A)the eight term of arthematic sequence is 28, the common difference is 6 calculate the first term of sequence.
B) The sum of first n term is 760
calculate the vale of n.

Answers

Answer 1

Solution

Part A

The general form of the n-th term = a + (n-1)d

Here we are given the 8th term A8 = 28 , common difference (d) = 6

A8 = a + (n - 1) 6

28 = a + (8- 1)6

28 = a + 7*6

28 = a + 42

a = 28 - 42

a = -14

Part B

n-th term  is 760. a = -14 and d = 6.

Plugging in the values in the general form, we get

760 = -14 + (n -1)6

760 = -14 + 6n - 6

760 = -20 + 6n

6n = 760 + 20

6n = 780

Dividing both sides by 6, we get

n = 780/6 = 130

The value of n is 130


Related Questions

3 1⁄8 − 1 7⁄8 =
what is the answer

Answers

2 6/8 i think hope this helps

Original price 89.00 mark down 33%

Answers

You will mark down the product $29.37. So it would be 89.00-29.37=59.63

I need help someone

Answers

C is most definitely the answer

find dy/dx for y=log (tan2x)

Answers

Final answer:

To find dy/dx for y=log(tan(2x)), we can use the chain rule: dy/dx = (2sec²(2x))/tan(2x).

Explanation:

To find dy/dx for y = log(tan(2x)), we can use the chain rule. Let's break it down step by step:

First, we identify the inner function, which is u = tan(2x).

Next, we find the derivative of the inner function with respect to x: du/dx = 2sec²(2x).

Then, we identify the outer function, which is y = log(u).

Finally, we find the derivative of the outer function with respect to u and multiply it by the derivative of the inner function with respect to x: dy/dx = (1/u) * (du/dx) = (2sec²(2x))/tan(2x).

Need help with these please. My answers were wrong.

Answers

B.  First and Second St appear to be parallel

What is the fourth term of the sequence 4, 8, 12, 16, 20, 24, . . .?

Answers

Final answer:

The fourth term of the arithmetic sequence 4, 8, 12, 16, 20, 24, ... is 16, which can be found either by adding the common difference to the third term or by using the formula for the nth term of an arithmetic sequence.

Explanation:

The fourth term of the sequence 4, 8, 12, 16, 20, 24, ... can be determined by looking at the pattern of the sequence. This sequence is an arithmetic sequence, where each term increases by the same amount, which is 4 in this case. To find the fourth term, we can simply add the common difference (4) to the third term (12), which gives us 16. Alternatively, we can use the formula for the nth term of an arithmetic sequence, which is an = a1 + (n - 1)d, where a1 is the first term, d is the common difference, and n is the term number. Using this formula with a1 = 4, d = 4, and n = 4, we again get the fourth term as 16.

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one cantaloupe cost $2 how many cantaloupes can you buy for $6

Answers

3 because 6 divided by 2 equals 3

If it takes 1/8 of the frosting container to cover 1/6 of the cake, how much frosting is needed to cover one cake?

Answers

1/8 : 1/6
x : 1
________________

1/6x = 1/8
x = 1/8 ÷ 1/6 = 0.75
Final answer:

To cover one cake, we need approximately 1.33 times the amount of frosting that covers 1/8 of the container.

Explanation:

To find out how much frosting is needed to cover one cake, we need to find the ratio between the amount of frosting and the amount of cake that is covered. We are given that 1/8 of the frosting container covers 1/6 of the cake. To simplify this ratio, we can find a common denominator, which is 24. So, 1/8 of the frosting container is equivalent to 3/24 and 1/6 of the cake is equivalent to 4/24.

Since the ratio is now 3/24 frosting to 4/24 cake, we can say that for every 3 parts of frosting, we need 4 parts of cake. So, if we want to cover one cake, we would need 4/3 times the amount of frosting, which is approximately 1.33 times the amount of frosting needed to cover 1/8 of the container.

Therefore, to cover one cake, we need approximately 1.33 times the amount of frosting that covers 1/8 of the container.

find three consecutive even integers such that the sum of twice the smallest and three times the largest is 42

Answers

[tex]2n,2n+2,2n+4\\\\\\2\cdot2n+3(2n+4)=42\\\\4n+6n+12=42\\\\10n=30\\\\n=3\\\\2n=2\cdot3=6\\2n+2=6+2=8\\2n+4=6+4=10[/tex]

6,8,10

Solve the inequality, -4 less than 4(6y-12)-2y

Answers

-4 < 4(6y - 12) - 2y

Distributive property.

