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3 years ago

Please help with this simultaneous equation you can use any method(Only number 6)

Mathematics

1 answer:

igomit [66]3 years ago

4 0

Answer:

Pencil: $0.60 Rubber: $0.48

Step-by-step explanation:

Let the cost of a pencil be p and the cost of a rubber be r.

$p+r=1.08$ (Equation 1)

$4p=5r$ (Equation 2)

Divide both sides by 4:

$p=\frac{5}{4} r$

Substitute this into Equation 1:

$\frac{5}{4} r+r=1.08$

Multiply both sides by 4:

$\frac{5}{4}r* \:4+r* \:4=1.08*4$

$5r+4r=4.32$

$9r=4.32$

Divide both sides by 9:

$\frac{9r}{9}=\frac{4.32}{9}$

$r=0.48$

Since r + p = 1.08,

$p=1.08=0.48=0.60$

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klemol [59]

Answer:

The correct order of the steps is CEABD ⇒ B

Step-by-step explanation:

Let us arrange the figures

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3 years ago

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Ksivusya [100]

Answer:

D, irrational numbers,

Step-by-step explanation:

75 is part of all groups except irrational numbers, it is an integer, a whole number and a natural number..

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2 years ago

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During one term Rachel took 2 mathematics test her mean score was 75 she scored 12 points more on the first test then the second

MaRussiya [10]

Answer: she scored 69 points on the second test.

Step-by-step explanation:

Let x represent the number of points that she scored in the first test.

Let y represent the number of points that she scored in the second test.

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If she scored 12 points more on the first test than the second test, it means that

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Substituting x = y + 12 into equation 1, it becomes

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Vesnalui [34]

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3 years ago