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3 years ago

I am confused by this question. Can someone help

Mathematics

1 answer:

alexira [117]3 years ago

7 0

square root both sides, divide by v both sides, divide by 2 both sides, divide pCd both sides

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Find three numbers such that their sum is 12, the sum of the first, twice the second, and three times the third is 31, and the s

Tpy6a [65]

Answer:

a = 3, b = -1, c = 10

Step-by-step explanation:

Let the three numbers be a, b and c.

Equation 1: a + b + c = 12

Equation 2: a + 2b + 3c = 31

Equation 3: 9b + c = 1

Equation 2 - Equation 1:

Equation 4: b + 2c = 19

Equation 3 times by the number 2

Equation 5: 18b + 2c = 2

Equation 5 - Equation 4

17b = -17

b = -1

Substitute into Equation 4:

2c - 1 = 19

2c = 20

c = 10

Substitute into Equation 1:

a + b + c = 12

a - 1 + 10 = 12

a = 3

8 0

3 years ago

Read 2 more answers

PLEASE HELP ILL GIVE BRAINLIEST

iris [78.8K]

Answer: it means simple interest

Step-by-step explanation it means simple interest because I means interest

4 0

3 years ago

7 watermelons cost $8.96. How many full watermelons can you buy for $20.

fenix001 [56]

Answer:

If each Watermelon costs $8.96, you can buy two

5 0

3 years ago

Dimensional Analysis

Firlakuza [10]

Answer:

$5.058 USD/gal
$60.70 USD to fill the tank

Step-by-step explanation:

You want to know the cost per gallon of gas and the cost for 12 gallons of gas when the cost per liter is $1.31 CDN and the exchange rate is $1.02 USD per CAD.

<h3>Cost per gallon</h3>

The conversion between liters and gallons is ...

1 US gallon = 3.785411784 liters (exactly)

Then the cost conversion is ...

$\dfrac{\$1.31\text{ CAD}}{1\text{ L}}\times\dfrac{3.785411784\text{ L}}{1\text{ gal}}\times\dfrac{\$1.02\text{ USD}}{\$1.00\text{ CAD}}\approx\boxed{\$5.058\text{ USD/gal}}$

The cost per gallon in terms of US dollars is about $5.06.

The cost for 12 gallons will be ...

(12 gal)×($5.058 /gal) ≈ $60.70

It will cost you $60.70 to fill your 12 gallon tank.

<em>Additional comment</em>

The price of gas is routinely specified to tenths of a cent, both in the US and in Canada. As of today, the cost of gas in Canada has declined to $1.864 CAD/liter. At today's exchange rate of about $0.77 USD per CAD, the equivalent price is $5.406 USD/gal.

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2 years ago

I really need help on this one, I don't understand. Please help if you can

ki77a [65]

Anwser:

The ratio of Saul's exact color is 3:1, so to make 16 gallons of paint he would mix 12 gallons of blue with 4 gallons of yellow. Hope this helps!

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3 years ago

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I am confused by this question. Can someone help​

I am confused by this question. Can someone help