2 years ago

Please help me with this :)

Mathematics

1 answer:

Elena L [17]2 years ago

8 0

Answer:

i think :

3 hours and 35 min

2 hours and 45 min

4 hours and 30 min

4 hours and 5 min

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Does anyone know how to solve this?

Margarita [4]

Answer:

The correct option is c.

Step-by-step explanation:

Given that,

u = 7i+4j and v = 2i-3j

We need to find the product of u and v. The dot product of two vectors is given by :

$u{\cdot}v=(7i+4j){\cdot} (2i-3j)\\\\=(7i)(2i)+(4j)(-3j)\\\\=14-12\\\\=2$

So, the dot product of u and v is equal to 2.

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2 years ago

Which expressions are equivalent when m=1 and m=4? (picture attached)

Neporo4naja [7]

The second one is the only equivalent equation. Simply plug in each variable in each equation. And compare!

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2 years ago

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The altitude of an equilateral triangle is 22 inches. Find the perimeter of the equilateral triangle. Leave answer as a simplifi

torisob [31]

The perimeter of the equilateral triangle will be 76.2 in

<u>Explanation:</u>

Altitude of an equilateral triangle, H = 22 in

Perimeter, p = ?

Let a be the side of the triangle

We know:

$H = \frac{a\sqrt{3} }{2} \\\\22 = \frac{a\sqrt{3} }{2} \\\\a = 25.4 in$

Perimeter = 3a

P = 3 X 25.4 in

P = 76.2 in

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3 years ago

4 to the 4th power equals 256. Explain how to use that fact to more quickly evaluate 4 to the 5th power.

Ray Of Light [21]

Answer: Because 4 is the base of what is being exponentially multiplied, you can multiply 256 by 4 to get 4^5

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2 years ago

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Choose the abbreviation of the postulate or theorem that supports the conclusion that WAS NOT.

Shtirlitz [24]

Hello.

The asnwer is ASA -

If two angles and the included side are equal to two angles and the included side of another triangle.

Have a nice day

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3 years ago

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