability that Rosa's mom chooses sausage and onion?

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Answer:

1/8c^2

Step-by-step explanation:

Khan Acadmey

Answer:

-540

Step-by-step explanation:

(-15)(-12)(-3)=-36*15=-540

Answer:

-540

Step-by-step explanation:

We can plot these points on the graph and draw a straight line passing through them to represent the line 3y-4x=12.

What is graph ?

Graphs are visual representations of data or mathematical functions that are used to help people understand and analyze the relationships between different variables. Graphs can be used to show patterns, trends, and relationships in data that might be difficult to see from a table or list of numbers.

To draw the line 3y-4x=12 on the graph, we can solve for y and plot several points for different values of x, then connect the points with a straight line.

When x = -3:

3y - 4(-3) = 12

3y + 12 = 12

3y = 0

y = 0

So one point on the line is (-3, 0).

When x = 0:

3y - 4(0) = 12

3y = 12

y = 4

So another point on the line is (0, 4).

We can plot these points on the graph and draw a straight line passing through them to represent the line 3y-4x=12. The graph should look like this:

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Therefore , the solution of the given problem of percentage comes out to be 32 liters after 60% increased.

Any value that may be expressed as a fraction of 100 is referred to as a percentage in mathematics. The acronyms "pct.," "pct," or "pc" are also occasionally used. However, the "%" symbol is typically used to denote it. The proportional amount has no dimensions and is flat. Percentages can be viewed as fractions because their numerator is 100. To indicate that a number is a percent, it needs to be followed by the percent symbol (%).

Here,

Given:

=> 20 liters is the given volume

It is increased by 60% ,

then the final volume is :

=> 20 + 60/100 *20

=> 20 + 0.6*20

=> 20 + 12

=> 32 liters

Therefore , the solution of the given problem of percentage comes out to be 32 liters after 60% increased.

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The total cost  of he meat with tax and tip is $ 22.42

To calculate the total cost with tax and tip, we need to follow these steps:

multiply the meal cost by the tip rate. when  the tip rate is 18%, we have:

Tip amount = $19.00 * 0.18 = $3.42

Add the meal cost, sales tax, and tip amount to get the total cost:

Total cost = Meal cost + Sales tax + Tip amount

= $19.00 + $3.42

= $ 22.42

Therefore, the total cost with tax and tip is $22.42

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The predicate in the conditional statement checks whether the value of variable "a" is less than or equal to 1. However, it does not directly determine if "a" is of type double.

In this specific case, let's break down the code:

1. The expression `(2 + 1) / 2` is evaluated first. Since both 2 and 1 are integers, the division operation `/` results in a floating-point value, specifically 1.5.

2. The result of the expression is then assigned to variable "a" with the statement `a = (2 + 1) / 2`. The value of "a" becomes 1.5.

3. The conditional statement `if (a <= 1)` is evaluated. The comparison `1.5 <= 1` is false because 1.5 is greater than 1.

Therefore, the predicate result for the variable "a" to be a double primitive type in this case is false.

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Answer:

There are 18 choices for first place, 17 for second, and 16 for third.

Therefore, there are 18 x 17 x 16=4896

So there are 4,896 ways possible

Step-by-step explanation:

Hope this helps:)...if not then sorry for wasting your time and may God bless you:)

The given statement (A-B) ∩ (C-B) = A - (B ∪ C) is False , and the counter example is given below .

In the question ,

it is given that ,

(A-B) ∩ (C-B) = A - (B ∪ C)  ,

we use Boolean algebra to prove it ,

Solving LHS first ,

= (A-B) ∩ (C-B)

= A ∩ B' ∩ C ∩ B'          .....because (A - B) = A ∩ B'

= A ∩ B' ∩ C                  ..... because B' ∩ B' = B'

Solving RHS ,

we get ,

= A - (B ∪ C)

= A ∩ (B ∪ C)'            ....because (A - B) = A ∩ B'  ,

= A ∩ (B' ∩ C')            .....by DE Morgan's Law

= A ∩ B' ∩ C'

we see that , LHS ≠ RHS ,

So , the statement is False .

