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(MATH AND CHEMISTRY RELATED)

Let x and y be the number of hours Ryan works on each job respectively. He can work no more that 10 hours a week, it means that the sum of x and y must be less than or equal to 10:

He also need to earn at least $72 a week, which means that the sum of 9 times x and 18 times y must be greater than or equal to 72:

The system of inequalities is:

To graph these inequalities, we have to graph the boundary lines which are x+y=10 and 9x+18y=72, and then shade the region depending on the inequality. For the first inequality which is a less than or equal to, the shaded region must be under the boundary line (which is a continuous line) and for the second one, the shaded region must be above the boundary line (which is also continous).

In this case we only can take the solutions that have positive values of x and y, since Ryan can't work a negative number of hours. For example, one combination that will allow Ryan reach his goal is 5 hours as babysitter and 5 hours at the coffee shop.

The probability of winning the lottery is 6.16*10^(-7).

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The correct option is d. No extrema, is obtained for the given function.

For the state question,

The function is defined as; f(x) = 2/(3x-5).

To estimated the extrema of the function, first find the critical points.

Differentiate the function with respect to x suing division rule.

f(x) = 2/(3x-5).

f'(x) = 3/(3x-5)²

Now, put the function equals to zero.

f'(x) = 3/(3x-5)² = 0.

3 = 0

But, 3 ≠ 0

Thus, there is no critical point found for the function.

The give function is independent of the value of the x, and thus called the constant function.

Therefore, there is no extrema obtained for the function.

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Answer:

A = 28

B = 2

C = 29

Step-by-step explanation:

28×2+29 = 85

28+2×29 = 86

The coordinates of RS are R(2, 3) and S(-5, 6)

A rotation is a type of transformation that takes each point in a figure and rotates it a certain number of degrees around a given point.

Given:

Segment RS is rotated 90 counterclockwise about the origin

So, When rotating a point 90 degrees counterclockwise about the origin our point A(x,y) becomes A'(-y,x).

Also, the coordinates are reflected over y- axis.

So, The coordinates of RS before reflection over y- axis is

R(-3, 2) and S(-6, -5)

Now, the coordinates of RS before rotation is

R(2, 3) and S(-5, 6)

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Answer:

|-74| = 74

yw:)

hope it helps

Answer:-7\5 IS THE ANSWER TO THAT

Step-by-step explanation:

Here, we want to evaluate the given equation

Looking at what is given, the operations performed on both sides are different

The reason is because we have addition on one side and division on the other side

By the addition property of equality, we are supposed to have the same operation performed on both sides

Since it is different, then the two are not equal

Answer:

a

2

−

b

2

=

(

a

+

b

)

(

a

−

b

)

where

a

=

7

and

b

=

3

x

.

(

7

+

3

x

)

(

7

−

3

x

)

Step-by-step explanation:

Lenght of a rectangle: L

Widht of the rectangle: W

Perimeter of the rectangle: P

length of a rectangle is four times it's width: L = 4W

Perimeter is at most 106: P <= 106

Perimeter is 2L + 2W: P = 2L + 2W

P <= 106

if we use the value of P = 2L + 2W, we can write:

2L + 2W <= 106

Since L = 4W, then we can write this equation:

2L + 2W <= 106

2(4W) + 2W <= 106

8W + 2W <= 106

10W <= 106

W <= 106/10 = 10.6

W <= 10.6

Therefore, the greatest possible value for the width is 10.6

Answer:

10.6

The equation that can be derived is [tex]4(x-3)=12[/tex]

Given

Four times the difference of some number and 3 amounts to the quotient of 144 and 12.

Let us say some number is x

Quotient of 144 and 12,

Quotient = [tex]\frac{144}{12}[/tex]

Quotient = 12

Four times the difference of x and 3 is as follows

[tex]4(x-3)[/tex]

Writing this in the form of an equation we get

[tex]4(x-3)=12[/tex]

Hence the equation is obtained, also solving the equation for x

[tex]4x-12=12[/tex]

[tex]4x = 24[/tex]

[tex]x=\frac{24}{4}[/tex]

[tex]x=6[/tex]

Hence the equation for given conditions is obtained.

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Answer:

Step-by-step explanation:

Answer:

Second option $0.2

Step-by-step explanation:

First we can convert 3/8 pounds to oz

since 16oz is in 1 pound

so 3/8 pound will be

3/8*16=6 oz

Then to find unit price per oz

we just take the total cost $1.20 divide by 6

$1.20/6=$0.2

The option that is an appropriate procedure for this experiment is D. The doctor needs to randomly assign the 30 patients to the new medication to even out the variability between the patients and to determine if their cholesterol level is lowered.