-4 < 24y - 48 - 2y

Combine like terms.

-4 < 22y - 48

Add 48 to both sides.

44 < 22y

Divide both sides by 22.

2 < y

The value of y is greater than the value of 2.

Answer:

y<2 i got it right on my test

Step-by-step explanation:

3.6 divided 4 I want the steps

Answers

3.6 /4


= (3.6/4) 10

= 36/40

= 0.9



Answer 0.9

0. 9 because 4*9 =36

1. Emmanuel bought 27 lb of potting soil this week. This amount is 5 lb more than twice the amount of potting soil he bought last week. Answer the following questions to find the number of pounds of soil Emmanuel purchased last week.
(a) What are you being asked to find?
(b) Write an equation to model the problem.
(c) How many pounds of potting soil did Emmanuel buy last week? Show the calculations

Answers

(a) What are you being asked to find?

the number of pounds of soil Emmanuel purchased last week

(b) Write an equation to model the problem.

Let x = amount of potting soil Emmanuel bought last week.

2x + 5 = 27

(c) How many pounds of potting soil did Emmanuel buy last week? Show the calculations

2x + 5 = 27

Subtract 5 from both sides.

2x = 22

Divide both sides by 2.

x = 11

Answer: Emmanuel bought 11 lb of potting soil last week.

Eli has 7 games on his phone. His sister has 6 more than him. Which ratio compares the number of games on Eli’s phone to the number of games on his sister’s phone?

Answers

13 : 7
(as eli has seven
and his dister has 6 more therefore 6+7 =13)

so this must be the correct answer

hope it will help you

is this comparison true 2.29 < 2.129

Answers

No.

The value of 2.29 is greater than, not less than, the value 2.129.

2 and 1 are in the same location in each number: the tenths position. 2 is larger than 1 is, and thus 2.29 is larger.

what best approximates the intervals on which the graph of the function f(x)=x^4+2x^3-5x^2-6x is decreasing?

Answers

Solution: The function [tex]f(x)=x^4+2x^3-5x^2-6x[/tex] is decreasing on [tex](-\infty ,-2.303]\cup [-0.5,1.303][/tex].

Explanation:

The given function is  [tex]f(x)=x^4+2x^3-5x^2-6x[/tex].

differentiate with respect to x.

[tex]f'(x)=4x^3+6x^2-10x-6[/tex]

To find the extreme points put [tex]f'(x)=0[/tex] and find the value of x.

[tex]f'(x)=4x^3+6x^2-10x-6=0[/tex]

[tex]2(2x^3+3x^2-5x-3)=0[/tex]

By hidden trial [tex]\frac{-1}{2}[/tex] is the root of the equation and [tex](x+\frac{1}{2} )[/tex] is factor of the equation.

[tex]2(x+\frac{1}{2} )(2x^2+2x-6)=0\\4(x+\frac{1}{2} )(x^2+x-3)=0\\4(x+\frac{1}{2} )(x+2.303)(x-1.303)=0[/tex]

The extreme points of graph [tex]x=-0.5, -2.303, 1.303[/tex]

The intervals are [tex](-\infty ,-2.303]\cup[-2.303,-0.5]\cup [-0.5,1.303]\cup [1.303,\infty )[/tex].

Put any value from each interval in [tex]f'(x)=4x^3+6x^2-10x-6[/tex].

If the value of [tex]f'(x)>0[/tex], then the function increase on that interval.

If the value of [tex]f'(x)<0[/tex], then the function decrease on that interval.

Since the value [tex]f'(x)<0[/tex] on [tex](-\infty ,-2.303][/tex]. and [tex][-0.5,1.303][/tex], therefore function [tex]f(x)=x^4+2x^3-5x^2-6x[/tex] is decreasing on [tex](-\infty ,-2.303]\cup [-0.5,1.303][/tex].

Cos xcos y=1/2(sin(x+y)+ sin(x-y))

Answers

Taking Rhs

1/2 [sin(x+y)+ sin (x-y)]

using sinA + sin B = 2 cos (A+B)/2 cos( A - B)/2

1/2 [ 2 Cos ( x+y+x-y)/2 . Cos (x+y-x+y)/2]

=Cos 2x/2. Cos 2y/2 = Cos x . Cos y

Hence true

Thanks for your help in Math :)

Answers

'a' and 'b' are placeholders for some numbers. In this case, a = 3 and b = 5. So we'll replace every copy of 'a' with 3 and every copy of 'b' with 5. Afterwards, we use PEMDAS to simplify

4(a+2b) = 4*(3+2*5) = 4*(3+10) = 4*(13) = 52

Answer: 52

johnny had 5/6 cups of rice. He wants to separate the rice into 1/3 servings. how many sevings can Johnny make?

