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2 years ago

3. At the beginning of the day, a water tank contained 526.8 gallons of water. During the day,

Mathematics

2 answers:

dezoksy [38]2 years ago

7 0

Answer:

Step-by-step explanation:

the total amount of water used that day = 526.80 - 318.05 = 208.75 gallons.

Andru [333]2 years ago

5 0

Answer:

208.85

Step-by-step explanation:

It is 208.85 because when you have .8 + .05 =.85

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The area of a room in a dollhouse is 1,248 square inches. The width of the room is 8 inches. How long is the room?

AveGali [126]

The length of the dollhouse is 156 square inches

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2 years ago

What is the nth term of the sequence -2 -8 -18 -32 -50

andreev551 [17]

Answer:

-2n²

Step-by-step explanation:

Using the image attached:
We see that the second differences (blue ones) are all equal so we conclude that this is a quadratic sequence.
The quadratic sequence has the form:
$T_{n} = an^{2} +bn +c$

To find the value of a we just divide second difference ( -4 ) by 2:

$a = \frac{-4}{2}= -2$

Now we have:

$T_{n}= -2n^{2} +bn+c$

Substitute $n_{1}$ and $n_{2}$ into the equation above:

$T_{1} = -2(1)^{2} +b(1) +c$

$T_{2} = -2(2)^{2} +b(2)+c$

Since $T_{1}$ = -2 and $T_{2}$ = -8 , after simplification we have:

$b +c =0$
$2b+c=0$

The solution of this system is:

b=0, c =0

The general term is :

$T_{n} = -2n^{2}$

6 0

1 year ago

Multiply 5x^3(2x^4-x^3+3)

julia-pushkina [17]

Answer:

10x^7-5x^6+15x^3

Step-by-step explanation:

Distribute the 5x^3 to all the terms

8 0

2 years ago

On a fruit farm 1/3 of the trees are apple trees and 1/5 are lemon trees. The rest are fig trees. There are 90 trees in all.

Vaselesa [24]

Answer:

I'm not sure what the question was but I've worked out all the three types of trees

Step-by-step explanation:

⅓ + ⅕ = 8/15 because:

×5 ×3

5/15 + 3/15 = 8/15

therefore 7/15 is fig trees

90÷15 =6

6×5 = 30 apple trees

6×3 = 18 lemon trees

6×7 = 42 fig trees

7 0

2 years ago

How many revolutions does a go kart with a wheel circumference of 62.8318 inches make in a 1609 m race? Please answer as quickly

Rudiy27

Answer: 1008 revolutions

Step-by-step explanation:

1 revolution is equal to $2\pi r$

To find how many revolutions the wheel makes, you must divide the distance traveled in the race between the circumference of the wheel

You must first convert 62.8318 in to meters.

We know that 1 inch is 0.0254 meters

Then

$62.8318\ in*\frac{0.0254\ m}{1\ in}= 1.5959\ m$

$revolutions = \frac{1609}{1.5959}\\\\revolutions=1008.21\\$

Finally The wheel made 1008.21 revolutions

3 0

2 years ago