From the information illustrated, the doctor wants to determine if a new medication for cholesterol is more effective than the previous medication.

In this case, it should be noted that it's important to prevent bias. Therefore, it's important that the doctor randomly assign the 30 patients to the new medication

In conclusion, the correct option is D.

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Answer:

answer is A got it right

Step-by-step explanation:

The correct answer is commutative property of addition.

What is commutative property?

In mathematics, the commutative property states that the sum of the expression does not change by changing the order or position of the numbers. Basically, changing the order does not change the sum.

According to the question, the given equation for the property of identity is as follows: 4 + 5 = 5 + 4

For this equation, the commutative identity property of addition which states that:  a + b = b + a

Therefore, using this property, the given equation can be written as:

4 + 5 = 5 + 4

Hence, the correct answer is commutative property of addition.

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The exponent is 81[tex]m^{} 4[/tex] [tex]n^{20}[/tex]

An exponent is a quantity representing the power to which a given number or expression is to be raised, usually expressed as a raised symbol beside the number or expression.

Here we have to determine the sign for exponential or radical expression

(-3m[tex]n^{5}[/tex])^4

Simplify using the exponent rule with the same exponent [tex](ab)^{n}[/tex] = [tex]a^{n}[/tex] . [tex]b^{n}[/tex]

Similarly

(-3m[tex]n^{5}[/tex])^4

= [tex](-3)^{4}[/tex] . [tex]m^{4}[/tex]. [tex](n^{5} )^{4}[/tex]

Now using the exponent  power rule [tex](a^{n} )^{m}[/tex] = [tex]a^{nm}[/tex]. We get

= 81 . [tex]m^{4}[/tex].[tex]n^{20}[/tex]

Therefore the exponent as a product of power is 81[tex]m^{4} n^{20}[/tex].

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The set of letters in the word 'woodpecker' using the listing (roster) method is {c, d, e, k, o, p, r, w}

From the question, we are to write the set of letters in the given word.

The given word is 'woodpecker'.

We are to write the set using either the listing (roster) method or the set builder notation.

The most concise way of writing the set is by using the listing (roster) method.

The roster method is a way to show the elements of a set by listing the elements inside of bracket.

The set of the letters in the given word is {c, d, e, k, o, p, r, w}

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On an average 9.043 [tex]\times10^{5}[/tex] beats more does the mouse heart beats in a day.

The average human heart beats = 1.037[tex]\times10^5[/tex] times per day.

The approximate average mouse heart beats = 1.008[tex]\times10^6[/tex] times per day.

We have to find the how many beats more does the mouse heart beats in a day.

Since we have to find the more heart beat of mouse comparing to the human heartbeats. So we subtract their heart beat.

The human heartbeats have [tex]10^5[/tex] while mouse heartbeats have [tex]10^6[/tex]. So we first equal the power of 10. After equal the power we can easily find the value of the more heart beat of mouse.

We can write,

The average human heart beats = 0.1037[tex]\times10^6[/tex]

Now,

The more heartbeats of mouse = average mouse heart beats − average human heart beats.

The more heartbeats of mouse [tex]= 1.008\times10^6-0.1037\times10^6[/tex]

The more heartbeats of mouse [tex]=(1.008-0.1037)\times10^{6}[/tex]

The more heartbeats of mouse = 0.9043[tex]\times10^{6}[/tex]

The more heartbeats of mouse = 9.043[tex]\times10^{5}[/tex]

Hence, on an average 9.043[tex]\times10^{5}[/tex] beats more does the mouse heart beats in a day.

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Answer:

9, 9, 9900

Step-by-step explanation:

For every 4 liters of synthetic oil, there are 7 liters of natural oil. 671 liters of Petrolyn oil. 244 liters of synthetic oil is needed and 427 liters of natural oil is needed.

Given that,

Petrolyn motor oil is a blend of synthetic and natural oil. For every 4 liters of synthetic oil, there are 7 liters of natural oil. 671 liters of Petrolyn oil are needed to produce it.

We have to find how much synthetic oil, in liters, is required.

According to the given values;

The ratio of natural to synthetic oil

= 7:4

If 671 liters have to be made then,

By adding 7+4=11

So, 7/11 of 671 liters will be = 427 liters of natural oil

and, 4/11 of 671  liters will be = 244 liters of synthetic oil

Therefore,244 liters of synthetic oil is needed and 427 liters of natural oil is needed.

