please help me on this math question

Answer:

If a polygon has not got four right angles then it is not a square.

Step-by-step explanation:

Contrapositive is

if A implies B then not B implies not A.

If you don't specify any restrinction on that number, there actally are infinitely many: real number are dense, which means that you can always find infinitely many numbers between any pair of real numbers, no matter how close.

The width is 42 inches. If you add 42+42+30+30, it equals 144. (l+l+w+w)

Answer:

30 inches

Step-by-step explanation:

To correctly evaluate this we have to give algebraic values to both the width and the length, so the width would be X, and the legnth is 12 inches larger than the length so this would be expressed by: x+12, so the equation of the perimeter would be:

[tex]P=2W+2L[/tex]

[tex]P=2(x)+2(x+12)[/tex]

[tex]P=2x+2x+24[/tex]

Now you just evaluate the equation for perimeter=144.

[tex]144=2x+2x+24[/tex]

[tex]144=4x+24[/tex]

[tex]120=4x[/tex]

[tex]x=\frac{120}{4}[/tex]

[tex]x=\frac{120}{4}=30[/tex]

So the width of the rectangle is 30 inches.

Answers:

Explanation:

The given model provides a function that allows to approximate the population of Italy from 1990 through 2008 and predict the populations for other years, assuming validity of the same model over the coming years.

You only need to convert the year into the variable t and subsitute in the model.

1.  Calculate t for every year of your interest:

Year        t = year - 1990

1990             1990 - 1990 = 0 (initial value)

2000            2000 - 1990 = 10

2008            2008 - 1990 = 18

2015             2015 - 1990 = 25

2020            2020 - 1990 = 30

2. Calculate the population as per the model:

         [tex]p = 56.8e^{0.0015(10)}=57.7[/tex]

        [tex]p = 56.8e^{0.0015(18)}=58.4[/tex]

         [tex]p = 56.8e^{0.0015(25)}=59.0[/tex]

        [tex]p = 56.8e^{0.0015(30)}=59.4[/tex]

The formula of a slope:

[tex]m=\dfrac{y_2-y_1}{x_2-x_1}[/tex]

We have (-6, -8), (12, 7).

Substitute:

[tex]m=\dfrac{7-(-8)}{12-(-6)}=\dfrac{7+8}{12+6}=\dfrac{15}{18}=\dfrac{5}{6}[/tex]

The slope-point form:

[tex]y-y_1=m(x-x_1)[/tex]

We have m = 5/6 and (12, 7).

Substitute:

[tex]y-7=\dfrac{5}{6}(x-12)[/tex]

The slope-intercept form:

[tex]y=mx+b[/tex]

[tex]y-7=\dfrac{5}{6}(x-12)\\\\y-7=\dfrac{5}{6}x-\dfrac{5}{6}\cdot12}\\\\y-7=\dfrac{5}{6}x-\dfrac{5}{1}\cdot2\\\\y-7=\dfrac{5}{6}x-10\qquad|+7\\\\y=\dfrac{5}{6}x-3[/tex]

Answer:

37.5

Step-by-step explanation:

x= time not spent on the internet while on the computer

5/6 = 45/x

45*6/5 = x

This is the equation you should use

Hi Jd444976,

Answers to find in the answer graph.

Distance for each sport:

He Ran 5 Miles

He Rode Bike For 10 Miles.

Time It took to do each sport:

Running - 5 / 8 = 0.625 =  37.5 minutes

Cycling - 10 / 20 = 0.5 = 30 minutes

0.625 + 0.5 = 1.125 = 67.5 minutes

94

for her average to be at least 90 then letting x be the score she requires on her next test, then

[tex]\frac{85+89+92+x}{4}[/tex] = 90 ( solve for x )

multiply both sides by 4 to eliminate the fraction

85 + 89 + 92 + x = 360

266 + x = 360 ( subtract 266 from both sides )

x = 94

A plane is flat, so 2-Dimensional

Answer:

  31%

Step-by-step explanation:

Find the ratio and convert it to a percentage.

  (5 miles)/(16 miles) × 100% = 0.3125 × 100% = 31.25% ≈ 31%

You must multiply the numerators and denominations of each fraction

Hope this helped. If there is anything else l can help with, just let me know!

To multiply two fractions, multiply the numerator by the numerator and the denominator by the denominator.

A fraction can be defined as a numerical quantity that isn't a whole number.

Hence, a fraction is simply a part of a whole number.

