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3 years ago

Apples are on sale for $3.12 per kilogram is the total cost of apples proportional to the total mass?

Mathematics

1 answer:

zloy xaker [14]3 years ago

5 0

Answer:

yes

Step-by-step explanation:

(there really isn't much else to say, it's quite simple)

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What's the square root of 247

Dahasolnce [82]

The square root of 247 is 15. If you round it to 3 decimal places it is 15.716. But, I'd prefer <span>15.716 as your answer</span>

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3 years ago

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11. Find the sum of the arithmetic series. overset [22] underset{k=1}\huge{Sigma) (-4k - 13) =

sergiy2304 [10]

Answer:

okay, we need to add up for all k=1 till k=22

we could do it like this

(-4*1 -13) + (-4*2 -13) + (-4*3 -13) + ...

but this is long and boring, so we need another valid, yet vastly faster method to calculate this sum

we know that the "-13" part will occur 22 times, so let's write this component as "-13*22"

the -4k gents bigger with each step, k will take all the natural numbers from 1 to 22

so we could write

"-4 * (1+2+3+4+5+6+7...+21+22l

alot simpler and faster, but not fast enough

let's add up all numbers from 1 to 22 into one number

1 + 22 = 23

2 + 21 = 23

3 + 20 = 23

...

this works eleven times (bc we use up 2 numbers in each step), so the numbers from 1 to 22 added up are just

23*11= 230+23 = 252

now let's construct the final calculation

-4 * 252 -13*22 = -1294

there's your sum.

hope it helps you overall.

brainliest would be very kind ic some else leaves an answer, may it be just a greeting

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3 years ago

What is the measure of angle CBE?

GarryVolchara [31]

Answer:

72°

Step-by-step explanation:

180-3x=2x

5x=180

x=36

Angle CBE = 2(36) = 72

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3 years ago

Two families went to Rollercoaster World.

Alona [7]

Answer:

Children ticket cost $30 and adult ticket costs $40.

Step-by-step explanation:

Given that:

x = price of a child ticket

y = price of an adult ticket

According to given statement;

3x+2y=170 Eqn 1

4x+6y=360 Eqn 2

Multiplying Eqn 1 by 3

3(3x+2y=170)

9x+6y=510 Eqn 3

Subtracting Eqn 2 from Eqn 3

(9x+6y)-(4x+6y)=510-360

9x+6y-4x-6y=150

5x=150

Dividing both sides by 5

$\frac{5x}{5}=\frac{150}{5}\\x=30$

Putting x=30 in Eqn 1

3(30)+2y=170

90+2y=170

2y = 170-90

2y = 80

Dividing both sides by 2

$\frac{2y}{2}=\frac{80}{2}\\y=40$

Hence,

Children ticket cost $30 and adult ticket costs $40.

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3 years ago

Solve the following inequality for x.

Alexus [3.1K]

Answer:

X < -1

Step-by-step explanation:

4x - 5 + X < -10

5x < -5

× < -1

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Apples are on sale for $3.12 per kilogram is the total cost of apples proportional to the total mass?​

Apples are on sale for $3.12 per kilogram is the total cost of apples proportional to the total mass?