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3 years ago

Complete 5 A,B for 10 points.

Mathematics

1 answer:

lakkis [162]3 years ago

8 0

Answer:

y = (C-Ax) /B and x = (C-By)/A

Step-by-step explanation:

By = C-Ax

y = (C-Ax)/B

Ax = C-By

x = (C-By)/A

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At a farmers market strawberries cost $1.60 per pint, blueberries cost $2.30 per pint. A shopper bought twice as many pints of s

djverab [1.8K]

4 pints of strawberries and 2 pints of blueberries are bought

Solution:

Let "a" be the pints of strawberries bought

Let "b" be the pints of blueberries cost

Cost per pint of strawberry = $ 1.60

Cost per pint of blueberry = $ 2.30

A shopper bought twice as many pints of strawberries as pints of blueberries

Therefore,

a = 2b --------- eqn 1

They spent a total of $11.00. Therefore we frame a equation as:

pints of strawberries bought x Cost per pint of strawberry + pints of blueberries cost x Cost per pint of blueberry = 11

$a \times 1.60 + b \times 2.30 = 11$

1.6a + 2.3b = 11 --------- eqn 2

Substitute eqn 1 in eqn 2

1.6(2b) + 2.3b = 11

3.2b + 2.3b = 11

5.5b = 11

Divide both sides by 11

b = 2

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3 years ago

Perimeter plsss help

Murljashka [212]

Step-by-step explanation:

l= 3x+2cm

b=4cm

Perimeter of the rectangle= 68cm

Now, according to the formula, the perimeter of a rectangle= 2(l+b)

Therefore,

2(l+b)=68

2{(3x+2)+(4)}=68

2{3x+2+4}=68

2{3x+6}=68

6x+12=68

6x=68-12

6x=56

x=56/6

x≈9.33

In order to cross-check this answer, we compute in the values so therefore,

3x+2=3(9.33)+2=27.99+2=29.99≈30

Now, substituting this value in the formula we get,

2(30+4)= 68

The reason for cross-checking was to re-assure because of the decimal value of 9.33, that is why I approximated the expression to 30 in order to get the exact value of 68. otherwise using the decimal value of 9.33 computes an answer of 67.98 which off by a difference of 0.2.

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Answer:

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