Generally, a fraction comprises two (2) main parts and these include:

Mathematically, a fraction is represented as:

[tex]Fraction \;A = \frac{1}{2} \\\\Fraction \;B = \frac{2}{3}[/tex]

In order to multiply the two fraction, we would multiply the numerator by the numerator and the denominator by the denominator:

[tex]Fraction \;A \times Fraction \;B = \frac{1}{2} \times \frac{2}{3} \\\\Fraction \;A \times Fraction \;B = \frac{1\times 2}{2 \times 3} \\\\Fraction \;A \times Fraction \;B = \frac{2}{6} \\\\Fraction \;A \times Fraction \;B = \frac{1}{3}[/tex]

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Answer:

  see below

Step-by-step explanation:

The following definitions apply:

  if p, then q . . . . conditional statement

  if q, then p . . . . converse

  if ~p then ~q . . . inverse

  if ~q then ~p . . . contrapositive

You have ...

  p = "it is October 31"

  q = "it is Halloween"

(a) The converse is ...

  If it is Halloween, then it is October 31.

(b) The inverse is ...

  If it is not October 31, then it is not Halloween.

(c) The contrapositive is ...

  if it is not Halloween, then it is not October 31.

Answer:

The upper right hand corner

Step-by-step explanation:

One big clue to this is to note how the inequalities are x < 0 and x >= 2 so there is a gap of x values that are left out (x = 1 for instance). There will be NO graph points at all for any values in this gap. The only graph with such a gap is the upper right hand corner. So that is why this is the answer.

Another reason is that y = (-4/5)x-3 is a line that goes through (0,-3). Plug in x =0 and you'll get y = -3 when you simplify. There is an open hole here due to "x < 0". So x cannot actually equal zero for this part. At the same time, plug in x = 2 into the second piece and you get y = -4 as a result. So (2,-4) is on the second graph as a closed hole. The upper right hand corner has both of these points in the proper location.

Tomas will make 10 equal payments of $10.89 each to pay off the total cost of the trumpet which is $108.90.

This question involves simple division, the process of sharing an amount equally. Here, Tomas is dividing the total cost of a trumpet, which is $108.90, into 10 equal payments.

To find the amount of each payment, you simply divide the total cost by the number of payments. So, $108.90 divided by 10 gives us $10.89. Therefore, each payment Tomas will make for his trumpet is $10.89.

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Final answer:

Tomas will make 10 equal payments of $10.89 each to pay for the trumpet that costs $108.90 in total.

Explanation:

Tomas buys a trumpet for $108.90 and plans to make 10 equal payments to pay off the full amount. To find the amount of each payment, we divide the total cost by the number of payments. So, we calculate $108.90 ÷ 10, which results in each payment being $10.89. Therefore, each payment Tomas will make is $10.89.

Answer:

a1= -2/9

a2= 4/3

a3= 6

Step-by-step explanation:

[tex]a_n = 3a_{n - 1} + 2[/tex]

a_4= 20

lets plug in 4 for n

[tex]a_4 = 3a_{4 - 1} + 2[/tex]

[tex]20= 3a_3+ 2[/tex]

Subtract 2 from both sides and then divide by 3

18 = 3a_3

[tex]6=a_3[/tex]

lets plug in 3 for n and use a3=6 to find a2

[tex]a_3 = 3a_{3 - 1} + 2[/tex]

[tex]6= 3a_2+ 2[/tex]

Subtract 2 from both sides and then divide by 3

4 = 3a_2

[tex]\frac{4}{3}=a_2[/tex]

lets plug in 2 for n and find out a1

[tex]a_2 = 3a_{2 - 1} + 2[/tex]

[tex]\frac{4}{3}= 3a_1+ 2[/tex]

Subtract 2 from both sides and then divide by 3

[tex]\frac{-2}{3}= 3a_1[/tex]

[tex]\frac{-2}{9}=a_1[/tex]

Answer:

You were the 35th caller.

Step-by-step explanation:

For one minute, every 5th caller will win a music player and every 7th caller will win concert tickets.

If you were just the first caller to win both a music player and concert tickets, that means we need to find a least number which is divisible by both 5 and 7.

Actually we will find the LCM(Least common multiple) of 5 and 7.

[tex]5=1*5\\ \\ 7=1*7\\ \\ So, LCM = 1*5*7=35[/tex]

That means, you were the 35th caller.

Answer:

35

Step-by-step explanation:

One question before I give my answer , Where did it say she stopped?

Answer:

ohhhh cool i go to the same school

Step-by-step explanation:

Answer:

Maximum revenue = 1000 thousands of dollars.

Explanation:

We have the revenue equation [tex]r(x)=10x - 0.025x^2[/tex], where x is measured in thousands of toys produced, and r(x) is measured in thousands of dollars.

