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2 years ago

The graph of 2x – 3y = 21 crosses the y-axis at what point?

Mathematics

1 answer:

kifflom [539]2 years ago

8 0

2x-21=3y divide by 3. 2/3x-7=y. So at 7 it crosses

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Friction causes vehicles, such as this truck, to use more what?

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A. Gasoline

Step-by-step explanation:

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2 years ago

Nick bought apples at a farmers market where 5 apples cost $4.45.

Gwar [14]

Answer:

$0.89/apple

Step-by-step explanation:

$4.45

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2 years ago

The length of each side of an equilateral triangle is increased by 20%, resulting in triangle ABC. If the length of each side of

kompoz [17]

Answer: Area of ΔABC is 2.25x the area of ΔDEF.

Step-by-step explanation: Because equilateral triangle has 3 equal sides, area is calculated as

$A=\frac{\sqrt{3} }{4} a^{2}$

with a as side of the triangle.

Triangle ABC is 20% bigger than the original, which means its side (a₁) measures, compared to the original:

a₁ = 1.2a

Then, its area is

$A_{1}=\frac{\sqrt{3} }{4}(1.2a)^{2}$

$A_{1}=\frac{\sqrt{3} }{4}1.44a^{2}$

Triangle DEF is 20% smaller than the original, which means its side is:

a₂ = 0.8a

So, area is

$A_{2}=\frac{\sqrt{3} }{4} (0.8a)^{2}$

$A_{2}=\frac{\sqrt{3} }{4} 0.64a^{2}$

Now, comparing areas:

$\frac{A_{1}}{A_{2}}= (\frac{\sqrt{3}.1.44a^{2} }{4})(\frac{4}{\sqrt{3}.0.64a^{2} } )$

$\frac{A_{1}}{A_{2}} =$ 2.25

The area of ΔABC is 2.25x greater than the area of ΔDEF.

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2 years ago

If I was born in 1946 what year was I twenty years old

oee [108]

Answer:

If you was born in 1946 you would be twenty years old in:

1946+20

1966

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2 years ago