I NEED HELP IMMEDIATELY!!! Allen has four times as many cards as Bob, and Jane has twice as many cards as Allen. Together, Allen and Jane have 468 cards. How many cards do Allen, Jane, and Bob each have?

[tex]a_n=\frac{a_{n-1}+a_{n+1}}{2} \\a_n=\frac{-8+(-9)}{2} =-8,5[/tex]

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P.S. Hello from Russia :^)

Final answer:

The arithmetic mean An between A(n-1) = -8 and A(n+1) = -9 is calculated by taking the average of these two terms, resulting in An = -8.5.

Explanation:

To find the arithmetic mean An between A(n-1) and A(n+1), we use the definition of the arithmetic mean for a sequence of numbers. The mean of two numbers is simply the sum of those numbers divided by two, which can be represented by the formula: mean = (a + b) / 2. Given A(n-1) = -8 and A(n+1) = -9, we can set up the formula as follows:

An = (A(n-1) + A(n+1)) / 2

Substituting the given values results in:

An = (-8 + (-9)) / 2

An = (-17) / 2

An = -8.5

Therefore, the arithmetic mean An of the given terms is -8.5.

Answer:

When x = 4

Step-by-step explanation:

Division by zero is undefined. With real numbers, you are not allowed to divide by zero. Any value of x that causes the denominator to have a value of zero is not allowed. We need to find out which values of x cause the denominator to equal zero.

To do that, we set the denominator equal to zero and solve for x.

2x - 8 = 0

Add 8 to both sides.

2x = 8

Divide both sides by 2.

x = 4

Answer: The rational expression is undefined when x = 4

Check:

Let x = 4, and evaluate the denominator of the fraction.

2x - 8 = 2(4) - 8 = 8 - 8 = 0

By letting x = 4 in the denominator, the denominator does evaluate to zero causing an undefined value in the division. Therefore, our answer above is correct.

Answer:

50

Step-by-step explanation:

We could call this number x in our equation. First set the equation to this

[tex]\frac{3x}{5} = 30[/tex]

Multiply on both sides to get rid of 5

now it looks like this...

[tex]3x = 150[/tex]

divide 150 by 3 and you get this

x=50

Thank me later :)

Answer:

50

Step-by-step explanation:

Let the number be X

⅗X = 30

X = 30 × 5/3

X = 50

Answer:

Step-by-step explanation:

10 gets carried down.

The value of A in A(x² + 4x) = 13 that gives 10x² + 40x - 13 = 0 is 10.

A quadratic function is in the form:

y = ax² + bx + c

Given that:

10x² + 40x - 13 = 0

Solving using completing the square:

10x² + 40x = 13

10(x² + 4x) = 13

The value of A in A(x² + 4x) = 13 that gives 10x² + 40x - 13 = 0 is 10.

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Answer:

13.05 l

Step-by-step explanation:

For 12 liter of water 12/4 times 0.35 l concentrate has to be added.

The total liquid volume is then

12 + 12/4 * 0.35 = 13.05

(1 cl = 0.01 l)

Answer:

3.5l

Step-by-step explanation:

9514 1404 393

Answer:

  1278 × 4

Step-by-step explanation:

Apparently, a 4-digit number is being multiplied by a 1-digit number. We expect that the partial products are the result of multiplying single digit numbers with different place values.

So, 4000 = 1000 × 4 or 500 × 8

  800 = 200 × 4 or 100 × 8

We don't think 8 is the multiplier, because 500 and 100 have digits with the same place value multiplier (100).

Continuing, ...

  280 = 70 × 4

  32 = 8 × 4

The numbers being multiplied seem to be 1278 × 4.

Answer:B

Step-by-step explanation:

The x-intercept of the mathematical function f(x) = 3x(x – 1) will be at (0, 0) and (0,1).

The roots of the function are equal to 2 or less than 2.

