please help answer thanks

Answer:

Σ-47-15)

Step-by-step explanation:

Option D is correct, the summation formula that represents the series is Σ(n-4) for n=1 to 4.

Sequence is an enumerated collection of objects in which repetitions are allowed and order matters.

A series is, roughly speaking, the operation of adding infinitely many quantities, one after the other, to a given starting quantity.

The series can be written as:

13 + 9 + 5 + 1 = (4×3 + 1) + (4×2 + 1) + (4×1 + 1) + (4×0 + 1)

= (4×(3-1) + 1) + (4×(2-1) + 1) + (4×(1-1) + 1) + (4×(0-1) + 1)

= Σ(n-4) from n=1 to 4

Therefore, the summation formula that represents the series is Σ(n-4).

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The measure of the angle is ∠ADB=60

The angle sum property of a triangle states that the sum of interior angles of a triangle is 180°

Given here: ∠A =∠B=60

By triangle sum property we must have ∠A +∠B+∠D=180

                                                                                 ∠D=60

Thus the triangle must be an equilateral triangle with all its angles equal to 60

Hence, The measure of the angle is ∠ADB=60

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Answer:

7)x=20 8)x=19

Step-by-step explanation:

7)4x-40=2x

4x-2x=40

2x=40

x=20

8)

2x+19=3x

3x-2x=19

x=19

Answer:

26.25 in³, y = 15x

Step-by-step explanation:

2. Volume is multiplying the length, width, and height of a rectangular prism together.

Therefore, the volume of this rectangular prism is 6 * 1.25 * 3.5

= 26.25 in³

3. The equation that represents the function table will describe the relationship between x and y. As we can see, for every x value, the y value grows by 15. Therefore:

y = 15x

Hope this helps :)

Answer: the domain is all real numbers.

The base must be less than 1 and greater than 0.

The function has a consumer multiplicative rate of change.

Step-by-step explanation:

Answer:

A, D, E

Step-by-step explanation:

100% on edg

Answer:

In the equation 9 X 3 = 27, each factor stands for:

Step-by-step explanation:

When you must know the area of a terrain or figure, you must know what is the form of that (circle, triangle, rectangle, square, or another figure), because, with this, you can use different formulas of the area, in the case given in the exercise, the formula used is to a rectangle (is the same that a square, but how the length and the width aren't equal, is a rectangle), knowing this the formula is:

In a rectangle, the length is bigger than the width, by this reason 9 is the length, 3 the width and the result is the area, how you can see below:

Answer: -4

Step-by-step explanation:

Answer:

idk just did like 9 math problems :/

Step-by-step explanation:

ill come back in an hour

Step-by-step explanation:

it's on the -0.8 number...

Answer:-0.8

Step-by-step explanation:count from -1 up to where B is

Answer:

The answer is 108.

Step-by-step explanation:

This can be solved with a simple proportion. 5/12 = 45/1. For 5 to become 45, you need to multiply by 9. You do the same to the denominator. 12 times 9 is 108.

Answer:

[tex]\mathrm{B}[/tex]

Step-by-step explanation:

[tex]126+3x=180[/tex]

[tex]3x=180-126[/tex]

[tex]3x=54[/tex]

[tex]\frac{3x}{3}=\frac{54}{3}[/tex]

[tex]x=18[/tex]

Answer:

[tex]x = 18[/tex]

Step-by-step explanation:

Co - interior angles = 180°

[tex]3x + 126 = 180 \\ 3x = 180 - 126 \\ 3x = 54 \\ \frac{3x}{3} = \frac{54}{3} \\ x = 18[/tex]

Answer:

Its D

Step-by-step explanation:

just put the answear stop putting this bs

Answer:

The Correct answer you are looking for is (D) - On a coordinate plane, a horizontal line is at y = negative 8.

Step-by-step explanation:

Hope this helped all of you!

Answer is letter (D) the bottom graph.

Answer:

The answer is D.

Step-by-step explanation:

The first step would be to multiply 3x^2 and x+2 which gives us D after distributed.

Answer:

14°

Step-by-step explanation:

Because 76° and x are complementary (meaning they add up to 90°), 76 + x = 90 which means x = 14°.

Answer:112 years, you see a pattern of multiplying by 2, take 224 and divide it by 2 and you get 112

Step-by-step explanation:

Step-by-step explanation:

Well seeing as each year the amount of Trees Doubled (7+7=14 and 14+14=28)

We can Infer that each year afterwards it will do so.

So 1 year from now 28+28 = 56

2 years from now 56 + 56 = 112

And finally at 3 years 112+112 we arrive at our answer 224

Answer: So it would take 3 years to get to get to 224

Answer:

Let's get all of the z terms on one side. When we do so we get tz + cz - 6z = -83. We can factor the left side as z(t + c - 6) = -83 so our answer is z = -83(t + c - 6).

Answer:

Z= 83

——————

(-c + 6)

Step-by-step explanation:

Answer:

Cone that has 3 times the height, but the same base

Step-by-step explanation:

The formula for cone's volume is 1/3bh while cylinder is just bh

Answer:

the answer is A)1,432.75.