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Answer:

to solve for x, you gotta make the two equations equal to each other then you can move the numbers to get the value of x

20x+10=30x-10

20x-30x=-10-10

-10x=-20

x=2

Answer:

x=2

Step-by-step explanation:

if m/A and m/B are equal, to find x, your equation would be 20x+10=30x-10. doing two step equations, you would substract 20x from both sides, making your equation look like 10=10x-10. then you would add 10 from both sides making your equation 20=10x. then you would divide 10x from both sides making x=2.

The matrix equation is given to be:

where A is the coefficient matrix of the system.

To get the value of X, we need to multiply both sides of the equation by the inverse of A, since:

Therefore, we have:

he TLAST OPTION is correct.

Answer:

no solution that's my answer

The valid solution to the problem is: The smallest value of all the common fractions that can be formed using the digits 3, 4, 5, and 8 is 34/85.The smallest value of all the common fractions that can be formed using the digits 3, 4, 5, and 8 is 34/85.

Let's solve the problem step by step to determine the smallest value of all the common fractions that can be formed using the digits 3, 4, 5, and 8. We'll express the answer as a reduced fraction.

We have 4 boxes arranged in a square as described:

 A  B

 C  D

The fraction can be represented as AB/CD.

To make the fraction as small as possible, we need to arrange the digits in a specific way. We want to minimize the numerator (AB) and maximize the denominator (CD).

For the numerator (AB), we want the smallest two-digit number. The smallest two-digit number that can be formed using the digits 3, 4, 5, and 8 is 34.

For the denominator (CD), we want the largest two-digit number. The largest two-digit number that can be formed using the digits 3, 4, 5, and 8 is 85.

Therefore, the smallest fraction that can be formed is 34/85.

To ensure that this fraction cannot be further reduced, we need to check if 34 and 85 share any common factors greater than 1. If they do not share any common factors other than 1, then the fraction is in its reduced form.

Checking for common factors:

Factors of 34: 1, 2, 17, 34

Factors of 85: 1, 5, 17, 85

The only common factor is 1, which means the fraction 34/85 is already in its reduced form.

Thus, the valid solution to the problem is:

The smallest value of all the common fractions that can be formed using the digits 3, 4, 5, and 8 is 34/85.

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After evaluating the limit we have came to find that the limit of       [tex]\lim_{x\rightarrow 1 }\frac{x-2}{x^2-10x + 25}[/tex] as x approaches 1 is −0.0625

In mathematics, a limit is the value that a function, sequence, or index approaches as an input or as an index approaches a specific value. Limits are crucial to calculus and mathematical analysis and are necessary for the definitions of continuity, derivatives, and integrals.

The idea of a limit of a sequence is further generalized to include the idea of a limit of a topological network, in addition to sharing a connection with the category theory concepts of limit and direct limit.

A limit of a function is typically expressed in formulas as

[tex]{\displaystyle \lim _{x\to c}f(x)=L,}[/tex]

To find the limit

⇒ [tex]\lim_{x\rightarrow 1 }\frac{x-2}{x^2-10x + 25}[/tex]

Evalúe 2 as x

⇒ [tex]\frac{1-2}{1^2-10(1) + 25}[/tex]

⇒ [tex]\frac{-1}{-9 + 25}[/tex]

⇒ [tex]\frac{-1}{16}[/tex]

⇒−0.0625

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Answer: your welcome

Step-by-step explanation:

Let x = the certain number

"A certain number was tripled                       3x

"then decreased by 10":        3x - 10

"then doubled":           2*(3x-10)

"Then increased by 2":      2(3x-10)+2

"result was 5 times original number":

   2(3x-10)+2 = 5x

   6x - 20 + 2 = 5x

   6x - 5x = 20 - 2

      x = 18

Check (very important):

Is    2*(3*18 - 10) + 2:= 5*18        ?

     2*(54-10) + 2 = 90    ?

      2*(44) + 2 = 90    ?

         90 = 90    ?yes

Answer: $97.5

Step-by-step explanation:

15(4) + 7.5(5) = $97.5

Answer:

97.5

Step-by-step explanation:

got it right

The probability that the subject​ lied, given that the test yields a positive result is; 81.81%

From the given table, we see that;

Number of people with a positive result who did not lie = 10

Number of people with a positive result who lied = 45

Total number of people with positive results = (10 + 45) = 55

Number of people with a negative result who did not lie = 34

Number of people with a negative result who lied = 12

Total number of people with negative results = (34 + 12) = 46

The probability that the subject​ lied, given that the test yields a positive result is;

Probability = 45/55 = 0.818 = 81.81%

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