Answers

so first lets make the denominators the same so that we can divide

1/3 = 2/6

5/6

if you divide johny can make 2 cups of serving and  R 1/5

Tuesday morning the temperature was -4°F. The temperature rose 5°F by lunchtime and dropped 30°F by midnight. What is the temperature in Seattle at midnight?

Answers

Okay, to start off using a number line is always useful. Negative 4 plus 5 equals 1, if it dropped by 30 which is subtracting 30 from 1 it takes 1 out of the positive zone to the negative. Which equals to negative 29.

answer plz answer this question

Answers

No he did not find the right question

no he didn't find the right one

aniel is 16 years old. His age is twice his brother's age, which is represented by x. Write and solve an equation to determine the age of Daniel's brother. we

Answers

Write an equation.

16=2x

x=8

Daniel's brother is 8 years old.

Using the concept of proportional relationship, the age of Daniel's brother is 8 years

Given the Parameters :

Brother's age = x

Daniel's age = 16

Daniel's age = 2 × brother's age

Hence,

16 = 2 * x

16 = 2x

Divide both side by 2

x = 16/2

x = 8

Hence, the brother's age is 8

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The sum of two numbers is 32. One of the numbers is 4 less than 5 times the other. What are the numbers?

Answers

Let the first number be = x

Then other number according to question is

4 less than 5 times the number i.e. 5x-4

Also ,sum of numbers is 32

x+5x-4=32

6x-4=32

Add 4 to both sides

6x-4+4=32+4

6x=36

Divide both sides by 6

x=36/6

x=6

First number =x =6

Other number =5(6)-4 = 30-4 =26

Answer: 26 and 6

Step-by-step explanation: Let's use two variables to represent our two numbers in this problem. Since a variable is a letter that represents any number, we can pick any letters we want to but I will use with x and y.

So if the sum of two numbers is 32, that means x + y = 32.

To solve for two separate variables, we will need two separate equations. So for the second equation, let's read through the second sentence in the problem.

"One of the numbers" that's x, "is" means equals, "4 less than 5 times the other" is not 4 - 3y, it means 5y - 4. The word "less than" switches the order around. So we now have x = 5y - 4.

So to solve this system of equations, let's use substitution. Since x = 5y - 4, we can substitute a 5y - 4 in for x in the first equation to get (5y - 4) + y = 32. Solving from here we get 6y - 4 = 32 by combining like terms. Now we can get rid of that -4 by adding 4 to both sides of the equation to get 6y = 36. Now, we will divide both sides of the equation by 6 in order to isolate y and we end up with y = 6.

To find x, plug 6 back in for y in the second equation to get x = 5 (6) -4 which we can simplify to x = 30 - 4 which simplifies to x = 26.

Therefore, our two numbers in this problem are 26 and 6.

Is Trazillion a number

Answers

No it is not a real number

Yes, it is a number. It equals 1,000,000,000,000.

Solve the following systems of equations algebraically. Verify your solution either graphically or by using matrices.
3x - y=0
5x + 2y=22

Answers

3x - y=0

5x + 2y=22

Solve the first equation for y

3x - y =0

-y = -3x

so y = 3x

Now plug in y=3x in second equation

5x + 2y=22

5x + 2(3x) =22

5x + 6x = 22

11x = 22

Divide by 11 on both sides

x= 2

Plug in 2  for x and find out y

y = 3x

y = 3(2) = 6

Solution is (2,6)

The graph is attached below to verify the solution

Both lines intersects at (2,6)

so our answer is correct.


Wayne has 6 times the number of songs on an MP3 player as his mom.If wayne has 1800 songs ,what equation could you write to find the number of songs.his mom has on her MP3 player.

Answers

Answer:

1,800/6

Step-by-step explanation:

if he has 6 times more songs than his mum & he has 1,800 in total his mum has 1/6 of 1,800 e.g. 1,800/6

A recipe calls for 2 3/4 cups of milk and if the recipe is tripled how much milk is needed

Answers

Here are two ways of solving this problem.