The mathematical function is given below.

f(x) = 3x(x – 1)

Then the roots of the function will be

3x = 0

 x = 0

And x – 1 = 0

             x = 1

Then the x-intercept of the function f(x) = 3x(x – 1) will be at (0, 0) and (0,1)

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Answer:

4 lines

Step-by-step explanation:

40 + 10x = 20x

40 = 10x

4=x

I'm guessing there's a menu of choices to go with this one, and we just need to try (-2,9) with each choice.  But it's a much more interesting problem without the menu.

First we verify (-2,9) is on the line y=-7x-5,

-7(-2)-5 = 14-5 = 9, good.

There's a whole family of possibilities for the second equation, basically all the other lines through (-2,9).  Believe it or not, that's called a pencil of lines. We need two parameters a and b, whose values only matter in ratio, to represent all these.  If we tried to do it with just the slope we'd miss one line, the vertical line x=-2.

We'll do the line through (-2,9) and (a,b).  A little thought tells us it's

(a + 2)(y - 9) = (b - 9)(x + 2)

When we plug in (-2,9) we get 0=0, good.  When we plug in (a,b) we get

(a + 2)(b - 9) = (b - 9)(a + 2)

which is also true.

(a + 2)(y - 9) = (b - 9)(x + 2)

(b - 9)x - (a+2)y = -9(a + 2)  - 2(b-9)

(b - 9)x - (a+2)y =  -9a - 2b

We can choose any a and b and we'll get the line through (-2,9) and (a,b), so it will have a solution (-2,9) where it meets y = -7x - 5.

We need to make sure (a,b) isn't already on  y = -7x - 5 which is the same line twice.

For arbitrary a,b,  b ≠ -7a - 5, the lines y = -7x - 5  and

(b - 9)x - (a+2)y =  -9a - 2b

meet at exactly one point, namely (-2,9)

Let's generate a few and plot.  We'll do a vertical and horizontal an a couple of others.  

a=-2, b=0,     (b - 9)x - (a+2)y =  -9a - 2b

-9x = 18

x = -2

a=0, b=9,    (b - 9)x - (a+2)y =  -9a - 2b

-2y = -18

y = 9

a=1, b=1,    (b - 9)x - (a+2)y =  -9a - 2b

-8x - 3y = -11

a=1, b=3,    (b - 9)x - (a+2)y =  -9a - 2b

-6x - 3y = -15

2x + y = 5

plot y=-7x+5, x = -2, y = 9, -8x - 3y = -11, 2x - y = 5

Answer:

2412

Step-by-step explanation:12*12*13=1872 15*12*3=540 1872+540=2412

Answer:

Bulldogs

Cardinals

Tornado

Step-by-step explanation:

Cardinals: 31 injuries

Tornado: 31 injuries

Bulldogs : 17 injuries

I think I did this right and i counted them twice, but they are the same so it doesn't matter where you put them and if this is wrong then im sorry but i counted them several times. If this is right can I get a brainliest?

Answer:

93 students

Step-by-step explanation:

Answer:

266-----------35%

x----------------100%

x=(266 * 100%) / 35%= 760

There are 760 students in the middle school

Step-by-step explanation:

We solve this problem by the rule of three.

Answer:

D (-4,2)

Step-by-step explanation:

The coordinates of F is (-4,2), the correct option is D.

A parallelogram is a polygon with four sides, the opposite sides of the parallelogram is equal and parallel.

The figure is attached with the answer.

The final image is obtained by series of Transformations

1. Translation (1,2)

Translation T₁,₂ is (x,y)→(x+1,y+2)

So, After translation from F to F' the point  F' = (x+1,y+2)

2. After Reflection along y axis F" = (-(x+1), y+2)

F" = ( 3,4)

F' = (-3,4)

F = (-4 , 2)

Therefore, the coordinates of F is (-4,2), the correct option is D.

The missing figure is attached with the answer.

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Answer:

8x+8

Step-by-step explanation:

The perimeter is all the sides added together:

3x+2+6x-1+7-x = 8x+8

The perimeter of the triangle in terms of x is expressed as 8 ( x - 1 ).

Given,

The sides of a triangle are 3x+2, 6x-1, and 7-x.

We need to express the perimeter of the triangle in terms of x.

It is given by:

Perimeter = sum of all three sides.