At maximum revenue the derivative of equation is zero

So, [tex]r'(x)=0\\ \\10 - 0.025*2x=0\\ \\ x=10/0.05\\ \\ x=1000/5=200[/tex]

So maximum revenue is when 200 thousands of toys are produced.

Maximum revenue, [tex]r(200)=10*200 - 0.025*200^2\\ \\ r(200)=1000[/tex]

Maximum revenue = 1000 thousands of dollars.

To convert 5 1/3 to an improper fraction, multiply the whole number part by the denominator and then add the numerator.

To convert the mixed number 5 1/3 to an improper fraction, you need to multiply the whole number part (5) by the denominator of the fraction part (3), and then add the numerator of the fraction part (1). The result becomes the numerator of the improper fraction, and the denominator remains the same. So, 5 1/3 as an improper fraction is 16/3.

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ANSWER

The subscription price of $45 provides the maximum revenue for the company

EXPLANATION

When the price is $[tex]40[/tex], the company sells [tex]2000[/tex] quantities.

The total revenue accrued

[tex]=40\times2000[/tex]

[tex]=$80,000[/tex]

When the price increases to $[tex]45[/tex] the quantity sold will decrease by 200 magazines which is [tex]2000-200=1800[/tex]

The total revenue accrued

[tex]=45\times 1800[/tex]

[tex]=81000[/tex] dollars

When the price increases to $[tex]50[/tex] the quantity sold will decrease by 200 magazines again which is [tex]1800-200=1600[/tex]

The total revenue accrued

[tex]=50\times 1600[/tex]

[tex]=80000[/tex] dollars

When the price increases to $[tex]55[/tex] the quantity sold will decrease by 200 magazines which is [tex]1600-200=1400[/tex]

The total revenue accrued

[tex]=55\times 1400[/tex]

[tex]=77000[/tex] dollars

Hence a subscription price of $45 provides the maximum revenue for the company.

The answer is b. I see you got it. You are welcome.

Answer:

The remaining child got a fraction of  [tex]\frac{1}{10}[/tex].

Step-by-step explanation:

Lets take the fraction of the money fourth child got is [tex]x[/tex]

Addition of all these fractions should be equal to 1.

⇒[tex]\frac{1}{3} +\frac{1}{6} +\frac{2}{5} +x=1[/tex]

⇒[tex]\frac{10+5+12+30x}{30} =1[/tex] (Taking a common denominator)

⇒[tex]\frac{27+30x}{30} =1[/tex]

⇒[tex]27+30x=30[/tex]

⇒[tex]30x=3[/tex]

⇒[tex]x=0.1[/tex]

Therefore,

The remaining child got a fraction of  [tex]\frac{1}{10}[/tex].

By calculating the combined fractions of the inheritance received by the first three children, we've determined that 27/30 of the inheritance has been allocated. Subtracting this from the whole leaves us with 3/30, which simplifies to 1/10 of the inheritance for the remaining child.

The student has asked about how much the remaining child will receive from a father's inheritance if the first received 1/3, the second received 1/6, and the third received 2/5 of the inheritance. To answer this, let's first add up the portions of the inheritance that the first three children received:

First child: 1/3

Second child: 1/6

Third child: 2/5

Now, we will find a common denominator to add these fractions. The least common multiple of 3, 6, and 5 is 30. Let's convert each fraction:

First child: 1/3 = 10/30

Second child: 1/6 = 5/30

Third child: 2/5 = 12/30

Now, add these fractions:

10/30 + 5/30 + 12/30 = 27/30

Once we add up these portions, we get 27/30 which represents the total part of the inheritance that has been given out to the first three children. To find out the portion for the remaining child:

30/30 (the whole inheritance) - 27/30 (the part given away) = 3/30

Reducing the fraction 3/30 gives us 1/10. So, the remaining child would receive 1/10 of the inheritance.

 1 inch :  3 meters

x 4          x 4        

4 inch :  12 meters

Answer: 12 meters

LCM(2, 3, 4) = 12

LCM(x, y, z) = xyz

therefore

LCM(2x, 3y, 4z) = 12xyz

the LCM is 4xyz.

The Least Common Multiple (LCM) of expressions 2x, 3y, and 4z is calculated by finding the smallest power of each individual variable and prime number base that can be divided evenly by each of the expressions. In this case, we have different variables and numerical coefficients. We must take the highest power of each distinct variable and multiply it by the highest coefficient from the numbers given to find the LCM.

Since 2, 3, and 4 are the coefficients, the highest among them is 4. We will use this and multiply by each of the variables x, y, and z. So, the LCM is 4xyz.