Answer:

B

Step-by-step explanation:

> = greater than

= this means equal to

< = less than

[tex]\frac{8}{13} =\frac{8}{13}[/tex]

Answer:

B, 210

Step-by-step explanation:

there is 10 options for the first one, 9 option for the second, 8 options for the third and 7 for the last. 10*9*8*7=5040, which is d

First number can be 1 out of 10

Second number can be 1 out of 9

Third number can be 1 out of 8

Fourth number can be 1 out of 7

Total combinations = 10 x 9 x 8 x 7 = 5,040

The answer is D. 5,040

Answer:

Yes.

Step-by-step explanation:

Substitute in the equation for x and y:

-8 = -3 + -5  = -8.

Step-by-step explanation:

100-50=50

50/5=10

10/10=1 and

The area of the hexagon is the amount of space on it

The area of the hexagon is 374.112 square inches

The perimeter is given as:

P = 72 inches

The length of the hexagon is calculated using:

L = P/6

So, we have:

L =72/6 = 12

The area is then calculated as:

A = 1.5[tex]\sqrt 3[/tex] * L^2

This gives

A = 1.5[tex]\sqrt 3[/tex] * 12^2

Evaluate the product

A = 374.112

Hence, the area of the hexagon is 374.112 square inches

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If the first diver was already at -18 feet and then dived down an additional 30 feet, we add the two negative numbers together. The first diver is at -48 feet while the second diver is at -27 feet.

Answer:

Diver A is 21 ft below Diver B

Step-by-step explanation:

Diver A

-18 then goes down 30

-18 - 30 = -48

Diver B is at -27

Relationship

-48 - -27

-48+27 = -21

Diver A is 21 ft below Diver B

Answer:

$178,000

Step-by-step explanation:

The calculation of X and Y is shown below:-

Before that we need to do the following calculations

[tex]Depreciation\ in \ 1\ year = 45\%\times Initial\ investment[/tex]

[tex]= 0.45\times\$400,000[/tex]

= $180,000

[tex]Depreciation\ in \ 4\ year = 6\%\times Initial\ investment[/tex]

[tex]= 0.06\times\$400,000[/tex]

= $24,000

Now, Operating cash flow of X in Year 1

[tex]X = (Revenue - Cost)\times (1 - Tax \ rate) + Depreciation\times tax \ rate[/tex]

[tex]X = (\$628,000 - \$552,000)\times (1 - 0.50) + \$180,000\times 0.50[/tex]

= $38,000 + $90,000

= $128,000

and Operating cash flow of Y in Year 4

[tex]Y = (Revenue - Cost)\times (1 - Tax \ rate) + Depreciation\times tax \ rate[/tex]

[tex]Y = (\$628,000 - \$552,000)\times (1 - 0.50) + \$24,000\times 0.50[/tex]

= $38,000 + $12,000

= $50,000

[tex]X + Y = Operating\ cash\ flow\ for\ the\ year\ 1 + Operating\ cash\ flow\ for\ the\ year\ 2[/tex]

= $128,000 + $50,000

= $178,000

hence, the X + Y is $178,000

Answer:

1 hour

Step-by-step explanation:

mph means miles per hour so in 1 mile it would be 1 hour

Answer:

2.8

Step-by-step explanation:

32cos 85≈2.8

Answer:

(B)Mr Smith drove 3 miles per day  more than Ms. Johnson.

(D) A reasonable prediction is that both  salespeople will drive about 110

miles each day.

(F)If both salespeople work 250 days  this year, they will drive about

27,500 miles for this year.

Step-by-step explanation:

Given the miles driven by the two salesman.

Mr Smith

128 , 150 , 118 , 85 , 166 and 25

[tex]\text{Average miles per day}=\dfrac{128+150+118+85+166+25}{6}=\dfrac{672}{6}\\=112$ miles per day[/tex]

Ms. Johnson

115,97,86,48,181 and 127

[tex]\text{Average miles per day}=\dfrac{115+97+86+48+181+127}{6}=\dfrac{654}{6}\\=109$ miles per day[/tex]

Therefore:

(B)Mr Smith drove 3 miles per day  more than Ms. Johnson.

(D) A reasonable prediction is that both  salespeople will drive about 110

miles each day.

[tex]112 \approx 110$ miles per day\\109 \approx 110$ miles per day[/tex]

(F)If both salespeople work 250 days  this year, they will drive about

27,500 miles for this year.

110 X 250=27,500 miles

Answer:

[tex]a_{1}=6[/tex]

Step-by-step explanation:

It is sum of arithmetic progression

[tex]$S_{20}=\frac{20}{2} [2a_{1}+(20-1)\cdot 4]$[/tex]

[tex]$880=10[2a_{1}+(19)\cdot 4]$[/tex]

[tex]$880=10[2a_{1}+76]$[/tex]

[tex]880=20a_{1}+760[/tex]

[tex]120=20a_{1}[/tex]

[tex]a_{1}=6[/tex]

Answer:

4 ÷ 5/6

= 4 × 6/5

= 24/5

= 4 4/5

Hope this helps.