Find the sides of a triangle.

We have,

One side = 3x + 2

Second side = 6x - 1

Third side = 7 - x

Find the perimeter of the triangle.

Perimeter:

= one side + second side + third side

= (3x + 2) + (6x - 1) + (7 - x)

= 3x + 2 + 6x - 1 + 7 - x

= 3x + 6x - x + 2 - 1 + 7

= 8x + 8

Taking 8 common

= 8 ( x - 1 )

Thus the perimeter of the triangle in terms of x is expressed as 8 ( x - 1 ).

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Answer:

(-2+-5) equals -7.

Because the signs are the same, we dont change it.

(3+5) equals 8. Same like the other equation, the signs are the same so we do not change it.

Now we do (-7+8) The answer will be 1. Lets use a little graph since its hard to explain.

-8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8

Mark -7 anyway you want. (Circle it, draw a line under it, what ever you want.)

Now Move the line 8 times.

When you do that your line will stop at 1.

And thats how you do it.

Step-by-step explanation:

Answer:

All you have to do is Subtract the first number of both equation so 2-3= 1.

Step-by-step explanation:

Answer:

4/15 = 0.266666%

Step-by-step explanation:

Answer: 825 minutes

Step-by-step explanation: We know there is a total of 15 people in the book club. We also know that 10 people each read an average of 65 minutes each day, and the remaining 5 people read for an average of 35 minutes each day.

To find the total amount f minutes read, simply multiply the amount of people by the minutes read.

10 x 65 = 650 total minutes read if 10 people each read 65 minutes for one day.

5 x 35 = 175 total minutes read if 5 people each read for 35 minutes in one day.

Now, simply add the total minutes read to find the reading time fr the entire book club each day.

650 + 175 = 825 average reading time for the entire book club each day.

Answer: 400

Step-by-step explanation:

25÷4=6.25

2500÷6.25=400

Based on the random sample of 25 iPhones in which 4 were found to be defective, it is projected that approximately 400 iPhones in the total shipment of 2,500 would be defective.

The question is essentially asking for a projection based on a statistical sample. In this case, the sample is 25 iPhones, out of which 4 were found to be defective. This implies that, out of every 25 iPhones, we can expect approximately 4 to be defective.

To project this onto the entire shipment of 2,500 iPhones, we can use the proportion found in the sample. Divide the total number of iPhones by the sample size to find the number of 'samples' in the shipment: 2500 ÷ 25 = 100. Then multiply this by the number of defective iPhones found in the sample: 100 x 4 = 400.

So based on the sample, the manager can expect approximately 400 iPhones in the shipment to be defective.

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Answer:

Tj hit 85% of the balls pitched to him

Step-by-step explanation:

Answer:

8.4

Step-by-step explanation:

To round to the nearest tenth, first go to the hundredth place, which in this case is a 3. If this is number is lower than 5, keep the tens place as it is, which is how it is in this problem.

Answer:

8.4

Step-by-step explanation:

The tenths is the first number to the right of the decimal. If the number to the right of the tenths digit is 5 or above you round it up, if it is less than 5 you round it down. In this case it is 3 which is less than 5 so you round it down to 8.4

Answer:

12

Step-by-step explanation:

Answer:

[tex]B_2=4\pi r^2[/tex]

Step-by-step explanation:

we know that

The area of the base of a cylinder is given by the formula

[tex]B=\pi r^{2}[/tex]

where

r is the radius of the circular base

If the radius is doubled

then

[tex]r=2r[/tex]

The new base area is

[tex]B_2=\pi (2r)^{2}\\B_2=4\pi r^2[/tex]

so

[tex]B_2=4B[/tex]

therefore

The new area of the base is 4 times the area of the original base

Answer:

A) The expression is a trinomial.

Step-by-step explanation:

If the degree is 2, the expression would be a binomial, not a trinomial. If this answer is correct, please make me Brainliest!

