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3 years ago

3. What is the sum or difference? 3x8 - 7x8

Mathematics

1 answer:

sammy [17]3 years ago

8 0

Answer:

-32

Step-by-step explanation:

3*8=24

-7*8=-56

-56+24=-32

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Triangle PQR where P(1,4), Q(-3,-4),R(7,k) is right-angled at Q. find the value of k

NikAS [45]

Answer:

k = -9.

Step-by-step explanation:

As the triangle is right-angled at Q, by Pythagoras:

PR^2 = PQ^2 + RQ^2

So, substituting the given data and using the distance formula between 2 points:

(7 - 1)^2 + (k - 4)^2 = (-4-4)^2 + (-3-1)^2 + (7 - (-3))^2 + (k - (-4))^2

36 + (k - 4)^2 = 64 + 16 + 100 + ( k + 4)^2

(k - 4)^2 - (k + 4)^2 = 180 - 36

k^2 - 8k + 16 - (k^2 + 8k + 16) = 144

-16k = 144

k = -9.

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3 years ago

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erik [133]

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Step-by-step explanation:

What you are trying to do is isolate the variable x. For you to do that you have to first simplify the left side of the equation and then you solve for x.

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3 years ago

The railroad company wants to sell $8,134 in tickets. If each ticket costs $7, how many

Licemer1 [7]

Answer:

1162 tickets will need to be sold

Step-by-step explanation:

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2 years ago

What is 23.5 in word form

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Enter the correct answer in the box

kakasveta [241]

Answer:

Step-by-step explanation:

Invert and multiply the second fraction.

$\frac{x^2 - 2x}{x^2 - 10x + 25} *\frac{x^2 - 25}{6x^2 - 12x}$

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Numerous cancelations can occur

(x - 5) [top right with x - 5 bottom left]
(x - 2) [top left with x - 2 bottom right]

Answer

$\frac{x}{(x -5)} * \frac{(x + 5)}{6}$

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2 years ago

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3. What is the sum or difference? 3x8 - 7x8​

3. What is the sum or difference? 3x8 - 7x8