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3 years ago

Prove that the expression A + B - C is equivalent to the expression C - B - A if A = 2x - 1, B = 3x + 1 and C = 5x.

Mathematics

1 answer:

zepelin [54]3 years ago

3 0

Answer:

both are equal is 0

Step-by-step explanation:

After substituting, the answer is 0 to both

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katrin [286]

Combine. Note that one positive and one negative = one negative

-2.1 + (-5.9) + (-3.7) = -2.1 - 5.9 - 3.7 = -11.7

-11.7 is your answer

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Answer:

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Step-by-step explanation:

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3 years ago

Car travels and average speed of 48 miles per hour how long does it take to travel 180 miles?

Neporo4naja [7]

speed =48mph

distance = 180 miles

we know that

time = distance / speed

$time=\frac{180}{48} hours$

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An isosceles triangle’s altitude will bisect its base. Which expression could be used to find the area of the isosceles triangle

omeli [17]

Answer:

$\dfrac{\sqrt{40}\cdot \sqrt{40}}{2}$

Step-by-step explanation:

The length of the base is the distance between the points 4+2i and 10+4i, so

$\text{Base}=|10+4i-(4+2i)|=|10+4i-4-2i|=|6+2i|=\sqrt{6^2+2^2}=\\ \\=\sqrt{36+4}=\sqrt{40}$

The middle point of the base is placed at point

$\dfrac{4+2i+10+4i}{2}=\dfrac{6i+14}{2}=7+3i$

The length of the height is the distance between the points 5+9i and 7+3i

$\text{Height}=|5+9i-(7+3i)|=|5+9i-7-3i|=|-2+6i|=\sqrt{(-2)^2+6^2}=\\ \\=\sqrt{4+36}=\sqrt{40}$

So, the area of the triangle is

$A=\dfrac{1}{2}\cdot \text{Base}\cdot \text{Height}=\dfrac{\sqrt{40}\cdot \sqrt{40}}{2}$

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Lera25 [3.4K]

Answer:

Step-by-step explanation:

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