Method A. Using fractions.

You will need 3 times as much milk, so you need to multiply 3 by 2 3/4.

First, convert 2 3/4 into an improper fraction.

2 3/4 = 2 + 3/4 = 2/1 + 3/4 = 8/4 + 3/4 = 11/4

Now multiply 11/4 by 3.

3 * 11/4 = 3/1 * 11/4 = 33/4

Now convert 33/4 into a mixed numeral.

33/4 = 8 1/4

Answer: 8 1/4

Method B. Using decimals.

You will need 3 times as much milk, so you need to multiply 3 by 2 3/4.

First, convert 2 3/4 into a decimal number.

2 3/4 = 2.75

Now multiply 2.75 by 3.

3 * 2.75 = 8.25

Now convert 8.25 into a mixed numeral.

8.25 = 8 + 0.25 = 8 + 1/4 = 8 1/4

Answer: 8 1/4

Correct answer is: [tex]8\frac{1}{4}[/tex] cups milk needed if the recipe is tripled.

Solution:-

Given that a recipe calls for [tex]2\frac{3}{4}[/tex] cups of milk.

Let us convert that mixed fraction to proper fraction.

[tex]2\frac{3}{4}=\frac{2*4+3}{4}=\frac{11}{4}[/tex]

If the recipe is tripled, milk also should be tripled.

Hence amount of milk = [tex]3*\frac{11}{4}=\frac{33}{4}=8\frac{1}{4}[/tex]

m=-3/7 ; (-5,6) what is the equation of the line

Answers

y - 6 = -3/7(x + 5)

y - 42/7 = -3/7x - 15/7

y = -3/7x + 27/7

6.4n-10=4.4n+6
plz show me the work plz

Answers

6.4n-10=4.4n+6
-4.4n. -4.4n
2n-10=6
+10. +10
2n=16
/2. /2
N=8

The solution of the given expression is n = 8.

What is the expression?

Expressions are defined as mathematical statements that have a minimum of two terms containing variables or numbers.

What are Arithmetic operations?

Arithmetic operations can also be specified by subtracting, dividing, and multiplying built-in functions.

- Subtraction operation: Subtracts the right-hand operand from the left-hand operand.

for example 4 -2 = 2

/ Division operation: Divides left-hand operand by right-hand operand

For example 4/2 = 2

We have been given that expression as :

⇒ 6.4n - 10 = 4.4n + 6

Rearrange the likewise terms in the above expression,

⇒ 6.4n - 4.4n = 6 + 10

Apply the subtraction operation in the terms,

⇒ 2n = 16

⇒ n = 16/2

Apply the division operation in the terms,

⇒ n = 8

Therefore, the solution of the given expression is n = 8.

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FIRST ONE TO ANSWER GETS A BRAINLY!!! PLEASE HELP!!!



The table shows the relationship between the cost of a t-shirt to a store and the retail price that the store charges for t-shirts after a markup

a. Is the relationship propotional. Explain how you know.

b. Write and equation that represents the relationship.

c. Predict the retail price that the store will charge for a t-shirt that cost the store 9.50. Justify your reasoning.

Table:

Cost($), x Retail Price ($), y
6.00 7.50
7.00 8.75
8.00 10.00
9.00 11.25

Answers

Answer:

Step-by-step explanation:

8.00 to 10.00 yes the relationship is proportional because it is the eniquality between two ratios 8.00 and 10.00

Final answer:

This detailed answer explains the proportional relationship between the cost and retail price of t-shirts in the given data table, provides the equation representing the relationship, and predicts the retail price for a t-shirt costing the store $9.50.

Explanation:

a. Is the relationship proportional? Yes, the relationship is proportional because the ratio between the cost and the retail price remains constant. This can be seen by calculating the cost-to-price ratios for each pair of values. If the ratios are the same, the relationship is proportional.

b. Write an equation that represents the relationship: The equation for the relationship is y = 1.25x + 0.75 where y represents the retail price and x represents the cost to the store.

c. Predict the retail price for a t-shirt that cost the store $9.50: Substituting $9.50 for x in the equation gives us a predicted retail price of $11.88. The store is likely to charge $11.88 for a t-shirt that cost them $9.50.

Help (20 points) Literal Equations

Answers

I'm not sure if you were supposed to add two numbers together to get five? If that's the case the answer would be 5/3. If it's not i'm sorry, I tried.

Try plugging in numbers start with 4
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