The counter Example is ,

Let A = { 1, 2, 3} , B = { 1, 2, 4} , C = { 2, 4, 5}

LHS is = (A - B) ∩ (C - B)

Putting the values,

LHS = { 3 } ∩ { 5 } = ∅

and  RHS = A - (B υ C)

Putting  the  values,

RHS = { 1, 2, 3} - { 1, 2, 4, 5}

= { 3 }

So , LHS ≠ RHS

Therefore , we have proved that the given statement is false using a counter example .

The given question is incomplete , the complete question is

Prove that each statement is true and find a counterexample for each statement that is false. assume all sets are subsets of universal set u .

For all sets A,B,C,

(A-B) ∩ (C-B) = A - (B ∪ C)

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The amount of rain the city received in July is r = 2.5 inches

Given data ,

City received 3/4 inch of rain on July 31

Now , it represents 3/10 of the total amount of rain this to received in July

So , the equation is represented as A

Now , the value of A is

( 3/10 )r = 3/4

Multiply by 10 on both sides , we get

3r = 30/4

Divide by 3 on both sides , we get

r = 30/12

r = 2.5 inches

Hence , the city received 2.5 inches of rain

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The translation is T(-5, 5), and the image of (-9, 9) after the translation is (-14, 14)

We know that a translation T(a,b) acts on a point (x, y) as:

T(a, b)(x, y) = (x + a, b + y)

Here the translation is T(a, b), and we know that the image of the point (4, -2) under that translation is (-1, 3).

(4 + a, -2 + b) = (-1, 3)

then:

4 + a = -1  ----> a = -5

-2 + b = 3 -----> b = 5

So the translation is T(-5, 5)

And the image of the point (-9, 9) is:

T(-5, 5)(-9, 9) = (-5 - 9, 9 + 5) = (-14, 14)

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Answer:

Well according to the graph it took Elena 6 weeks to pay her brother back

Step-by-step explanation:

Well the slope is -3, techincially she’s giving back 3 dollars every week, it starts from 18 dollars borrowed.

3 dollars every week until 18 dollars is 6 weeks. Plus the graph shows that the line reaches 0 when it crosses the “6” in weeks

Answer:

This can lead to cyclical patterns of predator and prey abundance, where prey increase in number and then, with abundant food, predator number increases ...

Step-by-step explanation:

The probability of getting three heads when tossing three coins is 1/2 x 1/2 x 1/2 = 1/8.

1/8

The probability of getting a head or a tail when flipping a coin is 1/2.  

Therefore, the probability of getting two heads when tossing two coins is 1/2 x 1/2 = 1/4.

The probability of getting three heads when tossing three coins is 1/2 x 1/2 x 1/2 = 1/8.

Since each person is tossing three coins, the probability that they both obtain the same number of heads is 1/8.

The probability of getting n heads when tossing n coins is 1/2^n. Therefore, the probability of getting the same number of heads when two people toss n coins is 1/2^n. This means that if two people each toss a coin, the probability that they both get heads is 1/4; if they each toss two coins, the probability that they both get two heads is 1/16; if they each toss three coins, the probability that they both get three heads is 1/64; and so on.

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Answer:

78.54

Step-by-step explanation:

Area of a circle = pi time radius power of 2

A = pi*r^2

A = 3.14 * 5^2

A = 3.14 * 25

A = 78.54

Answer:

12/35

Step-by-step explanation:

Given the expression;

-4/5(3/5)(-6/7)(5/6)

First multiply the first two brackets

-4/5×3/5

= -12/25

Multiply the last expression in its lowest term

= -6/7×5/6

= -30/42

= -15/21

= -5/7

Multiply the resulting expressions together

= -12/25×-5/7

= -12/5×-1/7

= 12/35

Hence the beat estimate for the actual product is 12/35

Answer:

B

Step-by-step explanation:

Took the test ;)