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3 years ago

5

Olivia spent $20.00 on pencils and pens. Each pencil cost $2.00, and each pen cost $2.50. Which equation represents the number o

f pencils, x, and the number of pens, y, Olivia could have bought?

1 answer:

Solnce55 [7]3 years ago

5 0

Answer: $2.00x + $2.50y = $20.00

Step-by-step explanation:

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2 years ago

Find the area of a triangle whose vertices are (0,0), (4,2), (-1,2)

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Answer:

Therefore area of a triangle whose vertices are (0,0), (4,2), (-1,2) is

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Step-by-step explanation:

Given:

Let the vertices be,

point A( x₁ , y₁) ≡ ( 0 , 0)

point B( x₂ , y₂) ≡ (4 , 2)

point C(x₃ , y₃ ) ≡ (-1 , 2)

To Find:

Area of Triangle = ?

Solution:

If the Vertices A( x₁ , y₁), B( x₂ , y₂) and C(x₃ , y₃ ) then the Area of Triangle is given by

$\textrm{Area of Triangle}=\dfrac{1}{2}(x_{1}(y_{2}-y_{3})+x_{2}(y_{3}-y_{1})+x_{3}(y_{1}-y_{2}))$

Substituting the values we get

$\textrm{Area of Triangle}=\dfrac{1}{2}(0(2-2)+4(2-0)+(-1)(0-2))$

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3 years ago