Answer:

14.1 in³

Step-by-step explanation:

Volume of sphere:

(4/3) × pi × r³

(4/3) × (22/7) × 1.5³

= 14.1428571426 in³

Answer:

14.1 cubic inch

Step-by-step explanation:

[tex]volume \: of \: knob \\ = \frac{4}{3} \pi {r}^{3} \\ = \frac{4}{3} \times 3.14 \times {1.5}^{3} \\ = \frac{4}{3} \times 3.14 \times 3.375 \\ = \frac{4}{3} \times 10.5975\\ = \frac{42.39}{3} \\ = 14.13 \: {inch}^{3} \\= 14.1 \: {inch}^{3} \\ [/tex]

Answer:r= 2.26 inches

Step-by-step explanation:

Answer: r=4inches

Step-by-step explanation:

Volume of a cone= pir2h/3

Pi= 3.14

R=?

H=18

V=96pi

Substitute for the values

V=pir2h/3

96pi=pir218/3

Pi will cancel pi out

So we have

96=r218/3

Cross multiply

R2=96×3/18

R2=16

R=square root of 16

R=4inches

The radius is 4inches

Answer:

^3(square root symbol) x^4 this is for radicals only

Step-by-step explanation:

If you are doing fractions then the correct answer would be x1 1/3

Explanation for ^3(square root symbol) x^4

When writing these in radicals simplified x^4/3 you put the denominator over your square root, and your numerator will be squared by your denominator. But your numerator must be to x as x is the constant. So ^3(square root symbol) x^4 = x^4/3

Explanation for x1 1/3

When simplifying fractions you take out the extra of the fraction and turn it into its own fraction, and the whole fraction you are left with, in this case being 3/3, you turn into a whole number, which is 1, and you add your left over fraction, 1/3, and put them together 1 1/3, but don't forget your x, x1 1/3

The expression 'x 4/3' can alternatively be written as the cube root of x to the fourth power, expressed as ∛[tex](x^4)[/tex]a mathematical context.

The statement x 4/3 is a mathematical expression which can be interpreted in different ways based on context.

If the intention is to write the expression x to the power of 4/3, it can be expressed as a radical, specifically as the cube root of x4.

The cube root operation can be represented by the radical symbol, so the alternative way to write it would be ∛(x4).

This would not be a Unit Conversion question. It is essential to understand that without further context, the expression is ambiguous and might represent other mathematical operations or concepts.

However, it does not seem to relate directly to any of the extraneous information provided.

Answer:

No

Step-by-step explanation:

Answer:

Step-by-step explanation:

Spinner A

Spinner B

Probability of both A and B land on red:

Number of attempts to get outcome of 84 red on both spinners is:

Probability of both spinners land on blue:

Estimated number of both spinners land on blue:

The estimated number of times that both spinners will land on blue is 56 times. This was calculated based on the number of times both spinners land on red and the probabilities of each spinner landing on blue.

This problem deals with the subject of probability. Since we know that the number of times both spinners (A and B) land on red is 84, we can use this as a base to find the probability for each to land on blue.

The probability of spinner A landing on red is 0.5, therefore the probability of it landing on blue will also be 0.5 (1-0.5=0.5). Similarly, the probability of spinner B landing on red is 0.6, thus the probability of it landing on blue is 0.4 (1-0.6=0.4).

To get the overall probability of both spinners landing on blue, we multiply the probabilities for each individual spinner. Hence, the overall probability is 0.5 * 0.4 = 0.2.

Finally, to find the estimated number of times both spinners will land on blue, we can divide the number of times both spinners land on red (84) by the ratio of the probability for both landing on blue to the probability for both landing on red, yielding an estimate of 84 * (0.2 / 0.3) = 56 times.

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Answer:

Step-by-step explanation:

To solve this

We have

Let the number think of b x

Three subtracted from the number will be

x-3

Then multiply by 4

4(x-3)

Open d brackets

4x-12

According to the given statement the expression will be "4x-12".

Let,

When "3" is subtracted from the number "x", we get

→ [tex]x-3[/tex]

and,

When "x-3" is multiply by "4", we get

→ [tex]4(x-3)[/tex]

After solving the brackets, we get    

→ [tex]4x-12[/tex]

Thus the answer above is correct.

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