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Gemiola [76]
2 years ago
10

the cost of 3 pints of ice cream is 7 dollars . what is the proportion used to find the cost ,c, of 9 pints of the same ice crea

m ?
Mathematics
2 answers:
AlekseyPX2 years ago
5 0

Answer:

21

Step-by-step explanation:

SSSSS [86.1K]2 years ago
3 0

Answer:

20.97$

Step-by-step explanation:

7/3=2.33

2.33*9 = 20.97

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2/x + 3/y = 13 ; 5/x - 4/y = -2​
Tomtit [17]

Given that

(2/x)+(3/y) = 13--------(1)

(5/x)-(4/y) = -2 -------(2)

Put 1/x = a and 1/y = b then

2a + 3b = 13 ----------(3)

On multiplying with 5 then

10a +15 b = 65 -------(4)

and

5a -4b= -2 ----------(5)

On multiplying with 2 then

10 a - 8b = -4 -------(6)

On Subtracting (6) from (4) then

10a + 15b = 65

10a - 8b = -4

(-)

_____________

0 + 23 b = 69

______________

⇛ 23b = 69

⇛ b = 69/23

⇛ b =3

On Substituting the value of b in (5)

5a -4b= -2

⇛ 5a -4(3) = -2

⇛ 5a -12 = -2

⇛ 5a = -2+12

⇛ 5a = 10

⇛ a = 10/5

⇛ a = 2

Now we have

a = 2

⇛1/x = 2

⇛ x = 1/2

and

b = 3

⇛1/y = 3

⇛ y = 1/3

<u>Answer :-</u>The solution for the given problem is (1/2,1/3)

<u>Check</u>: If x = 1/2 and y = 1/3 then

LHS = (2/x)+(3/y)

= 2/(1/2)+3/(1/3)

= (2×2)+(3×3)

= 4+9

= 13

= RHS

LHS=RHS is true

and

LHS=(5/x)-(4/y)

⇛ 5/(1/2)- 4/(1/3)

⇛(5×2)-(4×3)

⇛ 10-12

⇛ -2

⇛RHS

LHS = RHS is true

5 0
3 years ago
Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar.
AnnZ [28]

Answer:

I am stuck on this problem too. Is it on eacxt path.

Step-by-step explanation:

7 0
3 years ago
Write the sum as a product simple simplify the product (-2)+(-2)+(-2)+(-2)
iren [92.7K]
(-2)+(-2)+(-2)+(-2)
=-2-2-2-2
= -8
3 0
3 years ago
What is y when x = 60?
ArbitrLikvidat [17]

Answer:

300

Step-by-step explanation:

3 0
3 years ago
Use the counting principle to determine the number of elements in the sample space. The possible ways to complete a true-false e
Gemiola [76]

Answer:

2^26

Step-by-step explanation:

For a true - false examination ; number of options or possible outcomes = 2

Number of questions = 26

Using the counting principle ; the number of elements in the sample space ;

(2 * 2 * 2 *... * 2) for the entire 26 questions

This is equivalent to : 2^26

2^26 = 67108864

6 0
2 years ago
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