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3 years ago

Sam has 3 bottles of water. Together, Sam and Dave have at most 12 bottles of water.

Mathematics

1 answer:

finlep [7]3 years ago

7 0

If you need to find out how many bottles of water Dave has then at the most it would be 9 bottles

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Write the sum in sigma notation. $ \noindent 1 - x + x^2 - x^3 + \cdot\cdot\cdot + {(-1)}^n x^n $

Neko [114]

$1-x+x^2-x^3...+(-1)^nx^n=\sum\limits_{n=0}^{\infty}(-1)^nx^n=\sum\limits_{n=1}^{\infty}(-1)^{n-1}x^{n-1}$

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3 years ago

How many liters of water containing 7 grams of salt per liter must be combined with x liters of water which contains y grams [y

iVinArrow [24]

Answer:

$\frac{(2-y)x}{5}\text{ litres}$

Step-by-step explanation:

Let l litre of 7 grams of salt per litre is combined with x litres of water which contains y grams of salt per litre to yield a solution with 2 grams of salt per litre.

Thus,

Salt in l litre + salt in x litre = salt in resultant mixture

7l + xy = 2(l +x)

7l + xy = 2l + 2x

7l - 2l = 2x - xy

5l = x(2-y)

$\implies l =\frac{x(2-y)}{5}$

Hence, $\frac{x(2-y)}{5}$ litres of 7 gram of salt per litre is mixed.

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3 years ago

Which values of m and b will create a system of equations with no solution? Select two options.

Roman55 [17]

Answer:

2nd and 5th options

Step-by-step explanation:

the solution to a system of equations is at the point of intersection of the 2 lines.

If the lines are parallel then they never intersect and will have no solution.

The slopes m of parallel lines are equal.

The options with equal slopes , both - 2 are the

2nd and 5th options

6 0

3 years ago

Use grid paper to find the median of the data. 9, 7, 2, 4, 3, 5,9,6,8,0,3, 8

Oksanka [162]

Answer:

5.5

Step-by-step explanation:

0,2,3,3,4,5,6,7,8,8,9,9

there are to middle numbers

add then together (5 and 6)

which makes 11

divide 11 by 2

5.5

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3 years ago

A VISA CARD HAS A 3% CASH BACK BONUS FOR GAS AND A 1% CASH BACK FOR EVERYTHING ELSE. THIS MONTH YOU SPENT $1,500. 1/3 WAS FOR GA

oksian1 [2.3K]

Answer:

$25

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers